Showing posts with label Hal Schmitt. Show all posts
Showing posts with label Hal Schmitt. Show all posts

Wednesday, April 24, 2013

The $5 Photo Accessory (that could save your life)


As nature, landscape, and wildlife photographers we often place ourselves in locations and situations that are a bit off the beaten path. When we do go out to make photographs it is worth thinking a little about possible contingencies and how we will handle them should something occur.  As the most basic precaution, I consider one of the least expensive pieces of gear a photography essential, the simple whistle.

In our modern society, we tend to take our safety or our ability to rapidly communicate for granted.  Sometimes that is the case.  For example, if you are out with me you know you are with an instructor who is certified in CPR and first aid, has had extensive survival training, and handles high stress situations well.  More often though, most photographers think if they have their cell phone they are ready and help is just a call away.  But it is amazing how often we find little to no cell coverage, a dead battery, or a situation where the phone is just out of reach.

As a pilot, I learned to plan for contingencies and to prioritize redundancy in safety or communication systems.  To back up your phone one of the simplest preparations you can make is to carry a whistle when you go out to make photographs.  Survival situation after survival situation has proven that a whistle is a "must have" piece of gear.  Look at any list of items you should have in the field or wilderness and a whistle will be on it.  Oh by the way, it is not enough to have the whistle with you, have it on your person and easily accessible with either hand.

Photographers in the field are just like hikers, campers, and other outdoor enthusiasts.  Interestingly, they tend not to think of themselves as such because our hobby, passion, or profession is so dependent on high tech gear.  But in most cases there is no difference. As an example, Hal has a friend in Alaska who recently almost lost his life while out in the wild.  Overcoming incredible odds he was rescued and recovered, but only because of his whistle.  He was in a bad position and the only way he could try and find help was to blow his whistle.  He blew for over an hour and finally someone heard and investigated. They joked afterwards that his whistle was the $2 accessory that saved his life.  Pretty amazing considering the guy had thousands of dollars of other gear with him. It is also worth mentioning that Hal's friend broke one of the cardinal rules, he went out alone without using the buddy system (the topic of another post.)

So when you are packing up the camera, lenses, and tripod, make sure to put a simple whistle in your pocket.  If you ever run across him in the field, ask Hal to see the four essential pieces of shooting gear: Hoodman HoodLoupe, cell phone for DOF calculations/comms, a good knife, and a whistle.

Always remember making the photograph is optional but making it home is mandatory. (Paraphrased from my mountaineering buddies.)

Fiat Lux!

Tuesday, April 16, 2013

Lightroom 5 Beta Features - Hal's Favorites



The three part video demonstrates and discusses my favorite features of the Lightroom 5 beta.  The full feature list is below but my favorites are: Improved spot removal and retouching, the Radial Filter, improved crop overlay, import functionality, Smart Previews, and Upright for auto lens corrections.

 

In the video I reference additional keyboard shortcuts for the Spot Removal and Radial Filter tools.  The shortcuts are shown below.


Spot Removal (Q)
-New circle spot (auto-find source): Single click
-New circle spot (user-defined source): Ctrl drag
-New circle spot (scale from center): Ctrl Alt drag
-New circle spot (scale from anchor): Ctrl Shift drag
-Connect two circle spots: Single click + Shift click
-Increase circle spot size: ]
-Decrease circle spot size: [
-New brush spot: Click drag
-Constrain brush spot to straight line: Shift drag
-Cycle Spot Type: Shift + Q
-Auto-Find New Source: /
-Visualize Spots: A
-Hide Spot Overlays: H
-Delete spot: Alt select
-Delete selected spot: Delete
-Delete multiple spots: Alt drag select

Radial Filter (Shift + M)
-New elliptical mask: Drag
-Apply new mask to crop bounds: Ctrl double-click
-Expand existing mask to crop bounds: Ctrl double-click on mask
-Duplicate: Ctrl Alt drag
-Invert elliptical mask: ’ (apostrophe)
-Hide/show guide: H (short press)
-Hide guide on press, show on release: H (long press)
-Apply & dismiss: Double-click on photo
-Delete selected elliptical mask: Delete

