gilbouk
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- Name
- Gil
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Hi GIL
at what length did you fine tune your 200-500 ? did you fine tune using the camera fine tune program? or a 3rd party
i also have the d500 and 200-500 and find its a great combo
I had a ruler propped up with a shallow incline - and I made sure my camera was stationary on a tripod perpendicular to the ruler and at the shortest focusing distance from the lens (ie the ruler as close to the lens with focus still being achievable with AF at 500mm). Through the viewfinder I took note of the number on the ruler that was in the centre focus spot. Took a series of test shots at f5.6 with fine tuning set at -10, 0 and +10 (manually defocusing before using AF to focus with each setting)
Compared the photos. At first I thought there was no difference between the pictures but realised I wasn't looking for 1 sharp number - but to be able to see how far in front and behind the number on the ruler the 'in focus' area was. So say you were focusing on the 15cm marker on the ruler - and in first picture you saw that everything from 12 to 16 was in focus, then on that particular fine tune setting you were front focusing - as more that was in focus before the 15 was in focus compared to after. Likewise if you got a result where it was between 14 and 18 that was in focus then you would know that the lens was back focusing on that particular fine tune setting.
Then by methodically taking note and adjusting the fine tuning setting accordingly I was able to work out the setting that would give me a result of 13cm to 17cm all being in focus (an equal distance in front and behind the 15). At this stage I new that I had the correct fine tune setting for that lens.
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500_4063 - Version 2
500_4060 - Version 2
hollowell 5
hollowell 4
hollowell 2
hollowell 1
barn 2
barn 1
barn 3
Mr Magoo
Juvenile Grey Heron
Edinburgh-20
bwc-24
Summernats-30
Summernats-18
It was focusing and it seemed to focus a bit quicker than the previous 70-300mm. That was getting a bit old though, 8 years looking back to when I got it. 



woody
woody 2
distant buzz and kes
flying heron 2