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Aperture Problems with 800si
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mugen View Drop Down
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Posts: 23 		Post Options Post Options   Quote mugen Quote  Post ReplyReply Direct Link To This Post Topic: Aperture Problems with 800si
    Posted: 10 November 2009 at 20:47
First Hi, and sorry for my bad English.

I bought a used Minolta 800si today,
but I have some aperture problems

When I attach the Minolta 50mm 1.4 the aperture is
not wide open and stays about f2.4,
changing aperture value and pressing the DOF preview
or the shutter i see that the aperture is not working correctly.

With 17-35 lens the aperture is even more closed
and the view through the viewfinder is dark.

The lever at the iris ring in the camera is 4-5mm lower
than my Sony A700, when I push it up he returns.
If I push it with finger down he moves 4-5mm and stops

Can anyone help?
 



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Bob J View Drop Down
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Posts: 27166 		Post Options Post Options   Quote Bob J Quote  Post ReplyReply Direct Link To This Post Posted: 10 November 2009 at 20:53
Can you post a picture of the open mouth of the lens mount - I can then compare to mine and let you know if there are differences...
RBJ ~ Moderation on Dyxum
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mugen View Drop Down
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Posts: 23 		Post Options Post Options   Quote mugen Quote  Post ReplyReply Direct Link To This Post Posted: 10 November 2009 at 21:06


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Bob J View Drop Down
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Posts: 27166 		Post Options Post Options   Quote Bob J Quote  Post ReplyReply Direct Link To This Post Posted: 11 November 2009 at 00:00
The actuator ring appears to be slightly clock-wise of where it should be - the little cut-out to the right of the contact pins should be hard-up against them. My guess is that it has been taken apart and not put together quite right...

Bob
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mugen View Drop Down
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Posts: 23 		Post Options Post Options   Quote mugen Quote  Post ReplyReply Direct Link To This Post Posted: 11 November 2009 at 23:25
I fixed it
With removed front plastic cover and removed
iris ring and attached lens was able to see
that the little red wheel is moving properly when I change
aperture and press DOF Preview and after that returns in one position.
After that with the iris ring in place and a few synchronization attempts now works perfectly



Edited by mugen - 13 November 2009 at 23:55
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Bob J View Drop Down
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Posts: 27166 		Post Options Post Options   Quote Bob J Quote  Post ReplyReply Direct Link To This Post Posted: 12 November 2009 at 00:13
Result!

Thanks for the picture, which I'm sure will be useful for others.

I really like the 800si, but it is an ugly camera - Surprise surprise, it is still not too much of a looker when stripped down.. but it does perform very well.

BOb
RBJ ~ Moderation on Dyxum
 



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