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Sol Robbins
Carpal Tunnel
Reged: 12/01/03
Posts: 1609
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Lastly, with the CED2.
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S.R.
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Tamiji Homma
Pooh-Bah
Reged: 02/24/07
Posts: 1081
Loc: California, USA
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Hi Sol,
Thank you for nice sketches. I found it very interesting. It is difficult to pick up details from super bright Venus surface.
I am curious how you see the full Moon surface with CED2.
It looks like the CED is interesting product.
Tammy
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Sol Robbins
Carpal Tunnel
Reged: 12/01/03
Posts: 1609
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Thank you very much Tamiji.
THe Moon will have to wait as will Jupiter. These objects may prove to be interesting as test subjects.
It was interesting that with the CED2, light scatter from the air and/or the eyepiece was eradicated.
Other than the CA inherrent in an achromat, Venus had a very clean appearance.
Best,
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S.R.
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Tamiji Homma
Pooh-Bah
Reged: 02/24/07
Posts: 1081
Loc: California, USA
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Quote:
THe Moon will have to wait as will Jupiter. These objects may prove to be interesting as test subjects.
It was interesting that with the CED2, light scatter from the air and/or the eyepiece was eradicated.
Other than the CA inherrent in an achromat, Venus had a very clean appearance.
Hi Sol,
Yes, long wait for Jupiter.
Did you notice any difference in brightness (transmission) from center to edge? I am guessing there is some gradient in coatings from center to edge. It's just my wild guess.
I may be totally off base 
Recently, I compared very good wide AFOV eyepiece to excellent planetary eyepiece in light scatter and contrast. I saw Venus something similar to the first sketch (stock diagonal one) in very good wide AFOV eyepiece.
Then I saw something similar to your sketch with CED2 in excellent planetary eyepiece. I was a little bit stunned at the obvious difference. I realized that I've been missing something.
I observed similar result with the full Moon. I saw more details on bright Moon surface with the planetary eyepiece. I used to stay away from the full Moon but not any more
I haven't repeated the observation yet so I can't say it for sure, just seeing difference or something.
That's why I was curious about the full Moon. Let us know how you see when you get a chance to observe the full Moon with CED.
Tammy
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Sol Robbins
Carpal Tunnel
Reged: 12/01/03
Posts: 1609
|
|
Quote:
Did you notice any difference in brightness (transmission) from center to edge? I am guessing there is some gradient in coatings from center to edge. It's just my wild guess.
I may be totally off base
Recently, I compared very good wide AFOV eyepiece to excellent planetary eyepiece in light scatter and contrast. I saw Venus something similar to the first sketch (stock diagonal one) in very good wide AFOV eyepiece.
Tammy
Tamiji,
I did not see any differences in brightness anywhere in the FOV. Venus moved around quite bit as I can't accurately polar align when its still light outside.
Thanks,
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S.R.
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Sol Robbins
Carpal Tunnel
Reged: 12/01/03
Posts: 1609
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Using all my diagonals for the 3 way comparison on Venus showed the CED2 was the clear winner.
Here's a sketch made Last night using the CED1 for Saturn. The Type 1 version was the clear winner for Saturn showing detail better than either a regular diagonal or the too dark CED2.
I hope you find it interesting.
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S.R.
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