Possible Problem Beginning With My 300D? — Aviation Photography Forum

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Possible Problem Beginning With My 300D?

Dazed767 From United States of America, joined May 1999, 5447 posts, RR: 53
Posted (8 years 4 months 2 weeks 2 days 21 hours ago) and read 1947 times:

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.

7 replies: All unread, jump to last

Wietse From Netherlands, joined Oct 2001, 3809 posts, RR: 57
Reply 1, posted (8 years 4 months 2 weeks 2 days 20 hours ago) and read 1922 times:

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 From Sweden, joined Dec 2000, 2043 posts, RR: 52
Reply 2, posted (8 years 4 months 2 weeks 2 days 20 hours ago) and read 1921 times:

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

Wietse was faster!

[Edited 2005-01-06 20:14:47]

AeroPresentation - Airline DVD's filmed in High Definition

Sukhoi From Sweden, joined May 2006, 371 posts, RR: 8
Reply 3, posted (8 years 4 months 2 weeks 2 days 17 hours ago) and read 1854 times:

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

Fiveholer From United States of America, joined Jun 1999, 1009 posts, RR: 12
Reply 4, posted (8 years 4 months 2 weeks 2 days 17 hours ago) and read 1848 times:

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 From United States of America, joined May 1999, 5447 posts, RR: 53
Reply 5, posted (8 years 4 months 2 weeks 2 days 15 hours ago) and read 1819 times:

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

Justin Smile

DeVoDaVe From United States of America, joined May 2003, 2 posts, RR: 0
Reply 6, posted (8 years 4 months 2 weeks 2 days 15 hours ago) and read 1818 times:

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 From Netherlands, joined Oct 2001, 3809 posts, RR: 57
Reply 7, posted (8 years 4 months 2 weeks 2 days 15 hours ago) and read 1816 times:

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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