Hi all,
I've been on this forum ages as a mainly observer with some planetary webcam photography. I have taken a long break from astronomy for various reasons and I've been trying to haul myself back in to the game. Since we've all but been confined to our homes I'd thought I'd try out DSLR photography since I've never owned one. I ended up buying a Canon 600d and standard 18-55mm lens this week from CEX for a a reasonable price. So far I've been pleased with it and have been getting to grips with the various settings and manual zoom and focus options, it's certainly a huge leap from a smartphone and compact digital cameras.
Tonight though I tried out long exposure for the first time using some settings similar to what I used on my old IXUS 95; around 10-15 seconds exposure, ISO 100-400 and F3.5. The initial shots seem hopeful but the images are pockmarked with hot pixels. The blue, red and white pixels all seem to be in the same place and are present even with shots with the lens cap on. They can be removed with the camera's noise reduction setting but that requires another exposure of equal length to be taken right after the first.
Are these hot/stuck pixels typical of what I should be experiencing or is this abnormal and indicative of a defective sensor/camera?
Cheers 😁