DOF of all GF lenses measured and compared to DOF calculators

Started 4 months ago | Discussions thread
ForumParentFirstPrevious
Flat view
JimKasson
MOD JimKasson Forum Pro • Posts: 35,273
DOF of all GF lenses measured and compared to DOF calculators
4

There is a body of opinion that somehow depth of field (DOF) calculators don't work for GFX cameras. The proponents of that school of thought say that it's not just a matter of picking the appropriate circle of confusion (CoC) diameter; it's more fundamental than that. Some of them cite publications by Zeiss that say that the lens aberrations affect the DOF performance of the lens, which is undeniably true, but may or may not be applicable in the case of the GF lenses, which are with some exceptions fairly well corrected.

It occured to me that I have in my current lens-testing protocol a means to measure the actual circles of confusion produced by the GF lenses on the GFX 100S as the subject is defocused, which would allow the actual DOF to be compared to the DOF predicted by geometric optics, upon which depth of field calculators are based.

Here are reports on all the GF lenses except the 50:

https://blog.kasson.com/the-last-word/actual-vs-calculated-depth-of-field-for-some-gf-lenses-on-the-gfx-100s/

https://blog.kasson.com/gfx-50s/actual-vs-calculated-depth-of-field-for-long-gf-lenses-on-the-gfx-100s/

And here are results for the 50:

Score one for geometric optics!

-- hide signature --
 JimKasson's gear list:JimKasson's gear list
Nikon Z7 Fujifilm GFX 100 Sony a7R IV Sony a9 II +1 more
ForumParentFirstPrevious
Flat view
ForumParentFirstPrevious
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow