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Forum: Pentax K-30 & K-50
02-06-2019, 02:35 AM
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Forum: Pentax K-30 & K-50
02-02-2019, 03:51 PM
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Yes, dust on the sensor. This is very common. As Adam suggested, ask the seller to clean it. The way to check that it is clean is to get a photo of the sky or a white wall at f22. Any dust or scratches will show up then.
It's prudent to get a rocket blower (like this: Giottos Rocket Air Blower Cleaner Air Jet Cleaning for Camera PC Devices Black | eBay) so you can blow off any dust as soon as you discover it, before it sticks. Once it sticks you will need either a gel stick (like this: amazon.com : Neewer Optical Sensor Cleaning Kit for Nikon Canon Sony Pentax Olympus and Other DSLR Cameras, Includes(1) Dust-Sticking Bar+(1) Viscous Cleaning Paper : Camera & Photo?tag=pentaxforums-20&) and if that doesn't work swabs and fluid (like this: amazon.com : APS-C Frame (CCD/CMOS) Digital Camera Sensor Cleaning Swab Type 2 Cleaning Kit (Box of 12 X 16mm Swab + 15ml Sensor Cleaner) : Camera & Photo?tag=pentaxforums-20&). You may be able to get them all in a kit. A loupe is handy too.
Even if you are only using one lens you can still get dust on the sensor. Remember that there is already dust in the camera.
I downloaded the file and looked at each image, including this one, but I can't see it. It's probably a single dead pixel. That's common too. The K-50 has a pixel mapping feature (accessed through the Setup menu 2) - run that and it will map and correct for defective pixels on the sensor.
From looking at the images I can't see any significant issues. The lens seems OK - typical for this lens. (The corners are soft with the aperture open, but that's how it is with this lens. Stop down and it improves at the wide end.) As others have said, dust in the lens is normal and doesn't affect images. The shutter count is quite low too.
The only real issue is the one others have mentioned - the risk of aperture block failure. You need to factor that in. But I had two K-30 cameras (the twin of the K-50) and had no problem with either. It's a nice camera - well featured, but easy to use. A good cheap intro to DSLRs.
When you are in Japan, you might find other lenses (and maybe a camera) at good prices too.
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