Astro Video Image Gallery
Posted 25 October 2012 - 03:09 AM
Posted 25 October 2012 - 08:15 PM
Posted 25 October 2012 - 09:46 PM
1/3" sensor = approximately the fov of a 6mm 50° eyepiece (like a Plossl)
What f.l. is the Sammy out of the box, no zoom (compared to an eyepiece)?
Really nice Jupiter by the way Jerry.
Posted 25 October 2012 - 10:28 PM
Thank you very much. So, with my 203mm aperture and 1000mm focal length, my calculation should be (appx.): 1000/1.4 = 714x? Wow, I don't know if that is possible with my scope. Does that seem right?
Posted 26 October 2012 - 10:30 AM
First actual magnification comparisons get a little silly with digital cameras since you can change the final representation at will. Actual magnifications rely on how you reproduce the image that's on the CCD/CMOS sensor.
With your Sammy and a 1000mm scope Jupiter will appear to be the same size when measured against the fov of a 6mm Plossl eyepiece as across the fov of the camera. A 6mm eyepiece in your scope will produce about 167X.
For your Jupiter shot with a 2x Barlow your working at about 2000mm ... so about 333x, then with the digital zoom at 2.3x you'd be at something equivalent to 767x. Yes, this is magnification that likely wouldn't be very useful visually, but remember that you're actually capturing at 333x and only then increasing the magnification of the image within the camera.
The video camera is however running at many frames per second (depends on what exposure settings you used) and so it's "freezing" the seeing. I'll bet looking at all the individual frames in the video stream that the majority of them wouldn't be very good.
Posted 26 October 2012 - 10:56 AM
Thanks again, very informative. Yes, the avi. stream is rough. Respectfully, how is it that you come by all your knowledge related to these questions, if I may?
Posted 29 October 2012 - 03:28 PM
Date: Oct 26, 2012
Telescope: ES AR152 F/6.5 Refractor
Mount: Manual Alt-az
Camera: Mallincam Jr. (ALC: OFF, AGC: OFF, SENSE: OFF)
Posted 29 October 2012 - 11:48 PM
Posted 12 November 2012 - 11:09 PM
Posted 12 November 2012 - 11:15 PM
Posted 22 November 2012 - 01:14 AM
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Posted 22 November 2012 - 05:37 AM
Posted 12 December 2012 - 12:29 AM
Posted 12 December 2012 - 12:30 AM
Posted 16 December 2012 - 12:33 PM
x128 with ES AR152
Posted 21 December 2012 - 07:43 PM
Posted 27 December 2012 - 12:58 PM
Posted 28 December 2012 - 10:01 AM
Posted 28 December 2012 - 10:03 AM