Spots appearing due to dust on cmos sensor/filter

[anders_fredrickson]

has anyone had problems with spots appearing due to

dust/condensation when shooting high apertures (f22 and above). I

recommend any d60/d100 user take a white sheet of paper, as evenly

lit as possible. tripod mount a shot at f3.5 or f4, then take the

same shot but at f22 or f32. Any spots that appear at small aperture

are either on the cmos or filter.

 

I recently (today infact), took my d60 to be cleaned at Canon

factory service in Irvine. My cmos sensor was completely clear, but

apparently dust had settled behind the filter element (which meant I

couldn't clean it myself). They cleaned it within 2 hours. Good news

is all but one of the old spots was gone. Bad news is in addition to

one of the existing spots, there were now about 5-6 new ones. Now I

must go back to Irvine and request another cleaning (fortunately

this is covered under warranty).

 

Any comments/experiences appreciated.

[dietrich_floeter]

I am seeing pixel sized white spots surrounded by a ring of medium density pixels. I assumed this was a sign of bad apreas on the CMOS but could this indeed be dust instead?

[dave_nitsche]

Sounds more like a pixel/cmos issue than dust. Dust is usually very non-defined and soft and dark. Just my experience. I clean my sensor once ever two weeks. I have one of those Ear squeegies that I just blow it off with. I very rarely shoot so closed down and when I do, if there are any dust spots I just clone em in PS. There haven't been any real bad ones yet that have ruined images, thank god... Dave

[anders_fredrickson]

to Dietrich, try going through the steps canon lays out for cleaning the cmos sensor. I had the same problem where I thought I had a bad cmos, but the camera was only 2-3 weeks old. Apparently it was a really small piece of dust.

 

the problem I had, though, was that dust and/or condensation got lodged behind the filter, so it was NOT possible to clean it with a blower. My guess is many people are not aware of this, because they either shoot at a large aperture, or are shooting varied backgrounds. I'd like to hear more comments about experiences though.