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D850: Focus tuning UWA lens... 18mm/2.8

sc_john

Active member
Has anyone had success in focus tuning an 18mm/2.8 lens (Zeiss Milvus in this case) on a D850... or D5 or D500 for that matter. I have tried two samples, and could not get either to auto fine tune. I have successfully focus tuned a Nikon 20/1.8 G lens; so I am lost on why process doesn't work on Milvus 18/2.8. I also tried dot-tune method and that wasn't successful, either. TIA for any suggestions or comments.

John
 

Jack

Sr. Administrator
Staff member
Going from memory here, and I may be all wet, but I seem to recall reading somewhere that you need to manually enter an ID tag in the AF fine-tune menu for the lens before calibrating it.
 

Steen

Senior Subscriber Member
D850: Focus tuning UWA lens ... 18mm/2.8

(...) could not get either to auto fine tune (...)
For D500 I believe using "Auto Fine-Tuning" requires an autofocus lens.
For D500 it's p. 132 in the "Menu Guide" (not the User's Manual).
I don't know the relevant page number for D850.
 

sc_john

Active member
Jack,

Thanks, I will look into that. The Milvus is a chipped lens, so it shows-up in focus tuning as 18mm f/2.8. But, perhaps there is more info needed. A response on FM said that Fine Tune was only for AF lenses. I've tuned MF lenses before, at least I thought I did. Maybe it was just a happy coincidence.

Problem is that both copies of the Milvus 18/2.8 that I am testing show a notable difference in focus at distance of 12-15' between VF vs Live View. :banghead:

John
 

sc_john

Active member
Re: D850: Focus tuning UWA lens ... 18mm/2.8

For D500 I believe using "Auto Fine-Tuning" requires an autofocus lens.
For D500 it's p. 132 in the "Menu Guide" (not the User's Manual).
I don't know the relevant page number for D850.
Steen,

Thanks for your comments; I didn't see your post until after I responded to Jack. Relevant portion of D850 Menu Guide starts on p164, and states "AF lens" a number of times in describing the process. So, it looks like answer to my question is RTFMS...:facesmack:.

John
 
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