Friday, July 29, 2005
10-In SCT f/35 484/900 stacked. 10:11:38 UT
CM = 151
Saturday, July 23, 2005
I decided to use my Barlow lens to get some extra focal length and the result is below. By measuring the diameter of the image in pixels and knowing that Mars was 10.68 arc secs at this point and that the pixels in the ToUcam are 5.75 microns wide, I calculate that the EFL is 8,425 mm which implies F/33.6.
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| 200/3600 stacked |
Reprocessing (at a later date) gives, possibly, a better representation. |
The regular monthly meeting of the Digital SIG started at 7:00 pm at the Weldon Spring Interpretive Site. Eight people were in attendance. We looked at some Mars images taken by Jim Melka and Jim Roe with their ToUcam cameras the same morning. Mars is less than 11 arcsec in diameter, but the detail possible is astounding (at least to old hands who remember the old days).
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Mars - Wednesday, 7/20/2005
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Image at left taken at 10:22:04 UT: CM ~245
Image at right taken at 10:47:00 UT: CM ~245 |
Left: 24 stacked in Registax
Right: 19 stacked in Registax
10-in LX-200, F/10, ToUcam 5 fps, shutter 1/100
post-processed in the Gimp, 4x, composited
