Camera Labs

Have any of you 40D owners noticed any "bad pixels" (e.g. dead pixels or hot pixels)? A friend of mine found a link at dpreview (.http://forums.dpreview.com/forums/read. ... e=25646166). I also noticed this on some recent Nikon D3 pics (http://www.robgalbraith.com/bins/multi_ ... -8745-9153). But I digress...Seeing red dots. One 40D owner ended up swapping his for a Sony A700.

Just wondered if this isn't just an isolated problem with the odd 40D. And I was told that all cameras have "bad pixels". Just to a very small degree. Just not noticeably so. True?

Thanks.

I'm about to choose from between the 40D, A700 and the upcoming D300.

Haven't found anything like that on mine yet.... how about you Bob

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Roy
EOS 350D, 40D + BG-E2N, EF 24-105mm f/4 L IS USM, EF 100mm f/2.8 Macro USM, EF 100-400 f/4.5-5.6 L IS USM, 430 EX Speedlite




My Fotopic

Yes and No.

For normal photography I haven't seen any problems at all. Astrophotography is a different issue as you will always get hot (rather than dead) pixels but they are pretty easily dealt with.

Bob.

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OM-D E-M5 + ED 12-50mm, H-PS14042E, H-F007014E, L-RS014150E, M.ZUIKO DIGITAL 45mm 1:1.8.
Gitzo GT1541T, Arca-Swiss Z1 DP ball-head.
Astrophotography: TEC 140 'scope, FLI ML16803 camera, ASA DDM60 Pro mount.

Ah well... won't affect me then too bl***y cold outside for me after dark

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Roy
EOS 350D, 40D + BG-E2N, EF 24-105mm f/4 L IS USM, EF 100mm f/2.8 Macro USM, EF 100-400 f/4.5-5.6 L IS USM, 430 EX Speedlite




My Fotopic

Thanks for your replies guys. In most cases it doesn't sound like something to be concerned about. I heard it's during long exposures that you might encounter them.

Having said that how would you deal with them Bob? Photoshop?

As I only see them with astrophotography the software I use (IRIS) has routines to detect and remove them using the Dark Frames (same exposure but with the lens cap on). I wouldn't want to overstate the problem however. The following "clickable" picture is the JPEG as delivered by the camera with the only adjustment being to tweak the Levels to darken the sky. This was a three minute exposure at ISO 1250. Judge for yourself how much of a real issue they are when not pixel peeping.



Not having seen the problem otherwise I can't really comment. Maybe the Photoshop Despeckle filter would work but that's guesswork on my part.

Bob.

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OM-D E-M5 + ED 12-50mm, H-PS14042E, H-F007014E, L-RS014150E, M.ZUIKO DIGITAL 45mm 1:1.8.
Gitzo GT1541T, Arca-Swiss Z1 DP ball-head.
Astrophotography: TEC 140 'scope, FLI ML16803 camera, ASA DDM60 Pro mount.

Ok thanks Bob. But this isn't a big deal any how. And in most cases isn't an issue for most 40D users any how. Never seen any bad pixels in 99% of the sample pictures I've seen as I've said.

Sorry, I added the picture as an afterthought and didn't hit he final Submit until after your reply.

Bob.

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OM-D E-M5 + ED 12-50mm, H-PS14042E, H-F007014E, L-RS014150E, M.ZUIKO DIGITAL 45mm 1:1.8.
Gitzo GT1541T, Arca-Swiss Z1 DP ball-head.
Astrophotography: TEC 140 'scope, FLI ML16803 camera, ASA DDM60 Pro mount.

I noticed after I posted my reply. Boy do you have a serious bad pixel (white dots) problem. Better have your 40D looked at ASAP!!

I wondered what they were!

Bob.

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OM-D E-M5 + ED 12-50mm, H-PS14042E, H-F007014E, L-RS014150E, M.ZUIKO DIGITAL 45mm 1:1.8.
Gitzo GT1541T, Arca-Swiss Z1 DP ball-head.
Astrophotography: TEC 140 'scope, FLI ML16803 camera, ASA DDM60 Pro mount.

Hello everyone,
Just throwing in more data for statistics,
Been using the 40D since the end of September and had taken quite a lot of shots with relatively long exposures (couple of seconds) and I have not noticed any dead pixels and I know when I see one because all my laptop screens had one of the annoying things!

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Canon EOS 40D, EF-S 17-85mm f/4-5.6 IS USM, EF 100mm f/2,8 Macro, EF 50mm f/1,8 II and some other stuff.
Flickr!

Thanks for posting. Good to know. The 40D is still on my shortlist. Right after the Nikon D300 and before the Sony A700.

I've always liked the Canon system (camera/lens/flash/accessories). As good (moreless) as a Nikon system. Sony has a ways to go IMHO.

You're welcome.
If I about to choose to system, I'd be stuck between the D200 and the D40 as well.
Apart from all the technical aspects, I just find the Sony A700 to be very..um..ugly. It somehow looks like an unfinished prototype, like those flash cars you see on autoshows. Bu I'm sure it's a great camera.
That D300 though, that is going to be a serious piece of kit.

This probably belongs to the Nikon forum but just for asking,
Will it (D300) have the full remote shooting (from a PC) mode like the 40D? For me, that is much more important than something like an HDMI output.

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Canon EOS 40D, EF-S 17-85mm f/4-5.6 IS USM, EF 100mm f/2,8 Macro, EF 50mm f/1,8 II and some other stuff.
Flickr!

Regarding the D300...yes it does support WiFi wireless file transfer. Networked even.

And I too find the A700 very ugly. Looks like a child's toy. And if you view the video clip here at Cameralbs for the Sony DT lens you'll hear how LOUD and chep sounding the AF in-camera motor sounds. And the cheap sounding shutter release sound. Matters to me. One among many reasons why I prefer getting either the D300 or 40D. They are built much better inside and out.

Just waiting for the test reports for the D300. Which will include comparisons to the 40D and A700.

I totally see what you mean. After upgrading to 40D from 350, I couldn't wipe the smile from my face listening to the sound of it for days!

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Canon EOS 40D, EF-S 17-85mm f/4-5.6 IS USM, EF 100mm f/2,8 Macro, EF 50mm f/1,8 II and some other stuff.
Flickr!