This is just a rundown of where I stand with my copy of the 7DII which I've had for 5 weeks now. Based on posts related to focus issues I started trying to determine if I had any of the posted issues. To date it doesn't look like it. At least not as far as inconsistent focus is concerned.
If it matters, I usually have the camera set to Av, one shot focus, centre point and continuous shooting at 5 fps and ISO 100 or 200. These settings usually only change when moving targets are involved or low light.
To start, the first few shots I took were indoors with the 70-300L and resulted in auto ISO speeds of 6400. The shots were fine for that ISO setting. No apparent focus issues. An outing with the tamron 150-600, AI servo, the centre goup of AF points active and a landing jet produced soft images. First suspect was user error.
Shortly after that I started experiment with AFMA and dot tune. A subsequent outdoor excursion with the 70-300L produced acceptable shots but due to subject matter I was not able to determine precise focus operation although the shots were fine when viewed at 100%.
For the past few weeks I have been concentrating my efforts on the tamron. I did my best using the dot tune method indoors to adjust the lens. Subsequent tests in bright sunlight and a distance of about 120 feet gave me slightly different numbers for AFMA. A quick outing today and I've revised the numbers again but have yet to see really sharp images at 100%
It's all getting too confusing. Too many conflicting statements, suggestions and comments such as:
sensor pixel density will mean pictures will not look sharp when viewed at 100% but most shots posted related to focus sharpness are 100% crops; even most my bad shots look ok at 50%
sensor pixel density will make the resolution of your lenses a factor in picture quality; sounds reasonable
correct AFMA distance - is it MFD, 25x, 50x
higher F-stop values (as in using F8 instead of F4) will negate the effects of AFMA; this didn't have any positive effect on tests today as far as image quality goes
This has all been a great learning experience but at the end of the day I bought this camera to take pictures and not just test pictures. Sooo, my next outing I will be concentrating on taking pictures that aren't necessarily test pictures. As weather conditions prevent me taking large numbers of pictures outside (-43 C today with the wind chill) it will be easy to play with the AFMA settings in a controlled manner and still be able to monitor adjustment effects while still enjoying what this camera has to offer.
RE AFMA: current tamron settings are +4 on the wide end and +4 on the long end so I have a folder appropriated named w+4-t+4 to place the pics. Will create another folder similarly named for the next AFMA settings so over a period of time I can review the effects of AFMA in real world shooting conditions and not just some artificial test shots.
Of course I will continue to follow the focus threads and others but for me it is time to do something besides read about issues.
To those with real issues - good luck
To all the people ready to help - thanks
To everyone with no problems - how come you aren't out taking pictures
Rod




