Fast Simple on Site Microadjustment Methods

If your camera can microadjust you HAVE to read this!


Fast Simple on Site Microadjustment Methods

by Roger N. Clark http://www.clarkvision.com

"Lenses and DSLR cameras vary in their ability to accurately autofocus (AF). The calibration of the DSLR AF system can be off in certain conditions. Accurate AF is important if you image with fast lenses wide open, as is common in wildlife and astrophotography. AF calibration is less important in landscape and other photography where you stop down to f/8 and slower. There are really simple ways to check AF accuracy using microadjustment that is available on newer higher end cameras. On the net you can find exotic test targets and complex instructions requiring a laptop computer. Such setups are impractical for real world in the field situation situations, where one must calibrate for the conditions on site. Calibrating with exotic tools back home under different temperature conditions may not result in a good calibration that works on site. The methods described here require no software, or any setup. You can do it anywhere, anytime. I have done it from safari vehicles using a beanbag, on a tripod, and even checked calibration hand held. The only requirements are a DSLR with microadjustment capability and that has a live view mode, or with a second method without live view."


Read the entire article here: http://www.clarkvision.com/articles/microadjustment