Jupiter
in [Digital Cameras]
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From: Troy Piggins on 23 Oct 2009 11:43 The astrophotography has been keeping me occupied lately. This is my first attempt at planetary imaging. Lots to learn, I know. Don't see much astrophotography here so thought I'd share. Taken with a 8" f/10 scope with a 2.5x powermate (like a teleconvertor) giving it an equivalent focal length of around 5000mm. Camera was a DBK21 CCD camera. The dark spot is the shadow of one of the moons, and you can just make out the Great Red Spot at the top. http://piggo.com/~troy/photos/2009/2009_10_23/Jupiter091023_1.jpg All up I'm pretty happy with it. Suspect the scope needs some tweaking of the collimation which should give a sharper image. Will have to try that next time, haven't done it before. -- Troy Piggins
From: Damn 35 F. Rain - Staying Warm Inside Is Winning Today on 23 Oct 2009 12:17 On Sat, 24 Oct 2009 01:43:38 +1000, Troy Piggins <usenet-0910(a)piggo.com> wrote: >The astrophotography has been keeping me occupied lately. This >is my first attempt at planetary imaging. Lots to learn, I know. >Don't see much astrophotography here so thought I'd share. > >Taken with a 8" f/10 scope with a 2.5x powermate (like a >teleconvertor) giving it an equivalent focal length of around >5000mm. Camera was a DBK21 CCD camera. > >The dark spot is the shadow of one of the moons, and you can just >make out the Great Red Spot at the top. > >http://piggo.com/~troy/photos/2009/2009_10_23/Jupiter091023_1.jpg > >All up I'm pretty happy with it. Suspect the scope needs some >tweaking of the collimation which should give a sharper image. >Will have to try that next time, haven't done it before. Much depends too on "seeing" conditions. The atmospheric stability. Most times you just have to wait and hope for the best days. The very same perfectly collimated optics can provide a draw-dropping 3D-looking view of Saturn one day, and an irregular mushy blob the next. Look into the sharpening techniques that web-cam astrophotographers use, by combining details from many many frames to virtually look through the turbulent atmosphere, capturing and combining those bits of each image that are stable and sharp. You might also try stopping down the aperture of your telescope during bad seeing conditions. A larger aperture means that your telescope is trying to image through larger lower-frequency areas of atmospheric turbulence. If the turbulence that night is mostly of the lower-frequency variety it will help to filter it out. I keep a 6" mask handy for those times to put on my 16" scope. Apodizing masks also cure things on some days for planetary imaging.
From: Damn 35 F. Rain - Staying Warm Inside Is Winning Today on 23 Oct 2009 12:19 (silly typo correction) On Sat, 24 Oct 2009 01:43:38 +1000, Troy Piggins <usenet-0910(a)piggo.com> wrote: >The astrophotography has been keeping me occupied lately. This >is my first attempt at planetary imaging. Lots to learn, I know. >Don't see much astrophotography here so thought I'd share. > >Taken with a 8" f/10 scope with a 2.5x powermate (like a >teleconvertor) giving it an equivalent focal length of around >5000mm. Camera was a DBK21 CCD camera. > >The dark spot is the shadow of one of the moons, and you can just >make out the Great Red Spot at the top. > >http://piggo.com/~troy/photos/2009/2009_10_23/Jupiter091023_1.jpg > >All up I'm pretty happy with it. Suspect the scope needs some >tweaking of the collimation which should give a sharper image. >Will have to try that next time, haven't done it before. Much depends too on "seeing" conditions. The atmospheric stability. Most times you just have to wait and hope for the best days. The very same perfectly collimated optics can provide a jaw-dropping 3D-looking view of Saturn one day, and an irregular mushy blob the next. Look into the sharpening techniques that web-cam astrophotographers use, by combining details from many many frames to virtually look through the turbulent atmosphere, capturing and combining those bits of each image that are stable and sharp. You might also try stopping down the aperture of your telescope during bad seeing conditions. A larger aperture means that your telescope is trying to image through larger lower-frequency areas of atmospheric turbulence. If the turbulence that night is mostly of the lower-frequency variety it will help to filter it out. I keep a 6" mask handy for those times to put on my 16" scope. Apodizing masks also cure things on some days for planetary imaging.
From: Rich on 23 Oct 2009 13:37 On Oct 23, 11:43 am, Troy Piggins <usenet-0...(a)piggo.com> wrote: > The astrophotography has been keeping me occupied lately. This > is my first attempt at planetary imaging. Lots to learn, I know. > Don't see much astrophotography here so thought I'd share. > > Taken with a 8" f/10 scope with a 2.5x powermate (like a > teleconvertor) giving it an equivalent focal length of around > 5000mm. Camera was a DBK21 CCD camera. > > The dark spot is the shadow of one of the moons, and you can just > make out the Great Red Spot at the top. > > http://piggo.com/~troy/photos/2009/2009_10_23/Jupiter091023_1.jpg > > All up I'm pretty happy with it. Suspect the scope needs some > tweaking of the collimation which should give a sharper image. > Will have to try that next time, haven't done it before. > > -- > Troy Piggins You need at least 25,000mm to really shoot Jupiter. Nice shot at 5000mm though.
From: GregS on 23 Oct 2009 15:31
In article <20091024013510(a)usenet.piggo.com>, usenet-0910(a)piggo.com wrote: >The astrophotography has been keeping me occupied lately. This >is my first attempt at planetary imaging. Lots to learn, I know. >Don't see much astrophotography here so thought I'd share. > >Taken with a 8" f/10 scope with a 2.5x powermate (like a >teleconvertor) giving it an equivalent focal length of around >5000mm. Camera was a DBK21 CCD camera. > >The dark spot is the shadow of one of the moons, and you can just >make out the Great Red Spot at the top. > >http://piggo.com/~troy/photos/2009/2009_10_23/Jupiter091023_1.jpg > >All up I'm pretty happy with it. Suspect the scope needs some >tweaking of the collimation which should give a sharper image. >Will have to try that next time, haven't done it before. > You got a spot on your lens ! greg |