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#1
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spots on my sensor
On my Canon Rebel 350xt I have some spots on my sensor. I tried the proceedure of locking up the mirror and blowing air in there but that didn't do it.
I either have picked up a few bad pixels or I have some stubborn spots on the sensor. ...so how I do tell the difference between the two? What do I do in either case? |
#2
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sounds like time for a CLA
Ed __________________ Gold is for the mistress - silver for the maid Copper for the craftsman cunning in his trade. "Good!" said the Baron, sitting in his hall But steel - cold steel is master of them all. Rudyard Kipling (1865 - 1936) |
#3
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Tracy - I doubt you have blown pixels since dust spots are common. To confirm that they are dust spots, pick an area of sky or any uniform light background and zoom in on the spot. It will probably not conform to pixel shape and it will look grey and be soft around the edges.
You could send it in for a 'factory cleaning.' I've not done that yet but I have had good experiences with Canon service - quick turn-around and they communicate well throughout the process. You could also use one of the 'wet' cleaning systems that are commonly available, but they say that can be trickly and leave streaks if not done properly. I don't think dust spots are very avoidable. Thankfully Photoshop's clone and blemish tools are easy to use and very effective! |
#4
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As I researched on the web after posting that, I've come to believe it's simply sticky dust on the sensor. The images flaws look just like what you describe as dust. I have sent away for a kit from Cooper Hill Images, a 'swipe' of some sort. I'll let you know how it goes. I've been using photoshop to cover up the blemishes but I've been trying out a white back ground lately and the dust spots exploded.
So what cool photo stuff did you buy yourself for Christmas Buddy? |
#5
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Tracy, bad pixels will be more of a white spot. Dust is common and I think we all have a spot or two to work around. After the Shot Show I'm sending in one of mine for a good cleaning so I'll give you a run down on their service.
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#6
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every digi on the market will have 'hot spots' on the sensor in at least one place. it's the nature of the beast. you can take a photo with the lens cap on and blow it up and look for the non-black areas.
They will look like this. This is a full frame shot. Under extreme magnification they will immediately pop out. There is probably a repair shop in your town that could do a CLA and clean that off. They have all the tools and etc for that and they are not that expensive to use. Ed __________________ Gold is for the mistress - silver for the maid Copper for the craftsman cunning in his trade. "Good!" said the Baron, sitting in his hall But steel - cold steel is master of them all. Rudyard Kipling (1865 - 1936) |
#7
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I've cleaned my sensor a number of times with success. I use this pickup swab with a silicone tip that grips the dust and holds onto it. Cheap, quick, non-violating, and efficient. Got it at B&H.
BTW, I never had success blowing air in there. It made things worse. Coop |
#8
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I'm committed now to trying the kit I've ordered. I'll report back on how well it works when I give it a go. If that doesn't work, I'm sending it off. These spots are really bugging me now. Score one for film and I didn't think I'd ever say that given today's technology.
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#9
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Quote:
But Lord Yes, there are times I miss my darkroom. My hand still wants to make the double cocking motion to set the shutter and advance the film on my RB 6x7 every time I take a shot. |
#10
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Tracy, the Cooperhill method is the way to go. It is easy and you can do it fast. I have used that method many, many, many times on my 20D and previously on my 300D. You will not harm the sensor. First blow off all you can with a hand blower and then swab with Pec Pads and Eclipse fluid. I use a cut down spatula )14mm for the 20D sensor) and wrap it in a Pec Pad as they show on that Cooperhill tutorial. Just use each side only once. You get those dust spots on your sensor mostly from changing lenses. If you don't change lenses you probably wont need to clean very often at all.
So, don't send it in. I have heard so many folks who got it back and spots were still there. It is a fact of shooting so relax and clean it yourself. I don't get too anal about it. If a small spot or two is visible at f/22. You may not even see them at f/8. __________________ Glen |
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