I picked up a used 28-300mm L IS yesterday from a local Craigslist seller. It was dated in 2004, and purchased in 2006. It looks and operates like new.
I spent all morning doing a AFMA with my 5D MK III. This was just shooting the long railing on my deck, and checking longer distances. It appears that there is quite a bit of interaction of the AFMA settings for wide and Tele, so I also checked 135mm to see if it was possible to manipulate the settings to get 135mm perfect as well as 28 and 300.
At full aperture, the lens is not the sharpest I own, and not as sharp as the 35-350 I had last year. After adjusting AFMA, I tool some shots at f/8 and they were much sharper, of course. I'll try f/5.6 and 6.3 next.
I have a 70-200mm f/2.8 and a 100-400mmL, but this lens just seems
heavy! That could just be me.
I'll play with it for the next few weeks or months before I decide if I'll keep it or not, I like the idea of a super zoom, but I need to get consistently sharp images from it.
The spot AF on my 5D MK III is a improement, like my 7D, I can pick out a target in a tangle of brush and focus on it.
Both were with my 5D MK III 300mm ISO 125 f/8 The bird is approximately a 100% crop
