Author Topic: 5D classic focus calibration  (Read 805 times)

adamszulc

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5D classic focus calibration
« on: January 31, 2021, 11:01:52 PM »
Hi, this is my first post so I want to say hello :)

I have a 5D classic, awesome camera.
Unfortenutly It has backfocus.

Is there any possible to calibrate this on my own? Maybe magic lantern has this option or someone working on this?

Walter Schulz

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Re: 5D classic focus calibration
« Reply #1 on: February 01, 2021, 06:22:35 AM »
I suppose you don't own such a thing: https://en.wikipedia.org/wiki/Indicator_(distance_amplifying_instrument)
but that's what you need for mechanical calibration.

Sapporo

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adamszulc

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Re: 5D classic focus calibration
« Reply #3 on: February 01, 2021, 09:29:40 PM »
https://www.spt.info/sptstore.php/canon-eos-5d/software-canon-eos-5d-advanced

Nice, thanks for that link.


I suppose you don't own

Thanks for fast reply.
Yes, I have this equipment! But how can I calibrate camera in conjunction with this? Where I can find instruction or something?


Walter Schulz

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Re: 5D classic focus calibration
« Reply #4 on: February 04, 2021, 06:54:35 PM »
Thanks for fast reply.
Yes, I have this equipment! But how can I calibrate camera in conjunction with this? Where I can find instruction or something?

Sorry, unable to find the link right now!

Walter Schulz

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Re: 5D classic focus calibration
« Reply #5 on: February 04, 2021, 07:24:16 PM »
Well, I remember some things ...

You may have one of these errors:
Flange distance wrong = distance between sensor plane and mount incorrect. This is where you have to work with shims and said tool.
AF sensor misaligned = Flange distance may be correct but phase AF module (bottom of your cam mount) is in the wrong position.

Are you able to focus manually to infinity with tele and wide angle lenses?

adamszulc

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Re: 5D classic focus calibration
« Reply #6 on: February 05, 2021, 04:21:45 PM »
Are you able to focus manually to infinity with tele and wide angle lenses?

Thanks for your answer.
Yes I can focus to infinity.

My backfocus is not so big but definitely it noticeable on pictures.


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