|
I find sometimes when there are bright stars in the field when using a chip with small wells - less than 40,000 electrons, you can, with some scopes with largish aperture, see bloated stars. I see this with my KAF8300 and ICX694 cameras sometimes.
Otherwise bloated stars are poor focus, bad seeing (hard to notice unless you are imaging at around 2 metres or more focal length), thin cloud.
If you use a clear luminance filter you will get a bit more light but slightly bloated stars from the IR component which is normally filtered.
Greg.
|