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abhorred
11th of June 2005 (Sat), 18:14
Playing with new XT and did a sky test, Is this bad for a new DSLR?

50mm 36 aperture

not the lens - same pattern on 50 1.8 and kit

I'd hate to mess with my sensor right off - scary.

arpi
11th of June 2005 (Sat), 18:55
that looks like a lot of dirt (assuming the dirt is inside the camera). I could understand one dot but not so many. you may be holding someone elses return. If it were me, I would try to return it.

CyberPet
11th of June 2005 (Sat), 19:24
Acutally, that's not bad... you should have seen mine before I cleaned it. Now it looks closer to yours... the dust specks are not noticable if you shoot "normal", i.e. not with high aperture numbers (small openings).

summerwind4
11th of June 2005 (Sat), 19:30
looks like Canon "factory installed dust"...........i had some on my 20D, but it was like 2 spots that showed in f/22 shots. taking the image even further into photoshop and then traumatizing it with "levels" revealed a few more spots. i blew it out and the worst dust bunnies were gone. however, even after i did the levels on the photo, it did not look as bad as the one you posted.
then again, f/36 is going to show probably every last speck. try blowing it out and then see what it looks like.
like CyberPet said, if you shoot normal apertures (f/8 or so) you won't see even the ones you have right now.

abhorred
11th of June 2005 (Sat), 20:55
thanks

stress lowered

moving on!

Leorooster
11th of June 2005 (Sat), 21:57
I think it's not that bad. You should have seen mine. I don't think the dust would show up at a hight aperture. I would try to blow the dust away before I return it because chances are you would get some dust no matter what.

hmhm
12th of June 2005 (Sun), 08:24
Yeah, factory-installed dust is pretty common, don't jump to conclusions about getting somebody else's return.

Every sensor has dust. If you clean it very well, it will just have less dust... for a while.

The practical definition of "dusty" is when dust is apparent on your "normal" shots in such quantity that it's easier to clean the sensor than it is to clone out the specks. Note that, for most of us, shooting a clear sky at f/22 is not a normal shot, and neither is jumping through hoops of fire in Photoshop to crank up the contrast and bring previously imperceptible specks into view.

Don't be afraid to clean your sensor, but make it an "as seldom as necessary" task, and assess "necessary" based on your typical usage (e.g. typical aperture, typical presence of featureless, smooth background).
-harry

summerwind4
12th of June 2005 (Sun), 09:51
Yeah, factory-installed dust is pretty common, don't jump to conclusions about getting somebody else's return.

Every sensor has dust. If you clean it very well, it will just have less dust... for a while.

The practical definition of "dusty" is when dust is apparent on your "normal" shots in such quantity that it's easier to clean the sensor than it is to clone out the specks. Note that, for most of us, shooting a clear sky at f/22 is not a normal shot, and neither is jumping through hoops of fire in Photoshop to crank up the contrast and bring previously imperceptible specks into view.

Don't be afraid to clean your sensor, but make it an "as seldom as necessary" task, and assess "necessary" based on your typical usage (e.g. typical aperture, typical presence of featureless, smooth background).
-harry

hey now:rolleyes: my only deal with levels in photoshop is to see what one really has to deal with. i strongly suggest NOT to do it. but when you want to do a sensor slean using the "wet" method, then using PS and levels is an aid to finding all the little buggers.