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Removing mirror box assembly

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#1 Jay Grevell

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Posted 19 January 2017 - 06:36 PM

Hey everyone. Has anybody had experience with removing the mirror box assembly in a canon 400D. It's a modified, cooled camera that I've been using for years but I've just built a new F4 scope and I'm experiencing bad vignetting from the mirror.

Removing the mirror and relying just on the internal shutter would be ideal.

Any help would be appreciated.

#2 SKYGZR

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Posted 19 January 2017 - 11:31 PM

DSLR modification yahoo group may be the best to find answers



#3 kd4pbs

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Posted 20 January 2017 - 10:26 AM

I did it to a 20D.
It was pretty much straight forward.
1) Locate mirror parts inside camera.

2) Remove them.

Edit:
Welcome to the forum!


Edited by kd4pbs, 20 January 2017 - 02:46 PM.


#4 sharkmelley

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Posted 20 January 2017 - 02:01 PM

This guy removed his mirror for the same reason as you i.e. mirror causing vignetting:

http://www.markshell...mirrorless.html

 

Mark



#5 kd4pbs

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Posted 20 January 2017 - 02:45 PM

While I was in there, I also removed everything that didn't need to be there... flash, prism, viewfinder optics, etc.  One hint though:  If you remove the autofocus sensor, the camera won't work any more, and you'll have to locate another used camera somewhere on the interwebs so that you can fix it. ;)



#6 Jay Grevell

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Posted 20 January 2017 - 05:46 PM

Sounds like it can be done fairly easily. Did you remove yours the same way as in the link. Cutting the hinges?

#7 kd4pbs

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Posted 23 January 2017 - 10:37 AM

No; I took the camera apart, since I knew I wanted to remove all of the other bits & pieces as well.
Another word of caution; that capacitor for the flash stores up some serious voltage.



#8 Eric(Belgium)

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Posted 01 February 2018 - 06:58 AM

While I was in there, I also removed everything that didn't need to be there... flash, prism, viewfinder optics, etc.  One hint though:  If you remove the autofocus sensor, the camera won't work any more, and you'll have to locate another used camera somewhere on the interwebs so that you can fix it. wink.gif

Hi,

 

is it possible also to remove aperture controller or entry mirror box ?

Have bought a Nikon D7100 with aperture is broken, I want to use it only for Astrophotografy.



#9 ccs_hello

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Posted 01 February 2018 - 07:44 AM

Nowadays, most of the mirror box-flip mirror actuator is also linked with the mechanical shutter (front + rear curtain) movement mechanism.

You don't want to disturb the shutter open/close mechanism since it is essential for one-shot photo snap (for a high quality picture.)

 

Many just remove the mirror from its carriage for the reason stated above.

 

Also, some camera models have position detectors to verify the proper mechanical movement.

If you removed parts that position sensor(s) need to detect, camera will report system error and refuse to work any further.

 

Bottom-line is you have to know what you are doing in the first place.

Generalized answer gets you the YMMV result.

 

{ direct answer to post #8...   No, you need mechanical shutter blades for still capture to work. You need to find the replacement parts.  }



#10 Eric(Belgium)

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Posted 01 February 2018 - 08:06 AM

Thank you, that's what I wanted to know.




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