My previous post mentions noise artifacts that can be produced within the camera . These are relatively rare and initially had me thinking I was looking at some legitimate and very unusual objects until some dark frame tests revealed their true identity. It is quite a coincidence that my next session produced a satellite
flash and a camera artifact close to each other on the same frame. This
two satellite plus artifact sequence shares the frame with the
distinctive quartet of stars in Delphinus.
As we are now in the period when Perseid meteors are likely to appear I've decided to use my wider 28mm lens to stand more chance of picking one up. No luck so far with meteors but another mystery single flash was detected (visible lower right).
I have found that sometimes the camera itself can occasionally
generate a bit of random noise (other than hot pixels) but such noise is
quite easy to identify on enlargement. My 28mm lens suffers some CA
around the edges when wide open which shows as offset spots of red. This
particular object has an associated red spot so confirms it came via