CCD vs Film? Lots of time vs no patience? Alright, this is your place to discuss all the astrophotography what's and what's not. You can discuss about techniques, accessories, cameras, whatever....just make sure you also post some nice photos here too!
weixing wrote:Hi,
Wow...very nice. I also want to try this in the future. By the way, how long did you guide, what setting did you use and your lens information???
Anyway, have you try the dark frame subtraction?? Your image seem a bit noisy... may be cause by the light pollution???
Have a nice day.
Hi WeiXing,
Photo details are as followed.
Camera : Canon EOS10D
Lens : 50mm f/1.4 USM
Exposure program : manual
Exposure time : 30seconds
F-Stop : f/2.8
ISO Speed ratings : ISO 400
30 second guided (approximate polar alignment) The camera was mounted on the GEQ tripod with motor drive meant for the Celestron C90.
It's a little noisy because of light pollution, long exposure and high ISO combo. Didn't really do any post-processing except convert the image from Canon RAW to JPEG using Photoshop CS.
Hi,
You mean you mount your camera on the EQ mount alone??? If this is the case, this is consider unguided. May be you should mount your camera with your C90, so that you can use your C90 to guide and do a longer exposure.
Anyway, I will be trying out wide field astrophotography using my camera soon... hope that can obtain result as good as yours...
Yang Weixing "The universe is composed mainly of hydrogen and ignorance."
weixing wrote:Hi,
You mean you mount your camera on the EQ mount alone??? If this is the case, this is consider unguided. May be you should mount your camera with your C90, so that you can use your C90 to guide and do a longer exposure.
Anyway, I will be trying out wide field astrophotography using my camera soon... hope that can obtain result as good as yours...
Unfortunately, I don't have the piggy back for my C90. However, I did take the following pictures prime focus off the C90 with the T-Adapter I purchased.
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hi vince..what's the focal length of the C90? seems the size of the moon looks awfully small for a Mak. For my ETX90 @ 1250mm, even a 40mm eyepiece would just barely fit into the camera's FOV...so your scope has to have a very short FL for such an image..good effort !
The Boldly Go Where No Meade Has Gone Before Captain, RSS Enterprise NCC1701R United Federation of the Planets
Airconvent wrote:hi vince..what's the focal length of the C90? seems the size of the moon looks awfully small for a Mak. For my ETX90 @ 1250mm, even a 40mm eyepiece would just barely fit into the camera's FOV...so your scope has to have a very short FL for such an image..good effort !
You might be doing eyepiece projection so there's magnification there. I'm using the C90 as a lens (prime focus photography) so it'll end up being a 1000mm f/11 lens.
The picture of the moon is actually resized. Original size is the one in my avatar...taken off the same photo.
edit : what camera are you using? The EOS 10D has a 1.6 crop factor which mean that technically, the lens is 1600mm instead of 1000mm as per full frame 35mm SLRs/DSLRs.
Just a question, you are doing prime focusing with EOS 10D .... what lens (the make and diameter) you use to do the prime focusing? Most of my lens are 77mm......
.... ok .... wait for the moon to hide itself ......
"The universe is composed mainly of hydrogen and ignorance." 
