Neil B
Suspended / Banned
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I find the most critical is the 500 f4. Given that I tend to shoot with it at around 10-15 metres sometimes less a small error can be quite noticeable. DOF at f4 at 10 metres is 8-10 cms depending on what you use to calculate it so just 2-3 increments off in MAF will show up.
I check at 25 times focal length and then check the finished result at various distances afterwards.
One of the most useful bits that i use is a nest box made from a stranded rope. If the lens is off that shows it straight away.
Finger still hovering Neil?
Finger pressed Gaz, should be here in the morning