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DPChallenge Forums >> Hardware and Software >> Smudge on Sensor or Lens?
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09/26/2006 01:44:18 AM · #1
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Message edited by author 2006-12-11 08:34:56.
09/26/2006 01:51:07 AM · #2
Is it always the same size in the frame when focusing on something closeup and far away?

If you lens has zoom ability, is it the same size when zoomed out as when zoomed in?

If it's on an element of the lens that changes distance from the sensor with either, the smudge would change size I should think.

A smudge on the sensor, unless large, should only be visible at the smaller apertures (larger numbers). The reason for this is also the answer to your DOF question -- smaller apertures have more DOF and include sensor smudge (dust) more within.

David
09/26/2006 02:10:28 AM · #3
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If it is the sensor, here are some testing and cleaning instructions.
09/26/2006 02:18:32 AM · #4
Check the back of your lens for any dirt too.
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09/26/2006 07:22:48 AM · #5
Try another lens? If it's still there, it's on the sensor.

Added: if you dont have a 2ns lens, go to a store and pretend your buying one and you want to try one.

Message edited by author 2006-09-26 07:23:43.
09/26/2006 07:19:04 PM · #6
Yeah, it's on my sensor. Two tiny dark black smudges.

Okay, my next question...what do you folks use? Bulb blower? Sensor-Brush, SensorWand with wet PecPads?

I'm reading this site and he explains all the different ways. I just want some DPC real-world, layperson's experience.
09/26/2006 08:30:44 PM · #7
How did the smudge get there? I have a scratch that I put on my sensor when cleaning with copperhill (not copperhill's fault). I also developed a smudge that I can't get rid of that I didn't put there!

Copperhill is the best if you follow instructions. I don't think a blower will get rid of your smudge!

Originally posted by SecondCurtain:

Yeah, it's on my sensor. Two tiny dark black smudges.

Okay, my next question...what do you folks use? Bulb blower? Sensor-Brush, SensorWand with wet PecPads?

I'm reading this site and he explains all the different ways. I just want some DPC real-world, layperson's experience.

09/27/2006 07:34:11 PM · #8
Okay. Here's what I've done. The dust was on the sensor, so I bought a blower. After the first blow, the dust moved around. Two dust pieces shifted over some and the main piece is still there.

I blew again and now was down to the same main piece, but only one of the others...making progress.

I tried it again and now the to pieces I have are small. I either shrank the big piece down or got rid of it (and another took its place).

So, my two small specs are acceptable for now. I don't think anyone will notice. The only problem is that I KNOW that they are there. :-(

I'm so tempted to use the special brush or pad to clean it, but I'm not a "gamblin' man".
09/27/2006 10:59:45 PM · #9
i just opened up my camera a few minutes ago and blew a piece of dust off of it...with my mouth, after having eaten rice just prior to opening it up (i was still chewing while looking for the sensor-cleaning mode in the menu).

don't do it that way :D i'm suprised i didn't make it worse by blowing a foodchunk into my camera.
09/28/2006 01:16:52 AM · #10
Just get a 400D...they clean themselves
09/28/2006 02:32:48 AM · #11
Originally posted by TomFoolery:

Just get a 400D...they clean themselves


From what I hear, only "dry" dust gets cleaned. If it is a "wet" piece of something, meaning the piece of dust made it in there in a moist/humid environment, a blowing or brushing may be in order.
09/28/2006 05:15:58 AM · #12
I've cleaned my sensor several times over the past year (since I had my DSLR) with good results. I'm using SensorSwabs and Eclipse fluid. Sometimes I have to do a second cleaning to get rid of stubborn specks. I was nervous as hell the first time I did this, and I still try to do clean not too often, but so far I haven't had any problems with this method.

If you're really afraid to DIY you can always try to have it done at a store, but generally they take a few weeks and it costs a few bucks.
09/28/2006 11:03:47 AM · #13
Originally posted by nicoledb:

If you're really afraid to DIY you can always try to have it done at a store, but generally they take a few weeks and it costs a few bucks.


Does anyone know of any stores that will do it in-house, "while you wait"?
09/28/2006 11:08:23 AM · #14
Originally posted by lesgainous:

Originally posted by nicoledb:

If you're really afraid to DIY you can always try to have it done at a store, but generally they take a few weeks and it costs a few bucks.


Does anyone know of any stores that will do it in-house, "while you wait"?


Orleans Camera, Orleans, Massachusetts, on Cape Cod. Good People :-) They'll even teach you how to do it...

R.
09/28/2006 11:18:42 AM · #15
Originally posted by Bear_Music:

Originally posted by lesgainous:

Does anyone know of any stores that will do it in-house, "while you wait"?


Orleans Camera, Orleans, Massachusetts, on Cape Cod. Good People :-) They'll even teach you how to do it...


How do these types of stores do this (from a liability standpoint)? I mean, do they make you sign a waiver/disclaimer that if they screw up, it's too bad?
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