Software Feature Request for R3 with Focus Bracketing - Calculated shot and steps

[mHeston]

This shows how old I am.  30+ years ago I owned a Canon camera I could focus on a near object, press the button, then focus on the far object I want in focus and the camera would calculate the needed f/stop and focus point.

What I want now is a variation of that. 

Focus on the near point - focus on the far point - and have the camera calculate the number of shots to take, and the focus increment - based on the camera body, f/stop, and focal length of the lens.  Come On Canon - you've got all the numbers already all you have to do is run the math for us.  You were doing basically the same thing 30+ years ago, you can certainly manage it now.

As an added bonus you could add a field that allows us to select a % increase in shots.  So say the camera calculates that creating this focus stack will require 13 shots with a focus increment of 4... then allow us to add a percentage above or below the calculated numbers based on our experience and post-processing software and knowledge.

[mHeston]

Yes, that's the feature.  I didn't own that model, but yes. 
Thanks for finding that.

[mHeston]

I think you are making it more complicated than it is.  
Camera prompts for near focus point - photographer puts focus point on near subject and focuses.
Camera prompts for far subject - photographer puts focus point... Yada yada
Camera now knows, distance to near point, distance to far point, f/stop, DOF based on lens and f stop, and can calculate the number of DOF shots needed to create a focus stack.  

It's really quiet simple math based on known parameters.

[FloridaDrafter]

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@kvbarkley wrote:

It was the "ADep" mode From the XSi

<SNIP IMAGE>

I guess the OP was the only one that used it.

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LOL! Thank you. I have that camera, and still use it. It sets beside my La-Z-Boy with an EF 100mm f/2.8 IS USM Macro lens attached. I have never used A-DEP (until today).

In A-DEP, the camera adjusts your aperture to include all of the registered (green) focus points. It works OK, but you are limited to shooting in only the best (well lit) conditions. ISO is the only thing you can control. It would probably work well for group photos at a distance.

I just took this and got a screen grab from DPP4 so you can see the focus points. It is in our window with bright sun. EOS XSi in A-DEP mode, EF 100mm f/2.8 Macro IS USM, 1/90th, f/11, ISO 400. Hand held 🙂

Canon EOS XSi A-DEP Mode

Newton