Trying to get FoCal run on my lenses, so many hurdles, my laptop won't run it, borrowed hers while she was out, I finally got the laptop to run it, only took 90 mins to get there! Not a FoCal problem but issues with laptop on the network for licence retrieval! Next issue not light enough, not enough table lamps to bring the light up!
We sat waiting for the ferry home after a day out Saturday, I took about 2 dozen pics of gulls for practice, I think I have one keeper that is reasonably crisp, though I don't think that one is even good enough to post!
Regarding the calibration of your lens, I either read it on lens rentals or here that focus distance can have an effect on AFMA value, if they AFMA the lens in their lab at y feet and you use it at 4y feet or 1/4y feet it could have a significant effect on the value needed. I think Focal recommend 25x focal length or
whatever your main shooting distance is if you know it!
By the way that is a nice picture, taken on your mobile stump I guess.
Valvebounce, you and I are in the same boat. It just happened that I was left some inheritance and was able to pick up the 300, so of course that opened some extra possibilities for me. If you shoot lots then you have to get lucky at least part of the time. That's my situation.
Do not neglect checking out your AFMA situation, in real subject shots too. Just find a bird that sticks around and take many shots over the whole range of AFMA. It's pretty quick and easy. That'll give you more experience actually recognizing where focus is located and should tell you if it appears to be a major negative factor. DPP will display the focus point later as a reminder - a tripod may help. Others may not agree but there are targets out in the woods that are nearly as good as a chart, like a little branch stub on a sloping log.
I believe with my 6D that the focus plane using secondary points does not perfectly agree with the center point. This is showing up on full framed vertical close ups of my friend Downy. Anyone else found this to be true??
6D 300 2.8 3200th F4 ISO 640 AFMA at +12 (when Canon serviced it they set it at +4 ??)