The software walks you through the entire process for autofocus calibration in baby steps if you want it to. It has a lot more features and tests beyond the basic autofocus microadjustments, sure, but it's not at all confusing. I'm so glad I did, because none of the bad reviews I saw held up. Then earlier this year I saw someone mention it and was about to repeat some of the bad reviews I read before I caught myself and decided I needed to try it for myself before I bad mouth it without even knowing. I first heard about FoCal about a year ago but put off buying it because of the price for the Pro version (which is needed if you have lenses over 400mm) and some of the reviews I read about the software being confusing or difficult to connect. For a full list of all the changes in version 2.9, check out the news post on Reikan's website. The calibration software is also speeding up their capture and analysis methods so that these tests will overlap. Not all changes were under the hood, however, and FoCal has some UI improvements to show more information about the connected camera and even support for dark and light themes.įoCal 2.9 is also bringing 'faster, more reliable' communication for connected Canon cameras to Windows, something that Mac users received in a previous update. With zoom lenses treat each end of the zoom range as effectively different prime lenses, it’s worth reading the FAQ entry How do you calibrate zoom lenses? for more details.One of the main drives for the major software rewrite was to become compliant with future macOS updates for Apple computers that will require all apps to use 64-bit architecture. The page FoCal Target contains further useful information and explains why target distance is important and why the distance used does not need to be precisely measured in most cases. If users do wish to measure exactly the measurement should be from the camera sensor (usually marked on top of the camera). Measuring the target distance does not need to be exact, the Target Distance Tool provides a ‘ minimum recommended distance‘ not an absolute distance for calibration. Use the focal length listed on the lens itself as the focal length for the target distance tool.

You should ignore ‘ crop factor‘, a camera with smaller sensor size does not change the distance used for calibration.

It’s important to use a distance that will enable the lens to work well for a variety of distances not just the one picked for calibration.Įasiest way to determine a good target distance is the Target Distance Tool.

Target distance can be a little confusing at first, essentially the distance at which you calibrate can make a difference to the calibration result.

Reikan focal pro lens calibration