5D2 Microadjust

Just picked up my 5D2. Looking through the manual, I must say Canon gives you some pretty lame instructions for microadjusting your lens. Anyways, I found a helpful method at digitalpicture.com on performing the microadjustment. However, for the 24-105L at what focal length should this be done? I'm figuring 50mm but should I test 3 different focal lengths and average them out? Any advice would be greatly appreciated. Thanks.

carloman wrote in post #7843282
Just picked up my 5D2. Looking through the manual, I must say Canon gives you some pretty lame instructions for microadjusting your lens. Anyways, I found a helpful method at digitalpicture.com on performing the microadjustment. However, for the 24-105L at what focal length should this be done? I'm figuring 50mm but should I test 3 different focal lengths and average them out? Any advice would be greatly appreciated. Thanks.

With any zoom lens there will rarely if ever be one adjustment that will be exact for every focal length. The best thing to do is to either select a focal length you work at the most or if you find yourself at one end more than another then test at a few focal length's and then take an average of those focal length's.

When I was shooting Nikon I had a lens that was frontfocusing at the short end and backfocusing at the long end. Unless I wanted to adjust for one particular focal length I had to compromise and just leave the AF at zero.

Personally, I use Lens Align Pro rather than printing focus charts or shooting brick walls, etc.

https://photography-on-the.net/forum/showthre​ad.php?t=686668
would be a good place to look