Focus Problems

nickolas thurston · Apr 15, 2018

Canon EOS 7D Mark II
EF500mm f/4L IS USM +1.4x
ƒ/9
700mm
1/1000s
ISO 500
Flash not fired
Sat, 14 April 2018 5:05 AM

I took these today and thought they were in focus at the time. Any suggestions do I need to micro adjust? I had the lens propped up on a rock, shot with a 7d2 500mm f4 and 1.4 tc.
f/9 1/1000 sec iso 500 700mm

any suggestions appreciated!
thank you

Daniel Cadieux · Apr 15, 2018

Was focus point on the eye? The rock seems to be sharper, but very hard to tell for sure at this size. Can you post a similar close up crop of the rock?

nickolas thurston · Apr 15, 2018

Here is the 100% crop of the rock

Canon EOS 7D Mark II
EF500mm f/4L IS USM +1.4x
ƒ/9
700mm
1/1000s
ISO 500
Flash not fired
Sat, 14 April 2018 5:05 AM

Daniel Cadieux · Apr 16, 2018

As I suspected, the rock is much sharper than the sandpiper. There could be a number of factors, one being that your lens may be front-focussing and needing of micro adjustment. Are all your images coming out this way, or just once in a while? Was your focus point on the face?

nickolas thurston · Apr 16, 2018

Yea The focus point was on the eye, and yea most shots in the burst with the teleconverter come out that way. Without the tc I still have shots like this but never this bad. any recomendations for micro adjustment I was looking at lens align but its pricey. thanks for the help.

arash_hazeghi · Apr 16, 2018

this image shows clear motion blur, everything is soft, you need to use a faster shutter speed.

Ákos Lumnitzer · May 24, 2018

I agree with Arash. However, in time with practice you can get sharp images of static birds with even slower SS than 1/1000th!!

Daniel Cadieux · May 24, 2018

The sandpiper itself shows motion blur indeed, especially on the face I agree, but the image still looks front-focused on the rock, hence my suggestion.

Focus Problems

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