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03-06-2014, 01:17 PM   #1
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Issue with spots: how to find what to clean

This is a request for help.
Tonight I was testing a new setup: Q + Adaptor + Nikkor 18-105.

Suddenly I saw spots , here they are on a picture of a clear sky:

In panic I checked what was going on, the lens was closed up quite a bit.
So I opened the lens up = no issue with spots anymore.

Next test the Pentax-02 full open = no issue with spots.
Next test the Pentax-02 full closed = no issue with spots.
Next test the Nikon DX with lens full open = no issue with spots.
Next test the Nikon DX with lens full closed = no issue with spots.

My suspicion is that the spots are rests of cleaning products on the lens, the Nikon DX does not have the issue due to less magnification.
=> any suggestion :confused: in how to determine where the issue really is. I posted it here since I only have it on the Q at this moment.


Next test I did with the Nikkor 50mm f1,8G:

Bad news the spots reappeared and seem to be on the same place when closed down.
Since I do not see this comes from the adaptor and I have it with 2 different lenses, this seems to be my Q.

Should I try to clean or hand it in at a professional?
How to find a good professional? (I trust the Nikon importer, did not find a Pentax one here)

Last edited by Vince_Lux; 03-06-2014 at 01:36 PM.
03-06-2014, 01:51 PM - 1 Like   #2
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Location: Saskatoon, SK
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Google this: => how to clean a sensor
03-06-2014, 04:12 PM - 1 Like   #3
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yep, dust on your Q sensor, little clean and you will be away
03-06-2014, 11:10 PM   #4
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Posts: 25
Original Poster
OK thanks, on my DSLR I remember that they recommend to send the camera in for professional cleaning when it concerns the sensor. I think IŽll try a small careful clean here.

03-07-2014, 01:04 PM   #5
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Do you clean the sensor or the protective window? Or is it the same thing in this case?

I ask because I wonder if the sensor is sealed under that window or if dust can get trapped inside.
03-07-2014, 01:49 PM   #6
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just clean the surface you can see on top. That's what we call the sensor.


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