Dazed767
Topic Author
Posts: 4967
Joined: Tue May 18, 1999 11:55 am

Possible Problem Beginning With My 300D?

Fri Jan 07, 2005 3:57 am

I was taking photos with my 300D the other day (had a Sigma 17-35mm f/2.8 attached). In the middle of focusing, the view finder became dark, or very tinted, but then went away. It happened 2 times, but I could hear a small click when it would go away. Could this have something to do with my shutter (maybe coming down half way causing the somewhat dark view finder?). Anybody else have this problem before? Thanks.  Sad

Justin

It's been working fine since, and this was 4 days ago.
 
wietse
Posts: 3630
Joined: Thu Oct 18, 2001 12:49 am

RE: Possible Problem Beginning With My 300D?

Fri Jan 07, 2005 4:12 am

Justin,

The viewfinder cannot be part of the problem... The mirror reflects the light towards the eyepiece. The shutter is behind the mirror and therefore not in the direct path of the light. Even if it would close, open, or whatever, you wouldn't see it in the viewfinder.

My guess is that your sigma closed down its apperture. Perhaps you pressed the preview button? That would cause the viewfinder to go dark.
Wietse de Graaf
 
Jan Mogren
Posts: 2014
Joined: Tue Dec 26, 2000 2:47 am

RE: Possible Problem Beginning With My 300D?

Fri Jan 07, 2005 4:13 am

Sounds more like the aperture closed, like when you wanna check your dof.
/JM

Wietse was faster!

[Edited 2005-01-06 20:14:47]
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Sukhoi
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Joined: Thu Jun 01, 2006 3:03 am

RE: Possible Problem Beginning With My 300D?

Fri Jan 07, 2005 7:31 am

Could be a lens problem, I had that happen on one of my Sigma's on my S2 (RIP). Would only happen with that one particular lens.

Luckily when the S2 commited sucide, the lens had no choice as it was still attached  Wink/being sarcastic

Cheers

Paul
 
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Fiveholer
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Joined: Fri Jun 11, 1999 6:27 am

RE: Possible Problem Beginning With My 300D?

Fri Jan 07, 2005 7:38 am

Thats what it sounded like to me with the click, was the DOF preview button being triggered. Hope ya get it figured out.

Danny
Bring back Bethune!
 
Dazed767
Topic Author
Posts: 4967
Joined: Tue May 18, 1999 11:55 am

RE: Possible Problem Beginning With My 300D?

Fri Jan 07, 2005 9:27 am

Thanks for the info, I'll keep an eye on it.

Justin  Smile
 
DeVoDaVe
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Joined: Mon May 05, 2003 3:32 pm

RE: Possible Problem Beginning With My 300D?

Fri Jan 07, 2005 9:32 am

Justin,

I had the same problem with the same exact lens and determined that it was the aperature getting stuck closed. You can verify this by taking the lens off and looking through it to see of the aperature is open or closed.

The first time it happened, I was able to get it back to normal by switching lenses on my 10D. When I put the Sigma back on the camera, it worked. Everything was fine for many months after that until the problem happened again and I was unable to get the lens working at all.

My solution was to buy a Canon 17-40 f/4 L lens.

David
 
wietse
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Joined: Thu Oct 18, 2001 12:49 am

RE: Possible Problem Beginning With My 300D?

Fri Jan 07, 2005 9:36 am

Even so, this shouldn't happen. If the problem persists, I'd ship it back to Sigma for a replacement or a free repair.
Wietse de Graaf

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