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And the result?

Hi Paliswe, Evidently, according to the Exif, your experiments with 70-200mm and 24-200mm were taken under quite different conditions: different shutter speeds, different ISO, different shooting angles, and most importantly, different f/xx. Since you set f/2.8 for 70-200mm, you got very shallow...

When you use 24-200mm and 70-200mm with FL=200mm, it is NOT under the exact same conditions: you have to use a ZTF adaptor for 24-200mm and it could make a bigger DoF. Or you could set a different aperture that also affects DoF (f4-6.3 for 24-200mm; f2.8 for 70-200mm). Remember large aperture...

The special thing about my project is the main subject in the landscape scene is very very far (miles) away and some other object (e.g., clouds) is even beyond it. I need a 600mm lens to catch the scene. This is very different from Macro/close-up, even normal landscape scenes (DoF is not that...

In response/appreciation to Paliswe's post, give my thoughts on 2c: First, my bad if wrong I think for z cameras' settings of focus shifting, "focus step width" is related to the "depth of field" of the system. And the "DoF" is set by focal length, aperture, and subject distance. The "step...

Thanks, Fred.

I am sorry, Woody. I have messed up your thread here!

How do you get this number in EXIF? I couldn't find it in my Exif Viewer. Could you check my image posted above for the focusing distance? Thanks

Thanks for the details, Fred. So the device calculates the number of shots... will it tell you the number before starting shooting? I just want to know the shot number. Also, it seems to be uncertain that you will be able to "tap" a point that represents infinity. Yes, file size, not file...

Do you keep the original uncropped image? (need the idea of how you look it in VF or LV) Thanks

No, I do appreciate Fred's sharing of using CamRanger. With Z camera's built-in focus-shifting function, there shouldn't be much difference from using CamRanger with DSLR. As I mentioned, for landscape I prefer to stop shooting until reaches infinity.

Got it. I think this does not matter cause if FB affects my experiment much, the stacker would fail or render bad results.

That may well work for Macro. For landscape, I prefer the far point to be infinity, i.e., clouds without "pointing" it.

BTW is my Yosemite project realistic?

I haven't considered the possible focus breathing issue in my experiment. If this issue affects the focus shifting with the Sigma lens, how do you verify it in my experiment results? It seems that there are only prime T-S lenses, and no zoom lenses working on T-S. And all T-S lenses are MF, if...

Mind asking how far you were away from the bird?

Thanks, Fred. The Focus Step Calculator works more effectively and accurately for Canon's "focus increment" setting. But it contradicts Nikon's "focus step width" setting (see https://nps.nikonimaging.com/technical_solutions/d850_tips/useful/focus_stacking/ ). May need more experiments to...

My next project (when the weather turns and all view clears) is to shoot a Yosemite scene from far (miles) away (see below screenshots from Google Earth). 4X zoom (clearly see the Half Dome in view) Since the view is so far away, I plan to use Sigma 150-600mm lens to reach/catch the main...