Major feature list
-Smart Previews
-PNGs now supported in Lightroom
-New fullscreen mode.  F key is true full screen.  Legacy full screen mode is Shift + F
-Configurable grid overlays for Loupe view
-New searchable criteria for Smart Collections - File size, Image size, Image bit depth, color channels, Color mode, Color profile, Smart Preview statsus, and PNG
-Advanced healing brush for Spot Removal
-Radial Filter
-Upright auto lens corrections
-LAB color readout on histogram.  Right click on the histogram for a flyout menu.
-New book features

I will do additional videos to show some of these upgrade features.

Fiat Lux!

Wednesday, March 20, 2013

Computer Specs

One of the most common questions we field concerns computer technical specifications.  People often ask how they should equip and configure their next machine for digital photography purposes (often phrased as Photoshop or Lightroom purposes.)  So let's talk computers for one little post.


 Recent build in the LIGHT studio.

LIGHT recommends the current specs as an excellent configuration.  Off the side I will add comments and fall back positions.

Processor - Core i7 quad core.  We are currently using the Core i7 3770 at 3.4 GHz.  Although the two programs listed above perform best with a fast processor a good fall back position is found in the Core i5 3xxx options. We could go on a bit further regarding hyper threading or adding additional physical cores but we have not seen a huge requirement in typical digital photography needs.  If you push a bit beyond the ordinary with your work, take these into consideration.

Memory - 16 GB.  Most baseline systems these days are equipped with 8 GB of RAM but 16 will give you a nice performance boost.  There normally is no need to get the fastest clock speed RAM available unless you are also going to play games.  On the lower side, go with 12 and on the upper top out at 32.

Graphics - Dedicated video card.  There are a huge number of options here but start with an nVidia or ATI set with at least 1 GB.  You may be tempted to go with the higher end cards but you will not see a huge benefit unless you are working with video or gaming.  If you are thinking of running two or more high resolution displays you may want to upgrade as well. With all that said, the integrated graphics on the Core i5 and i7 (from 2500-4000) are pretty good.  You might be surprised how well they work.  The nice thing is you can always add a dedicated video card later if you need to.

SSD - Solid state drive for programs and speed critical data.  SSD prices have dropped significantly and the performance boost is really nice.  An SSD is not a must have but a majority of our clients enjoy the faster start up times and fast program launches.  At a minimum go with a 128ish GB drive.  You can go bigger (my laptop has a 512 GB SSD) but the drives will be a bit pricier.

Hard drives - At least two, one for data and one for scratch/working space.  Hard drive prices have come back down so we like at least 1 TB for storage and 320-500 GB for scratch.  Try for the 7200 rpm drives and if you want faster there are 10k and 15k rpm available. 

Ports - USB 3.0 and Thunderbolt.  Odds are you will connect external storage to your machine and you want it to be fast.  At the top of the list is the Thunderbolt connection, huge speed and flexibility but not as many peripheral/storage choices and much more expensive.  Not nearly as fast but almost ubiquitous and priced right, the USB 3.0 connection is a necessity. Definitely think about these options as one of the most frustrating things is waiting for your machine to communicate with external storage (Lightroom users especially.)

Fortunately, these specs are not too far out of reach for most folks.  Although you may pay a bit more for the system, configuring it properly will save you big in time and workflow efficiency.

 Pure fun building this little beast of a Photoshop machine.

For the somewhat adventurous, LIGHT recommends building your own system.  I recently built the computer shown in the pictures above for about $1275 and two hours of my time.  It has all of the options listed above and is unbelievably fast.  For those who may be thinking Thunderbolt and Windows?  My machine is Windows and has two Thunderbolt ports along with eight USB 3.0 and a handful of USB 2.0.  Depending upon how and when you source your parts the do it yourself option can save you quite a bit.  More importantly, the process forces you to learn about the options and make smart choices as to what is best for your needs and workflow.

