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DPChallenge Forums >> Tips, Tricks, and Q&A >> out damn spot, out
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01/07/2005 06:48:04 PM · #1
I have a small spec of dirt on the mirror in my camera which looks like a large blob in the viewfinder.

I am afraid to blow it away back onto the image sensor and I don't want to scratch the mirror either.

what would you do?
01/07/2005 06:49:44 PM · #2
well i would blow it, then if it's still there take it to Nikon for a free 5 min clean

Not sure about Canon but one would presume they offer a quick free clean too..

01/07/2005 06:56:07 PM · #3
i blew on it, no problems, thanks for the help
01/07/2005 07:07:48 PM · #4
I used a speck grabber. Worked fine. I do not use the speck grabber on the sensor, though.
01/07/2005 07:17:51 PM · #5
How long have you had your camera that you have dirt inside? I've had mine a year now and never had a speck of dirt get inside and I change lenses often.

Message edited by author 2005-01-07 19:18:15.
01/07/2005 07:38:42 PM · #6
ive had it for about 6 months now, ive already had dirt on the sensor and now dirt on the mirror. I do a lot of my shooting outside, id imagine that would be the root of most problems
01/07/2005 07:41:13 PM · #7
Originally posted by fsteddy:

How long have you had your camera that you have dirt inside? I've had mine a year now and never had a speck of dirt get inside and I change lenses often.


Hmmm, you don't shoot at f/22 too often do you? try shooting a sky, intentionally OOF, with the aperture at f/22. then look at the result and I guarantee you'll see quite a bit of dust. Unless you live in a class 100 cleanroom, it's inevitable to get dust in there.
01/07/2005 07:46:46 PM · #8
Originally posted by kirbic:

Originally posted by fsteddy:

How long have you had your camera that you have dirt inside? I've had mine a year now and never had a speck of dirt get inside and I change lenses often.


Hmmm, you don't shoot at f/22 too often do you? try shooting a sky, intentionally OOF, with the aperture at f/22. then look at the result and I guarantee you'll see quite a bit of dust. Unless you live in a class 100 cleanroom, it's inevitable to get dust in there.


lol, I agree. After 10 months mine looked like this...and that is after I dug out the big ones with the speck grabber. I no longer user the speck grabber for the sensor, though. It can smudge and it seems more 'dangerous' than the cleaning kit.

I would recomment shooting a sky too. I bet there's dust there you don't even know exists!
01/07/2005 10:42:55 PM · #9
What is a speck grabber? That's a new one on me. How about a link, please.
01/07/2005 10:59:37 PM · #10
Originally posted by coolhar:

What is a speck grabber? That's a new one on me. How about a link, please.


Harvey, you can find them here or here
01/09/2005 01:16:25 PM · #11
Originally posted by ButterflySis:

Harvey, you can find them here or here


TYVM Sis, I think I'll give the speck grabber a try. May be a handy thing to carry in your bag.
01/09/2005 02:27:52 PM · #12
I just noticed the other day that there is an article and Luminous Landscape titled "Out Damn Spot" as well. It reviews some products for cleaning sensors. I don't know anything about any of them but just wanted to point it out.
01/09/2005 02:36:05 PM · #13
this will no doubt sound stupid, but (after having a big arse of a blob on my sensor withon days of owning it) why can't camera manufacturers have a thin sheet of flat glass separating the lens from the mirror and sensor set-up? i mean, if the sensor is kept in a clean vacuum (just like in a budget digital compact) dust would never occur. right? or am i being too naive?
01/10/2005 04:20:29 AM · #14
Originally posted by redmoon:

this will no doubt sound stupid, but (after having a big arse of a blob on my sensor withon days of owning it) why can't camera manufacturers have a thin sheet of flat glass separating the lens from the mirror and sensor set-up? i mean, if the sensor is kept in a clean vacuum (just like in a budget digital compact) dust would never occur. right? or am i being too naive?


Because the distance between the rear element on the lenses varies between models (and with focal length on some lenses) and therefore, the angle at which the light would pass through the bit of glass on it's journey to the sensor would change, and you'd have all sorts of weird abberations and distortions in your image.

If the angle the light passed through the bit of glass was always the same you could do it, but that isn't the case..

Cheers, Me.
01/10/2005 05:05:51 AM · #15
Originally posted by ohmark:

Originally posted by redmoon:

this will no doubt sound stupid, but (after having a big arse of a blob on my sensor withon days of owning it) why can't camera manufacturers have a thin sheet of flat glass separating the lens from the mirror and sensor set-up? i mean, if the sensor is kept in a clean vacuum (just like in a budget digital compact) dust would never occur. right? or am i being too naive?


Because the distance between the rear element on the lenses varies between models (and with focal length on some lenses) and therefore, the angle at which the light would pass through the bit of glass on it's journey to the sensor would change, and you'd have all sorts of weird abberations and distortions in your image.

If the angle the light passed through the bit of glass was always the same you could do it, but that isn't the case..

Cheers, Me.


Even then, you'd just have to clean that bit of glass just as carefully as you'd clean the sensor. :^)
01/10/2005 05:07:57 AM · #16
I thought these brushes were way too expensive, but bought them anyway, and the result of using them was amazing. I had LOTS of dust on my sensor, now it is spotless.

I still have a speck on the mirror, but just don't worry about it.
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