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Old May 16, 2010, 1:15 PM   #1
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Default Mark on photos.... advice required please!!

Please see the attached photo and notice the marks in the sky. They appear on all images, so not lens related. I am using a Pentak K10D. I have tried dust removal with no success. I am hoping it's not fungus / mold in the camera.

Any advice would be greatly appreciated.

Regards

PoulK
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Old May 16, 2010, 1:29 PM   #2
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Well... I can't see what camera settings were being used with that photo.

But, it looks like a dirty sensor (that's about the only thing that will cause that type of problem, as you usually won't see anything in your photos from a dirty lens). Chances are, it's just a few specs of dust.

Dust or other debris on a sensor is usually going to be more visible at smaller apertures (higher f/stop numbers) against a bright background (like the sky in your image), and usually become less visible at wider apertures (smaller f/stop numbers). So, you can often have a pretty dirty sensor and never notice it at many commonly used aperture settings (e.g., f/4, f/5.6, f/8) with smaller dust particles. I don't even bother to clean a sensor if any dust on it doesn't become visible until around f/14 (since I'd rarely stop down the aperture that much).

Here's a page that goes into commonly use sensor cleaning methods. For stubborn particles, you may need to use a wet cleaning method. For loose particles, a rubber bulb type blower usually works.

http://www.cleaningdigitalcameras.com/methods.html
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Old May 16, 2010, 2:15 PM   #3
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Default Thanks JIMC

Hi JimC,

Appreciate the quick reply. I have tried my blower brush and have removed all marks but one. You are correct with the aperture as I only notice the marks on small F settings.

I may try a sensor cleaning kit as you suggest.

Thanks again

PoulK
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Old May 16, 2010, 2:32 PM   #4
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It looks like these guys carry sensor cleaning supplies (pec pads, eclipse, etc.) in the U.K.

http://www.cameraclean.co.uk/index.php

Here's a page they show listing dealers (but, not all dealers may stock those types of items). You may find that some offer cleaning services, too.

http://www.cameraclean.co.uk/Dealer_List.php
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Old May 17, 2010, 1:46 PM   #5
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Thanks again. These sites are very useful and from what else I have seen elsewhere very competitive prices too.
Appreciate your help and advice.
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Old May 17, 2010, 2:25 PM   #6
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I'd probably just get something like this kit to get started with what you need for now. It would give you rubber bulb blower for loose particles, plus 4 sensor swabs and a small bottle of Eclipse for wet cleaning the sensor when needed. You probably won't need to clean it very often.

http://www.cameraclean.co.uk/product...2+Sensor+Swabs

More here (you'll want type 2 for your Pentax):

http://www.cameraclean.co.uk/product...+Cleaning+Kits
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