Any questions, comments, concerns, or addtions add a comment or email me at hal@lightworkshops.com.

Fiat Lux!





Monday, February 4, 2013

Add Two Steps

Recently, we have seen an increase in photographers using the High Pass filter in Photoshop to add edge contrast and texture detail to their images.  This is a cool technique but when you use the filter remember to add two more steps; desaturate your layer before applying the High Pass filter and always target your filter effects with a mask.


You may have seen or heard many photographers talking about how they sharpen only on the Lightness channel in L*A*B* or they make sure to change the blend mode of their sharpening layers to Luminosity or they use the Fade option with a Luminosity blend mode change.  There are many good reasons to make these switches and we suggest you use them in your sharpening or contrast boost workflow.  For the same reasons, when you use High Pass desaturate.

It is a common misconception that when you run the High Pass filter you are left with an image that is baseline 50% gray and only shows brighter or darker tonality at the edge contrast and texture detail.  Instead, High Pass may retain color information from the original image.  This can lead to color shifts or colored fringe along a high contrast edge similar to haloing.

 Notice the remaining color.
Our workflow is to copy the background layer or stamp visible if you have a multi-layer document and then desaturate via Image>Adjustments>Desaturate this can also be executed with the keyboard shortcut of CTRL+Shift+U for Windows or CMD+Shift+U for Mac.


For those who want to play or have more control you can
  • Run a Black and White adjustment instead and modify the tonality of the color arcs.
  • Use multiple layers of High Pass set to different radii.
  • Leave the color in your layer in order to generate a color boost. Watch out for fringing!
  • Use the filter on a Smart Object so you can make changes.
  • Invert your filter layer to decrease contrast and texture detail.
The second misconception is that areas that appear to be smooth after running the High Pass filter are not. Make sure to use a mask and target the filter effect to only those areas that you want to modify. In general, LIGHT does not recommend enhancing the edge contrast or texture detail on the following:
  • The sky especially blue sky.
  • Areas of constant color or tone.
  • Flowing water.
  • Out of focus areas.
  • Human skin especially female skin.

Fiat Lux!

Wednesday, January 16, 2013

2013 Metadata Presets Update

I am certain you have already done this but just in case you have not make sure to go in and modify your metadata presets.  This is also a great time to verify you made a new parent folder reflecting the new year.

In the quick video Hal shows the update process for Lightroom and the Bridge.
Annual Metadata Preset Update (2013 Version) from Hal Schmitt on Vimeo.

Tuesday, January 15, 2013

LR Videos Streaming Free

If you have not seen this announced yet, Elephorm is streaming Hal's Lightroom training videos free until the 31st of January.

We are biased but there is no better Lightroom training available and FREE for the next two weeks makes it even better.


Elephorm Lightroom


Have fun and Fiat Lux!

Saturday, December 22, 2012

Impromptu Flash Accessory for Holiday Family Portraits!

Packing for a Christmas or family holiday trip can be a bit hectic...sometimes you might even forget a modifier for your Speedlight.
Hal scooting with his homemade modifier.

Now what you are about to see is what we like to call "bush league" but the modifier/soft box works extremely well and you can definitely find the materials at grandma's house! Depending on the size of your flash you can also create any size you want.


For a very simple modifier here are the items you will need:

  • 2 plastic or paper plates (you can choose dinner plate size or a dessert platter depending upon the size of your flash and the "softening" power you want)
  • Gift box tissue paper (white is most most versatile but a colored tissue will be just like a colored gel)
  • Tape 
  • Scissors

All of the pictures below show the entire process. Start by cutting out the inside or flat portion of the plate. Try to keep as much of the cut out portion because you will use it later in the process. The ring you are left with is the frame for the modifier.



Cut or fold the tissue paper into a square about the same size as the frame/ring.  One piece will do just fine but if you want to make the light more even, add an additional layer or two.  It is always a trade-off though when you add layers.  The light becomes more even but you will lose more of the flash's effective power.  For example, when I made this example, I used four layers of tissue and lost approximately 2.5 stops of light.

