Quote:
Originally Posted by doppler
Hi Tony, I had the same issue with guiding not happening time and time again, but after I got a 50mm finder guider everything started working. I still have the occasional night when nothing goes right but I have managed to get some good 5min subs at 1200mm and 1350mm fl. I think that with longer focal length guide scopes the guider just works too hard?
Darks just help to remove hot pixels, so if your sensor was really good you might not notice the difference, I can certainly notice the difference with my 1100d. Flats help to eliminate dust etc in your imaging train that shows up in your pics. I have never bothered to take any flats because you have to take them with everything set up on your scope exactly as you have been imaging and with a pure white light source.
Rick
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Yeah, flats - I get what they're supposed to do, but they just don't work for me. I've tried a sunny sky with a white shirt stretched across the OTA for flats, but nope - ruined the image something horrible. Tried even & odd numbers of them, big numbers, small numbers, slightly overexposed, slightly underexposed etc to no avail.
In any case, I'm so lazy with regards to collimation that the edges are all smeared from hell to breakfast anyway so I crop any vignetting out! I'm shooting 24MP and for widefield I've got my trusty ED80 anyway so no great loss. Just weird how they always destroy my images rather than improve them. Maybe it's the light source; maybe it's something weird I'm doing. No idea!