I'm having a couple of issues with my camera at the moment, some of the photos have got tiny white marks in the image, usually around the middle of the photo.

I'll try and get an image up on the web somewhere to show what I mean, but until then does anyone know whats causing it?

Oh i've got a Pentax *IST if that helps

It's impossible to tell without seeing them, and even then it'll probably be a guess.

If they were black, i'd say dust on the sensor without a doubt, but i can't imagine that being white.

How big are the marks, and how clearly defined are they? Are they fuzzy or sharp? One pixel or 50? If the white marks are very small and sharply defined, it could be duff pixels on the sensor perhaps.

Having a few problems getting an image online, forgotten my password.

They are white, and only 1 or 2 pixels wide. And theres only a few of them, but they aren't on every picture though, maybe 1 in 10.

Its probably a problem with my sensor instead of dust isn't it, I did try giving it a clean over the weekend but to no avail.

I think my best option would be to give Pentax a call.

Cheers for the help anyway!

It sounds very strange to me. Normally duff pixels aren't intermittent though. I'd call Pentax.