R7 focus stacking in camera

john80504 wrote:

I do a lot of focus bracketed work. The biggest problem you all will have depending on your lens is focus breathing. As the focus distance changes, some lens tend to appear to zoom (including primes). Also as the focal point moves further away nearby objects such as tree branches etc. bloom and tend to cover areas you don't want them too. Using Helicon Focus to process the RAW images one can do some correction of this blooming. With the in camera processing I doubt the camera's firmware can make those kind of adjustments.

This is an focus stacked image shot bracketed with Canon R5, Canon 70-200mm lens at 200mm, f/11, 1/125th sec. exposure, ISO 400. It is made up of 878 Focus Bracketed images processed to yield 114 individual Focus Stacked images, 6 rows x 19 columns 30% overlap in portrait orientation.

The original image is: 2.278 Gaga-pixels, 32,282 x 70,569 pixels, 107" x 235" 300 PPI https://abbascreationsphotography.com/GC_Moonrise.htm

The sort of image in the OP will not have much effect of focus breathing, as it is over a relatively (in this case very) short distance, and at a very long focal length (in this case 1600mm effective focal length). But yes it can be a problem in landscape photography with near and far objects. I don’t know whether the in-camera compositing routine in the R7 specifically corrects for this, but all the results I’ve seen from the R7 here and elsewhere, and from Olympus cameras, are so well aligned it seems likely that they do. My own experience is mostly with the R5 for macro, merging in DPP.  For landscape I bracket manually, and merge the images in Affinity, which does a much better job than Photoshop/Lightroom. But it looks much easier to do this in-camera, and as the RAWs are all saved, you can always re-do it on your computer.