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	Username   Password FM Forum Rules Canon SLRs, primes, and zooms lenses reviews FM Forums | Canon-mount SLRs | Join Upload & Sell    Search Used end    Archive 2009 · Computer controlled focus, API?

floris Offline Dedicated FM Upload & Sell: On p.1 #1 · Computer controlled focus, API? I was wondering if anyone knew whether it was possible to control the focus of an AF lens on one of the modern cameras like the 5D2. And, if so, is there an API such that I can control the focus from a programming language like C/python? Any help would be much appreciated, thanks! By control the focus I mean, I want to tell the lens what distance to focus at, or to literally just control the USM motors, whatever to that effect is possible. Aug 13, 2009 at 03:37 AM

nathanlake Offline Dedicated FM Upload & Sell: On p.1 #2 · Computer controlled focus, API? I don't know for sure, but Canon is not exactly third-party friendly. I really doubt they would publically document how to control their cameras/lenses. Aug 13, 2009 at 03:40 AM

kewlcanon Online Dedicated FM Upload & Sell: On p.1 #3 · Computer controlled focus, API? Maybe checkout this site: http://magiclantern.wikia.com/wiki/Magic_Lantern_Firmware_Wiki They've been tinkering with 5D2. Aug 13, 2009 at 03:42 AM

stanj Offline Dedicated FM Upload & Sell: On p.1 #4 · Computer controlled focus, API? Yes, this can be done. You need to register as a developer with Canon and you can get a Mac/PC SDK. It's pretty poorly architected but it works. I use it for night exposure control and a buddy at work uses it for focus control (helican focus or whatever) to get more DOF for macro. You write code in C / ObjC on the Mac side - I don't know / care for PC Aug 13, 2009 at 05:05 AM

floris Offline Dedicated FM Upload & Sell: On p.1 #5 · Computer controlled focus, API? Awesome, thanks guys! Aug 13, 2009 at 06:53 PM

BrianO Offline Dedicated FM Upload & Sell: On p.1 #6 · Computer controlled focus, API? kewlcanon already mentioned Magic Lantern, but I thought you might find this link particularly useful: http://magiclantern.wikia.com/wiki/Focus Aug 14, 2009 at 08:18 AM

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