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DSLR's For Astrophotography - Tech Notes

Signal and Noise in Digital Cameras
Signal and Noise in Digital Cameras		 300D + Quantum Efficiency
:: 300D + Quantum Efficiency :: 		Read Out Noise in Digital Cameras
:: Read Out Noise in Digital Cameras :: 		Peltier Cooling
:: Peltier Cooling ::
Noise Evaluation of 1D mk2
:: Noise Evaluation of 1D mk2 :: 		The 300D filter Modification
:: The 300D filter Modification :: 		Lens Tests
:: Lens Tests :: 		Dynamic Range vs Sensitivity
:: Dynamic Range vs Sensitivity ::
Central DS cooled Canon 350D
:: Central DS cooled Canon 350D ::
Terry Lovejoy 30-Jun-2004 11:07
Alfredo,

The 300D is SLR camera, so it has a standard 35mm Canon EOS lens mount. I just use a T-Ring adapter and focus/compose by using the in-built viewfinder to preview images. Its so easy!

I am sorry I have no experience with webcams or the like so I can't offer any advice.

Terry
Alfredo Zanazzo 30-Jun-2004 09:31
dear friend,

I was very impressed by your photos and skill in using a still camera for deep sky photography with such results!
I am very interested on the subject, but please tell me: how do you use the camera, I mean, do you remove its optics or do you work through an eyepiece attached to the focuser?
Another question, seeing that you are so experienced in the subject.
I like very much high resolution photography, planets and moon.
At present the greatest results were obtained with webcams videos captured on the PC
and processed with Iris.
I recently bought a tiny but excellent resolution videocamera, the Sanyo XACTI, smaller
than a philips VESTA webcam with 3.2 megapixel effective.
Using it through its optics is very easy, but due to all the optical surfaces involved,
the quality barely equals the webcam.
The format used by the card is mp4, rather complicate to be converted into avi (I need to
do 2 passages first convert it to mpeg2 and after to avi)
I wonder if some genius could manage to REMOVE THE OPTICS from this small jewel!
Shooting with the camera lens a single frame (640X480) has a fantastic sharpness and
quality. The camera does not work as a webcam so you can not capture on PC but you have to use the SD card (up to 1 gygabyte).
What do you think about?
Thanks for your assistance
Alfredo Zanazzo (www.operistico.it)alferd@uno.it
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