Tape the tissue to the frame.  You can get all "gucci" with it but I used four pieces and have a nice, tight surface.










From the cutout portion of the plate, fashion a rectangle or two.  Put onto the end of your flash to act as an attachment collar.










With the other plate cut out two rectangular supports.  Tape one end of each to the attachment collar on the flash.  The final step is to tape the supports to the plate/modifier.  When you put the flash on your camera, I like to change the zoom to Manual at about 50mm.






Simple but effective.  When we talk about light's quality of being either hard or soft, the only factor that matters is the size of the light source relative to your subject (this is, of course, controlled by the size of the light source and the distance from the source to the subject.)  The bare surface area of the flash is @ 3.7 square inches.  After adding the "bush league" modifier the surface area is @64 square inches. That is an increase of 17X.  One of the biggest issues with many modifiers is they do not really change the surface area by that much. But 17X?  That is effective!

Another nice feature of this homemade version is it is extremely light.  Whenever you add an attachment to your flash, always consider weight.  If the modifier is too heavy or has a lengthy moment arm you can easily damage your flash.





Thursday, December 13, 2012

The Ultimate Stocking Stuffer


This is the ultimate stocking stuffer for any photographer.  Honestly, this is a multi-tool that everyone should have photographer or not. As you know I am very picky and demand my gear be the absolute best.  This multi-tool is the real deal.  The quantity and variety of bits in this kit is awesome.  I started using it about three weeks ago on my tripod but soon found out it works on just about everything from camera, to eye glasses, to computer, etc.  With 22 bits in hex, torx/star, flat, and cross this is my primary tool to adjust most small gear and equipment.



The entire kit packs very light and compact and is now a permanent addition to my bag.  For those who have a Really Right Stuff Tripod in either the 2 or 3 series the tool even fits right into the center column, so it is always available. There are other cool uses as well that you can check out if you follow the link below.



Really Right Stuff calls this the MTX and you should really have one.  Check it out at the following link MTX. 


For full disclosure, I am not paid to recommend this gear and the link above is not an affiliate link.  I use RRS because everything they make performs for me in the studio and in the field.

Fiat Lux,

Bull Schmitt

Wednesday, December 5, 2012



While I was looking over some images for yesterday's blog I found this sequence.  Thought it would make a nice simple time lapse.

Gorgeous Alaska day and a slow humpback whale dive.  Shot the sequence on my photo tour with a Canon 1D Mk IV and an EF 70-300 4.5/5.6L.

Put the time lapse together with Lightroom. Recommend the 720 quality option.

Tuesday, December 4, 2012

The Test Shot

Killer whale attacking a Steller's sea lion

There are many shots that require you to react extremely quickly in order to capture what you want such as these whales I photographed during one of my Alaska workshops.  One of the most successful techniques you can use is what I call the "test shot."

The test shot has two primary objectives, exposure and rough focus.  When taking a test shot your actual subject is usually not in the frame.  For example, these whales break the surface in less than a second and if I wait until the subject is in the frame to find exposure I will be less than successful most of the time.  If instead I anticipate where the subject will appear or what the event will look like, I can figure out exposure ahead of time very easily.  I can also pre-focus so that the precision focus process is much faster once my subject is in frame and my auto focus sensors are properly placed.

A humpback whale going for it in front of Devil's Thumb

When you make a test shot, it is often times not adequate to set exposure based on the environment/background.  You need to anticipate what will drive the exposure.  For example, in all three whale shots the critical elements are the white water and the white fins/body.  If I make a test shot of just the water and set exposure without considering the extreme tonal difference between water and white water/whale, I will, most likely, blow the highlights in the shot. When I made the test shots for these images, I set my exposure based on white not on the water/background.  You can use rules of thumb to underexpose for the predicted highlights but I prefer actual meter data, when I can get it.  In these examples, I changed my camera's metering mode to Spot and then I set exposure off of something white.  I actually used the boat's wake but a white sheet of paper would work as well.  As long as the white is under the same lighting conditions as my subject, my exposure will work perfectly.

