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View Diary: *New Day* Telescopes and Star Parties (180 comments)

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  •  Astronomy is a lot of fun. (7+ / 0-)

    Been into it since ... forever.

    I just wish that it didn't cost so much to get a camera capable of doing long exposures for astrophotography.  It would be simple, it seems, to set up a digital camera in the eyepiece and feed the input to a laptop for long exposures, and it can be, but it ain't cheap!

    I am not religious, and did NOT say I enjoyed sects.

    by trumpeter on Thu May 16, 2013 at 09:21:52 AM PDT

    •  ...I have an ancient camera that was given... (5+ / 0-) me. It is actually and old Russian camera. It is NOT digital. I have it looking through my telescope and then keep the shutter open the entire time. It uses film (like I can get that anymore).

      We'd take film that was not too grainy and then freeze it with liquid nitrogen (yep!). The colder the film, the less grainy the negative (interesting, no?)...

      The thing about film is if you use color film and expose it long enough, you'll get colors. Our eyes don't do that. Stuff in the night sky looks black and white to our eyes unless it is something like a bright star that is literally shining blue or red light...then we can see the color.

      The reason things look black and white for the most part to our eyes is the cells in our retinas do their thing every time a photon hits them. Our eyes don't "collect" light and then process that information...SO, things in the night sky don't put off a lot of light actually...the photons hit our eyes and are processed and so seen as black and white.

      With a CCD or digital camera, you're computer would obviously be processing the constant incoming information. The longer the exposure, the more colorful the image...

      Ignorance is bliss only for the ignorant. The rest of us must suffer the consequences.

      by paradise50 on Thu May 16, 2013 at 09:44:44 AM PDT

      [ Parent ]

      •  I remember looking at a nebula for the first time (3+ / 0-)

        through the scope and being disappointed that is was just a grey misty cloud. I think it was the horse head. In any case, I started to get into the astrophotography because of that, but the time and expense kept me away from it.

        Your setup sounds cool.

        "If you don't sin, then Jesus died for nothing!" (on a sign at a Mardi Gras parade in New Orleans)

        by ranger995 on Thu May 16, 2013 at 09:49:11 AM PDT

        [ Parent ]

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