@Waddizzle wrote:
I never said it was not useful. Someone insisted every camera should have this feature. I simply asked why. I brought astrophotography as an example of a feature that not every camera has.
You are piling on to an argument that you know nothing about. I strongly suggest you read thorough the thread before you make anymore comments.. I pointed out that I liked the feature, and was interested in it. I just do not think that it needs to be included in EVERY camera sold
I did read through the entire thread, and not knowing you, or your history, your posts came across as hostile to the idea that ANY camera should have the feature, and insisted the OP should justify their interest in such a feature.
Most people would have assumed the OP had a valid reason for wanting it, and while it's certainly open to interpretation as to whether a camera needs that feature, your insistence that the OP explain whether they had used such a feature, or what the use of the feature provides over manual focus stacking, came across as antagonistic, at least to me.
Since I have actually used the feature, on a modern Canon camera, and appreciate it's convenience, I felt my opinion was relevant.
As for "piling on to an argument that you know nothing about", your first post in this thread mentioned "astrophotography focus stacking"-- which isn't even a thing.
AP uses stacking, not for focusing purposes, but to boost the signal to noise ratio in long exposures. Other than using multiple images to create a final image, it's a totally different concept.
Using it as a comparative feature is also questionable-- while there are functions in the "EOS 60Da" and "EOS Ra" cameras that benefit astrophotography such as better zoom in live-view (although the lack of a "red screen" mode in either camera is baffling), the primary difference between astro and non-astro cameras is the replacement of the built-in UV/IR filter with an Ha (Hydrogen Alpha wavelengths) sensitive filter (or no filter, and an Ha filter used externally).
As a result, an astrophotography camera is more difficult to use under normal conditions. From Canon's website:
*The EOS Ra is a dedicated camera for astrophotography subjects, and is not recommended for everyday photographic use.
Focus stacking, however, is essentially a software subroutine that can automatically shift the focus point by a fixed increment, and can be easily added to any camera that understands focus distance, f-stops, and apertures (ie, can do basic DoF calculations).
The actual combining of the images is done by third party software-- DPP, Affinity Photo, PhotoShop and even Gimp have this capability.
So, other than a couple hundred lines (if that) of code, and some configuration menus/variables, it costs effectively nothing, and has no impact on other functionality in the camera.
So far, the EOS Rp, 90D and M6 Mk II have this feature. The EOS R, Ra, and the M200, appear to be lacking, although the R was introduced before the Rp, which seems to be the first camera Canon has included focus bracketing in.