.1" earlier

This process is simpler when shooting in Manual exposure mode but can be used with Aperture or Shutter priority and auto exposure lock.  Once I have my exposure, I pre-focus to the expected subject distance and take a test shot and evaluate. With my exposure and pre-focus set, I am much better prepared to quickly execute the actual shot when the action occurs.

I use test shots all the time to give myself the advantage when something might happen and my reactions have to be perfect. When I am out photographing, people find it odd that I am shooting every now and again at what appears to be nothing. But my "strange" behavior pays off.  If you stack your deck ahead of time you will enjoy success in a more consistent and repeatable manner. 

Fiat Lux!


Friday, November 30, 2012

Topaz Webinar with Hal

Hal will be leading another webinar and discussion for Topaz Labs next week.  Click the link below to register and join Hal on the 6th of December at 4 PM CST.

Total Workflow with Topaz!

Fiat Lux!


Wednesday, October 31, 2012

Topaz DeNoise Webinar is Available on YouTube





My recent Topaz DeNoise webinar is available to watch on YouTube. 

Enjoy.

Fiat Lux!

Wednesday, October 24, 2012

Tiny Planet Mania



It seemed that during the California Photo Festival I could not swing a cable release without hitting a few people discussing or playing with the app called Tiny Planet.  The app manipulates an image in a pretty cool way and the result often resembles a small planet in the center of a square frame.

Although the buzz was about the phone app, the process has been around a while and there are many websites and blogs dedicated to the effect.  So for all those who do not have the app or if you have it but want to apply a similar effect to your big photos, here is the quick way to do it in Photoshop. 

Oh by the way, Jill Waterbury, Light's in house iPhoneography instructor, introduced just about everyone to the app and also requested the Photoshop method.  So here it is for Jill and anyone else who wants to play around with their images to have fun and create.

The Photoshop method works best on panoramic images, especially 360 degree panos, but can be done to any image.  To demo the process, I will start with a 360 pano I shot during Click.


The basic process is to open the image in Photoshop and then to apply a simple filter called "Polar Coordinates."  This filter is found in the Filter>Distort menu.  Of note it will only be available with 8-bit images so if you have a 16-bit workflow you will have to change to 8. (Go to Image>Mode>8-bits)  Hand in hand with the depth change you may need to convert the image to a smaller color space.  For example, Light recommends a 16-bit workflow using ProPhoto RGB.  If you go from 16 to 8, you should also convert to either Adobe RGB (1998) or sRGB via Edit>Convert to Profile.

When you choose the Polar Coordinates filter you see the dialog below.


Make sure to select the "Rectangular to Polar" button.  When you apply the polar coordinates filter you get the following image.

There was obviously a change but the filter created a "down the rabbit hole" effect and it is not a square frame, not what we are looking for.  Interestingly, this effect is found in the app but is called "tiny tube."  So before you apply the filter, you need to do two other steps.

First, go to Image>Image Size.  In the dialog box, make sure resample image is checked but uncheck Constrain Proportions.




 Go to the Width and Height text boxes in the Pixel Dimensions section and make them equal.  I normally find the smaller number and change it to the larger.  So in the example above, I get this.



Your image will look distorted but go with it.


Next go to Image>Image Rotation>Flip Canvas Vertical and the image will flip upside down.



Now we are ready to go back to the Filter>Distort>Polar Coordinates.  The result is a tiny planet-like square image.


If you have a 360 degree pano all you have to do is the process described above.  If you do not have that type of image you can still do the process.  The best types of images to use are those with a
panoramic aspect ratio, images with little detail on the top and bottom, and a strong linear shape but with vertical development in the middle, vertical third of the frame. Even with the perfect image, there may possibly be a few more steps after you apply the filter. So here goes with a normal image.


This image does not have a panoramic aspect ratio (in general vertical images are more challenging to use than landscape) but there is limited detail at the top and bottom of the frame with a linear shape along the horizon displaying strong vertical development.

For any image that is not a 360 degree panorama, the first step is to make sure the horizon is level.  After that do everything we did above.  You will get the following intermediate images.


Just as before run the Polar Coordinates filter and you get this.


There is the tiny planet but there is a seam at the top because our image ends did not match perfectly.  No worries, do a quick retouch and rotate the image to the desired angle and you get this.


A small planet with a volcano or two.  This effect can be used on all sorts of images so have fun.  Here is one more for the fun of it, this is a composite of a tiny planet and a tiny tube from the same image.



As you play remember to try the opposite effect.  If you do not flip the image you can make a tiny tube like this one. (the opposite of the image at the top of this post.)


Fiat Lux!





Tuesday, September 11, 2012

Denoise Video



A recent video showing my Topaz Denoise and Detail process.

Thanks for the questions that help generate these videos!

Fiat Lux!

Thursday, September 6, 2012

Ambrosia Coating: Rolling it on.



Ambrosia Coating: Application to Canvas with a roller. from Hal Schmitt on Vimeo.


A quick video showing the process and disussing tactics, techniques, and procedures for effective canvas coating with a roller.  For this demo, I used a Canon ipf 6350, Alpha Strike's new Lucia/Lucia EX ready canvas, and Ambrosia.

With this new coating you can also coat water resistant photo and art papers;archival protection without glass or glazing, very, very cool.  More videos on those soon.

For all of the product specs check out Ambrosia.


Thursday, August 23, 2012

Elephorm Universal Player FAQ - For Hal's Lightroom Tutorial

Backpack: Universal Player FAQ We have received a lot of questions regarding how to use the Elephorm Universal Player with Hal's Lightroom videos.  Here is the entire FAQ for the player with step by step description and images.

For those who might not be familiar Hal's Lightroom training is available via streaming video or you can download the content to your desktop/laptop.  If you download the interface to play the videos is the Universal Player.

Currently, you can stream all of the videos on your idevices but the content is not downloadable there yet.  An iOS app for iPad/Phone is almost ready though.

Thank you to everyone for providing the great feedback and reviews!

If you have not checked the training out yet, you can find it here Elephorm - Lightroom

Universal Player FAQ







What is the Universal Player ?



If you have access to Internet, you can view our tutorials with no installation needed. But what if you want to train yourself on the train, the plane or in an hotel with sluggish internet access ? That’s when our Universal Player comes in handy. We’ve made a super simple to follow step-by-step.




Player installation  


Connect to en.elephorm.com with your email and password, and locate the Universal Player Blob, as shown on picture below. Click on the Install button and follow instructions.




Player Login  


After installation, the player will open automatically. You will then be prompted to accept the End User License Agreement (EULA) and to enter your details (same email and password you use to connect to en.elephorm.com)




Your library  


You are now in your library, and you’ll be able to download your tutorials to HD in a few clicks.
  • Click on the Arrow Icon on the right to initiate download
  • On first Download, you’ll be prompted to choose a directory. We suggest you use the one proposed, and avoid external HDs. Once chosen, all tutorials you may download must go into the same folder.
  • The flashing Arrow and the VOD label that turns into a HDD label means your videos are being transferred to your HD.
  • If you see a VOD label next to the Arrow Icon, you didn’t downloaded yet, but can view as you would on the site, that is streaming.
Please move on to next section to understand what’s happening behind the scenes




Understanding the Player  


NOTE: To access the Lessons Summary shown in the picture below, you just have to click on the Chapter Access button in the Library.
A few things you should know:
  • The player will download all the videos in a folder that should not be moved or renamed. You can choose which directory the folder will be created to, we suggest you should use the one first proposed.
  • Some tutorials have 200 chapters, and an over 15 hours duration. It will take some time to download, so please plan ahead !
  • The player downloads a maximum of 3 videos at a time, to save bandwidth. These three videos cannot be watched until completely downloaded (a progress bar shows download status, see picture below), all other videos, either downloaded or not can be viewed.




