Hi Guys,
Just wanting to check whether this issue is common to this lens or if I have a damaged/bad copy.
My issue really started showing up once I upgraded to the D850 from the D810, It was occasionally noticeable with the D810 but not as much, I assume due to the lesser detail.
It's primarily showing up when shooting at F2.8-5.6, and almost completely gone at F8.
Here is an example from Vivid in Sydney the other night: 1600 ISO and unedited but you get the idea.
Full size -
100% crop of focused area:
100% crop of right hand side
100% crop of left side
100% crop of bottom (acceptable)
And here is a 100% crop of a similar shot at F8 (edited) it's not perfect but it's pretty good.
Is it just the lens or is it my copy? It's a few years old now so no chance of swapping it out. Tempted to get a Prime but I really do use most of the range from 15-30 regularly, plus I have a Lucroit adapter for this lens to fit my 165mm filters which will be another expense if I swap...
Can it be entirely resolved by only shooting at F8 - F12? It's generally what I do but low light gets sketchy.
EDIT:
Here is an example at F5, ISO 64, 15 Sec exposure.
Middle 100%
Right 100%
Left 100% - You can see the gradient from in focus to out here from right to left. This should all be hyperfocal?