Re: Equipment for extreme macro
3D Gunner wrote:
ThrillaMozilla wrote:
I wouldn't make that assumption. I've never tried extreme macro, but do you think 999 steps is enough?
999 steps on which interval? 999 one micron steps for 1mm depth, by example?
Exactly!
@ThrillaMozilla
Pay attention to what I actually wrote. I said "not fine enough steps", NOT "not enough steps". Not fine enough steps is a different issue from how many steps (though the issues are connected). And the former is what I questioned -- for any brand.
At extreme magnifications, the focus increment per step needs to be VERY fine. (And that in turn also means you will need VERY MANY steps, but that's a different issue).
When Jim Kasson (a careful, helpful, and well-respected participant here at DPR, as well as a moderator for the DPR medium format forum) says something, there's a very high likelihood that he's right. And he has examined focus bracketing in the Z7 (among others -- though not Canon, as far as I know) and said that he thinks that "the minimum step size is too large for critical work". I don't know whether that has been improved via a firmware update, or in the Z7ii. Nor do I know about how it performs on any particular Canon camera with that feature -- which should not be assumed to be exactly the way that other Canon cameras with the feature implement it.
https://blog.kasson.com/gfx-50s/how-focus-bracketing-systems-work/
https://blog.kasson.com/gfx-100/quantifying-the-fuji-gfx-100-focus-bracket-step-size/
https://blog.kasson.com/nikon-z6-7/nikon-z7-focus-shift-shooting/