Still need help ?  


Please feel free to contact us on en@elephorm.com !




 

 

Saturday, August 18, 2012

Digital Photo Experience Interview with Hal

Rick Sammon in "The Suit"


Hal on the Digital Photo Experience with Rick Sammon and Juan Pons

Check out the new podcast from Rick Sammon and Juan Pons over at the Digital Photo Experience; great information and a fun interview with Hal.

Fiat Lux!

Monday, July 30, 2012

Landscape at f/4? Know your DOF

I am a huge believer in understanding and practicing the basics and the fundamentals of photography.  Moreover, it seems most difficult tasks in life, including photography, come down to how well can you execute the basics. To that end, I would like to discuss one of the most common practices I see in the field when shooting landscape, stopping down for no reason. 

The conventional wisdom is to stop down when shooting landscape to increase depth of field (DOF).  Although stopping down does increase DOF it is not always necessary to do so and may, in fact, hinder your ability to make the best shot. 

DOF can be an incredibly complicated and confusing topic but it is worth spending a small amount of time talking about the primary contributors to DOF.  Most photographers are taught that DOF is controlled by aperture; the wider the aperture the shallower the DOF and vice versa.  What is not commonly taught are the two other primary variables that influence DOF, focal length (of the lens in mm), and focal distance (physical distance from shooter to focal point.) 

Just as every photographer quickly memorizes the aperture/DOF relationship they should do the same with focal length/DOF and focal distance/DOF.  So a little homework, memorize the following.
  • The wider the aperture the shallower the DOF
  • The longer the focal length the shallower the DOF
  • The shorter the focal distance the shallower the DOF
and the opposites
  • The narrower the aperture the deeper the DOF
  • The shorter the focal length the deeper the DOF
  • The longer the focal distance the deeper the DOF
One of the best ways to see these rules in action  is to use a DOF calculator and play around.  If you want to go "old school" there are "whiz" wheels out there to show the relationships.  But since this is mid 2012, I recommend finding a DOF app for your smart phone or device.  There are a huge number of these apps available just search for "DOF calculator" and download. 

After playing with a DOF calculator app for just a small amount of time, you will be amazed how quickly you learn the rules and begin to visualize constructing DOF for every shot you take.  When you know the rules and relationships of DOF you will approach your shots from a position of knowledge and you will, most likely, modify some of your accepted habits and practices.  You might even decide to take your DOF calculator app with you on location and run some numbers before you shoot.  I do not think you will do this all the time but if you need some intel, back up, or encouragement break out the app and "run the numbs." 

Recently, I shot some landscape in Alaska and used my understanding of DOF to shoot handheld landscape at f/4 with everything in the shot acceptably in focus.  This goes against the conventional wisdom but it worked perfectly.  The shot I ended up with is shown below.


For this shot I used the focal point shown @1000' from me, 43 mm focal length, and an aperture of f/4.  I shot a bracketed series for HDR and did it handheld as my tripod was not available.

If I had followed the conventional wisdom I would have stopped down to f/16 and would have had the situation shown below.

f/16 would have given me plenty of DOF but a shutter speeds of 1/60, 1/250, and 1/15.  These are, of course, too slow for my handheld situation.  I could have increased my ISO to yield faster shutter speeds but I did not want the additional noise, especially when shooting for HDR.

Instead of changing ISO, I changed aperture and opened up to f/4 which gave me the situation shown below.

f/4 also gave me plenty of DOF and shutter speeds that I could work with hand held.  Because my focal length was 43mm with a focal distance of 1000', changing aperture did not have an appreciable effect on this shot's practical DOF.  As a result, the entire shot is acceptably in focus, even the foreground as it is greater than 52' from me.  Sure f/16 gave me 38' more DOF but it was irrelevant.

Now there will be times and places this does not work but if you understand the basics you will recognize them quickly.  When you do you will find the solution and make the shot work.

More on this topic next time.