[Editor’s Note. We hope everyone had an enjoyable three day weekend, and making sure to remember the men and women who gave their lives in service of our country. Here’s another great piece by Ben Hendel, this time talking about an interesting bit of software used for calibrating your lenses. You need to be following Ben on Instagram. He got a chance to take two big lenses into Animal Kingdom recently and got some GREAT photos. So jealous of the opportunity Ben had. Thanks again Ben for the article! ].
High-end cameras cost a lot of money and you get a great product for them. Same thing goes with lenses. But what if I told you that if you just bolt your new-and-shiny lens to your new-and-shiny camera, that you aren’t getting everything you’ve paid for? Because of production variables and tolerances, not every camera and lens leaves the factory “perfect.” The camera body manufacturers know this, and they build in a way to fine-tune your camera body to your lenses. On my Nikon, this is called AF Fine-Tune, and is usually called AF Microadjustment (AFMA) on a Canon.
Disclaimer: NOT ALL CAMERAS SUPPORT THIS FEATURE. It is usually found in higher end models. My D7000 had it, my D60 did not. [Editor’s note, my Canon 60D does NOT have this feature. Guess that saves me from getting the FoCal software myself. Will keep this in mind for the next camera I get.]
Modern cameras can hold multiple lens profiles. As you can see, my camera can hold 12 different adjustment values in memory, each one tied to a particular lens. If you have more than 12 lenses, well, you’re richer than I am. Spread the wealth, eh? I accept PayPal. If you rent a lot of lenses, you may want to keep half an eye on how many values you’re storing and clear them out occasionally. I know I need to do that with the values from tuning the Sigma 150-600mm.
In the past, this has been a manual process. You’d set up a target, take a picture, and decide whether you were back-focusing (your actual focus-point is behind where you wanted it to be) or front-focusing (just the opposite of back-focusing). Then, you’d dial in a setting that reflected this, and compare the images to see if it was better or worse. Repeat until you found a value you liked, or until you gouged out both of your eyes with a used grapefruit spoon.
However, there is now a company in the UK called Reikan who makes a wonderful piece of software called FoCal.
Double disclaimer: Reikan did not contact any member of the Disney Photography Blog and ask us to write this review. We were not provided with a free piece of software, and we are not compensated in any manner by Reikan or any company because of this review. Got it? Good.
I hate aiming the camera at the target. It must be aimed just-so, and I always tend to overshoot when adjusting the ballhead on my tripod. It also likely doesn’t help that most of the lenses I’ve calibrated recently are super-telephotos, and so I’m halfway across my house, trying to aim at a 2.5 inch center, with a heavy lens-and-camera combination.
That’s the hardest bit. FoCal will tell you when it is happy about your aim, and from there, does the vast majority of the work for you. Frankly, on a Canon, it likely does all the work for you. It takes pictures, changes the AFMA automatically, compares the shots, and repeats until it dials in the sharpest, most accurate possible autofocus value. If you’re shooting a Nikon, it’s a little bit more user-interactive. FoCal still takes pictures for you, and it still compares them for you, but you’ll have to adjust the AF Fine-Tune value on your own. Be gentle when you do, because if you nudge the camera off the target-point, your comparison data will be useless and you’ll have to start over.
After about 5 minutes of actual work, FoCal said it was done. It gave me a new value, and a lovely set of charts to go with them. I set that value in my AF Fine-Tune menu, and was ready to go for a day of shooting. There is also the option to Save Reports of what your lens correction looked like. I’ve attached, via links at the bottom of this review, those reports from the Sigma 150-600mm and the Nikon 200-500mm so you can see a little bit more of the data that FoCal can produce for you.
This is software I highly recommend, for anybody who is serious about getting the absolute most out of their camera and lenses. Whenever I get a new lens, the first thing I do is calibrate it. I’ll never miss another shot because my lens doesn’t understand what my camera body means by “in focus.”