PDA

View Full Version : Sensor cleaning



sod1
10-15-2005, 01:37 PM
Hello,
Attached is the picture that I took with my new (2 weeks old) Canon XT. See this dark circle in the left middle part of the picture? Do you know how I got it? (I was very, very carefull with my camera). How to get rid of it without sending it back to Canon?
Thank you.

Balrog
10-15-2005, 02:18 PM
I believe one of these (http://www.bhphotovideo.com/bnh/controller/home?ci=1&sb=ps&pn=1&sq=desc&InitialSearch=yes&O=SearchBar&A=search&Q=*&bhs=t&shs=giottos+rocket&image.x=0&image.y=0) could help you out.

ktixx
10-15-2005, 03:19 PM
Unfortunately all cameras come free with dust, it is inevitable. Usually the only time you will see it is when you shoot with small apertures (f/11+) and especially when shooting the sky. When you turn on your digital camera you charge your sensor, which attracts dust. Any time you change lenses you are making the sensor even more vulnerable to dust. I know a lot of people have used a blower and had some luck, but if you think about it you are just moving the dust around and it will just get stuck on the sensor again when you turn the camera on. Plus, you are effectively adding more dust to the camera when you blow air into it. Well there is a solution!! A lot of people (including myself) have had luck with the coperhill method http://www.pbase.com/copperhill/ccd_cleaning . This is where you take a PEC pad (non shedding) wrapped around a spatula looking thing and use methanol to clean your sensor. Not only does it work wonders, but it also removes the really stuck on dust that a blower will not. IT seems as if touching your sensor with anything would be a dumb idea, and it probably would be. But when you clean your "sensor" you are actually cleaning an UV Glass Plate that covers your sensor. Do what you will, however your camera will always have dust, and as far as I am concerned this is the best (and probably safest) way to clean your camera. The site that has detailed instructions on how to clean your camera and also a nice package containing all the necessary materials http://www.pbase.com/copperhill/image/39082096 . I have cleaned my camera about 15 times and never had a problem.
Good Luck
Ken

sod1
10-15-2005, 04:55 PM
Thank you, Balrog and Ktixx.

Norm in Fujino
10-15-2005, 07:26 PM
Unfortunately all cameras come free with dust, it is inevitable.


Revise that: "all cameras but the Olympus E system come free with dust."

From the perspective of Olympus users, dust is simply SEP (Somebody Else's Problem). Some recent commentary on the issue HERE (http://forums.dpreview.com/forums/read.asp?forum=1022&message=15398616).

It's interesting also that Phil Askey put up a new resolution chart (http://www.dpreview.com/news/0510/05101404newreschart.asp) to test high-MP cameras on his site, but to shoot it he selected the Canon D5, a camera that's apparently gaining a reputation as a dust magnet; sure enough, two large dust spots are visible at left and top of the resolution chart image.
I agree though, that dust is probably what you make of it. If you take it in stride, it's not such a problem. Luck of the draw.

eastbluffs
10-15-2005, 08:30 PM
Luck of the draw.
Don't know about that. More like us Canonites need our dust kits, and occassionally suffer factory dust too.

Canon will do the first cleaning free. Beyond that, they might as well include the cleaning kit with the box.:(

Taking it in stride seems inevitable.

Alas; got mine factory cleaned a month ago, have made about 15 lense changes since then, and I've noticed spots again.:o

sod1
10-16-2005, 09:02 AM
Revise that: "all cameras but the Olympus E system come free with dust."

From the perspective of Olympus users, dust is simply SEP (Somebody Else's Problem). Some recent commentary on the issue HERE (http://forums.dpreview.com/forums/read.asp?forum=1022&message=15398616).

It's interesting also that Phil Askey put up a new resolution chart (http://www.dpreview.com/news/0510/05101404newreschart.asp) to test high-MP cameras on his site, but to shoot it he selected the Canon D5, a camera that's apparently gaining a reputation as a dust magnet; sure enough, two large dust spots are visible at left and top of the resolution chart image.
I agree though, that dust is probably what you make of it. If you take it in stride, it's not such a problem. Luck of the draw.
I know about Olimpus. The problem is that I need to change all my lenses, not to say cable release, filters and so on. It is almost easier to go to not a SLR camera. Does somebody know any not SLR camera that has a zoom range from 20 mm to 400 mm and f number from 2 to 18 and also has "bubl" exposure?

patrickt
10-16-2005, 06:14 PM
I've had my DSLR for 1.5 years and have had to clean it with sensor swabs once. I routinely hold it facing down and blowing into it with a hand blower perhaps once a week. For me, that's all that has been necessary. It's really not a big deal. Neither is cloning a spot out of the sky which I've had to do perhaps a half-dozen times.

speaklightly
10-16-2005, 08:23 PM
You are indeed very lucky, and careful.

Sarah Joyce

eastbluffs
10-16-2005, 08:33 PM
I've had my DSLR for 1.5 years and have had to clean it with sensor swabs once. I routinely hold it facing down and blowing into it with a hand blower perhaps once a week. For me, that's all that has been necessary. It's really not a big deal. Neither is cloning a spot out of the sky which I've had to do perhaps a half-dozen times.
I agree. No big deal. Not a reason to switch or forego the huge advantage of dSLR. A lense swab kit is about $35. Hand blower about $20. I only did the factory cleaning because the factory depot is only a 10 minute detour from my drive to work and it was really dirty.

That said; Canon could really do to follow Olympus's lead, particularly since they seem to be going in the opposite direction.:( Some day, a perfect camera will arrive. Guess we'll have to be thankful the really important points have arrived at a pretty nice level.

Balrog
10-16-2005, 09:37 PM
Perfect Camera =
Canon ISO capability +
Nikon metering +
Pentax viewfinder +
Minolta Anti-Shake +
Olympus Dust-buster +
Universal lensmount

:D now we just need to convince them to get together and make one like that.