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Pentax Ist D
Pentax Ist D
Pentax ist-D Camera problem?
My images have “spots” in the same area on each frame, despite changing lenses. What’s wrong and what can I do myself to repair it?
Hi SQ+2,
Are the spots dark, or bright?
Bright spots are probably stuck pixels. If the camera is still under warranty you could try sending it in to have the sensor replaced, but otherwise it’s best to fix them in post-processing software (spot-cleaner tool, spec-cleaner tool, etc). Stuck pixels usually show up more in high ISO and long-exposure shots.
Dark spots are probably dust on the sensor. Dust spots appear smaller and more focused when the aperture is smaller (like f/22), and larger and less focused (sometimes fading to near invisibility) when the aperture is larger (like f/3.5).
There are various ways of dealing with sensor dust:
First, you can fix most sensor dust in post-processing software (spot-cleaner tool, spec-cleaner tool, etc). But there are also many ways of cleaning the dust off of the sensor:
Some people get it professionally cleaned. That can get expensive, and sometimes with disappointing results.
Many people recommend getting a big bulb blower and blowing the dust out, while holding the lens opening face down. I haven’t had much luck with that method. It only helps with loosest dust, and much dust is sticky. Sticky dust doesn’t respond to blowing. Also, the smallest dust isn’t much affected by gravity, so even if you’re holding the lens opening face down while blowing upwards, the smallest dust is just swirling around in the chamber, ready to attach to the sensor the next time the camera is turned on in normal mode, which gives the sensor an electrostatic charge that attracts dust.
Some people recommend blowing it with compressed air, while others warn that compressed air is too much force and could damage the sensor or other parts, and also that it would force dust into other inner areas of the camera where it could do other damage. I’ve never tried compressed air.
The only way to thoroughly clean off all dust spots is to do a wet cleaning. Everything you need to know about wet cleaning is here:
http://www.copperhillimages.com
Wet cleaning is great for getting the sensor really clean, but due to the time it takes and the need to do it without small children around grabbing everything, I don’t do it as often as I’d like.
Another solution that is very quick, but does a much better job for me than a bulb blower, is the “Arctic Butterfly” sensor brush by VisibleDust:
http://www.visibledust.com
It’s very quick, so I use it often. It doesn’t clean off the most stuck dust, but it does get most of it. It works much better for me than a bulb blower.
So, my recommendation is to read about wet cleanings at the Copper Hill website, and do wet cleanings occasionally, but also get a VisbileDust Arctic Butterfly for frequent cleanings between wet cleanings.
Regardless of how you clean the sensor, you’ll need to put the camera into sensor-cleaning mode to do it. Press the Menu button, then scroll down to Sensor Cleaning, then choose Mirror Up. When you’re done cleaning, turn the camera off and back on to go into normal mode.
Good luck!
Greg
09062801 PENTAX *ist Ds time lapse Movie
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USB Cable Cord for Pentax Optio 33WR, 33XWR, 43WR, 50, 50L, 60, 450, 550, 555, 750Z, A10, A20, A30, A36, A40, E10, E20, E30, E40, E50, E65, E70, i5, H90, i-10, ist DS, ist DL, ist DS2, K-X, KD10, K10D, KD100, K110D, KD200, L20, L30, L40, L50, MX, MX4, M10, M20 Digital Camera – 5 Feet black – Hi-Tech Dealz® $0.99 Hi-Tech Dealz® USB Cable Cord for Pentax Optio 33WR, 33XWR, 43WR, 50, 50L, 60, 450, 550, 555, 750Z, A10, A20, A30, A36, A40, E10, E20, E30, E40, E50, E65, E70, i5, H90, i-10, ist DS, ist DL, ist DS2, K-X, KD10, K10D, KD100, K110D, KD200, L20, L30, L40, L50, MX, MX4, M10, M20 Digital Camera. Please note there may be other models compatible with this cable, please confirm with us before purchasing…. |
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Remote Shutter Release for Canon Rebel XT, XTi, XSi, XS, T1i, EOS 1000D/450D/400D/350D/300D, Pentax Super/K100D/K110D/ *ist Ds2 / *ist D / *ist Ds / *ist / *ist DL, Samsung GX-20/GX-10/GX-1L GX-1S, + Many More! $0.01 New Shutter Release Remote Control Cord for Canon Cameras Remote Cord for Canon RS-60E3, 3 Feet (91cm), Black It adds greater convenience and ease in many shooting situations |
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