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72435

Re: Baader 2" Prism Diagonal?

Excellent! So where did you post the images you made? ... As usual, the devil is in the details. Since these errors are visible to the trained eye perhaps it
observe_m13
10:45 AM
#72435
 
72434

Re: Baader 2" Prism Diagonal?

A European dealer once told me that the Zeiss APQ was figured to expect a prism diagonal at the focuser and would show slight chromatic and spherical error
Alan Friedman
9:49 AM
#72434
 
72433

Re: Baader 2" Prism Diagonal?

As usual, the devil is in the details. Since these errors are visible to the trained eye perhaps it would be helpful to post in and out of focus star images
rockhead_20601
8:28 AM
#72433
 
72432

Re: Baader 2" Prism Diagonal?

The errors are visible to me because I know what I'm looking for, but to a normal observer, probably not. Rolando ... From: syzygy42@... [ap-ug]
uncarollo2
7:54 AM
#72432
 
72431

Re: Baader 2" Prism Diagonal?

"A prism adds a small amount of color error and spherical error. It depends on the focal ratio of the scope. faster scopes are more affected." Yes, but are
rockhead_20601
5:14 AM
#72431
 
72430

Re: Baader 2" Prism Diagonal?

Thank you, Roland! Bill
william78759
6:39 PM
#72430
 
72429

Jupiter 02/12 GRS

Condition was still variable today. The GRS is rising on this in this images. The GRS still has a strong color. There are a lot of rift activity on the NEB.
Christopher Go
4:29 PM
#72429
 
72428

Re: Baader 2" Prism Diagonal?

A prism adds a small amount of color error and spherical error. It depends on the focal ratio of the scope. faster scopes are more affected. Most mirror
uncarollo2
1:12 PM
#72428
 
72427

Baader 2" Prism Diagonal?

Is there any downside to using a high-quality prism diagonal (e.g., the Baader 2" prism diagonal) versus a high-quality mirror diagonal (e.g., the
william78759
Feb 12
#72427
 
72426

Just got my Parts

I just received my 22.4 mm extension tube and 2.7 to 2 inch adapter with the 3 thumb screws today. It is nice to be able go to a vendor and get accessory
deitzelj
Feb 11
#72426
 
72425

Re: Serial Number location

They are written on the side of the glass. Rolando ... From: dave@... [ap-ug] To: ap-ug Sent: Thu,
uncarollo2
Feb 11
#72425
 
72424

Serial Number location

Where do you find the serial number for a new 130 gtx? What about on an older 1987 starfire triplet? Thanks. Dave
wolfman_4_ever
Feb 11
#72424
 
72423

Re: Today's APOD

Congrats Bernhard. Well done! Chris ... From: "b.hubl@... [ap-ug]" To: Sent: Thursday, February 11, 2016
Chris Cook
Feb 11
#72423
 
72422

Re: Today's APOD

Hello Bernhard, It's always fun to see your images from Chile. I have happy memories of spending many nights at the Hacienda under the incredible night skies.
uncarollo2
Feb 11
#72422
 
72421

Re: Today's APOD

Hello uncarollo2, Pete and Jerry! Thank you very much for your nice words! We are very happy! best Bernhard Hubl www.ccdguide.com http://www.ccdguide.com
hubble_at
Feb 11
#72421
 
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