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Old 02-02-2019, 02:38 PM
assbutt94
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Leveling a Camera Sensor [5dmk3]

Hi guys, picking some brains yet again.

I've astromodded my 5d and noticed that the sensor is adjustable using 3 spring loaded screws and locating pins in order to "level" the sensor with the flange and focal plane.

Does anyone have any tips on re-adjusting this so Auto Focus works like it originally did and the field remains flat?
Alternatively if anyone knows someone who might provide this service I may be interested if I can afford it.

I was going to adjust it myself using a lens, switching between live view and the viewfinder until the center focus points between each focusing method is identical.
Then use opposing focal points to make sure the sensor is level left and right, up and down.
It seems like it will take quite a long time to readjust things constantly until it all levels out and live view and viewfinder focusing is identical.
A final test would be to have it on the back of a scope and check focus with APT's focus aid and a star to the edge of the FOV, then rotate the camera 180* and ensure the reading is the same, and then rotate 90, check, 180 and check.

I'd appreciate any help here, because at this point my plan is essentially to wing it
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Old 02-02-2019, 04:24 PM
xelasnave's Avatar
xelasnave
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Heck give it a go...then you will be the expert☺
Just be patient and chip away.
Alex
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Old 03-02-2019, 07:52 AM
JA
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Location: Melbourne, Australia
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Quote:
Originally Posted by assbutt94 View Post
Hi guys, picking some brains yet again.

I've astromodded my 5d and noticed that the sensor is adjustable using 3 spring loaded screws and locating pins in order to "level" the sensor with the flange and focal plane.

Does anyone have any tips on re-adjusting this so Auto Focus works like it originally did and the field remains flat?
Alternatively if anyone knows someone who might provide this service I may be interested if I can afford it.

I was going to adjust it myself using a lens, switching between live view and the viewfinder until the center focus points between each focusing method is identical.
Then use opposing focal points to make sure the sensor is level left and right, up and down.
It seems like it will take quite a long time to readjust things constantly until it all levels out and live view and viewfinder focusing is identical.
A final test would be to have it on the back of a scope and check focus with APT's focus aid and a star to the edge of the FOV, then rotate the camera 180* and ensure the reading is the same, and then rotate 90, check, 180 and check.

I'd appreciate any help here, because at this point my plan is essentially to wing it
Hi AB,

Whether you can easily regain visible light autofocus, will, I suspect, depend on the nature of your modification, i.e: whether the modification was:

1. Camera Internal UV/IR filter removed and NOT REPLACED with anything,
2. Camera Internal UV/IR filter removed and REPLACED with alternate (internal or external) widerband UV/IR filter,
3. Camera Internal UV/IR filter removed and REPLACED with clear glass of an appropriate specification, or
4. Other (?????)


Best
JA

Last edited by JA; 03-02-2019 at 08:04 AM.
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Old 03-02-2019, 08:02 AM
assbutt94
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Location: Sydney
Posts: 36
I've removed the both of the UV/IR filters and replaced with a piece of Clear glass from Astronomik.
I intend to purchase an OWB filter down the line so I can use the camera for daytime stuff again.

I might have a crack adjusting stuff today while I watch the Bathurst 12 hour
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