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This is typical for all Amici (rrof) prisms, similar to the spikes of a Newtonian telescope, but much weaker.
Any reflecting telescope with classic coatings can attain a lifetime of 20 or 30 years - correct handling provided. The same accounts for our protected silver-coatings, whereas the position of a stardiagonal within the optical train does provide much better protection against environmental influences, compared to the exposed surface of a primary telescope mirror.
We do regard the benefit of the BBHS hardsilver coating to be quite noticeable, compared to the reduced spectral range offered by a dielectric coating. Please check in the Internet for statements that would verify our position. Or look for the very extensive tests on star diagonals, performed by William Paolini (see tab "Downloads".
Please read more on the properties of our star diagonals and our design philosophy here: http://www.baader-planetarium.com/en/blog/baader-bbhs-reflective-properties/
The amici/roof prisms that we supply with the BBHS-coating all are made according to the original optical specifications by Carl Zeiss. This is the reason for the high optical quality - good enough for high magnification work ( - and for the price as well).
So now I wonder if I can fit the in Baader 2"/90° Astro Amici-Prism to the telescope in the same way, or if I need some kind of adapter also? If so, what?
It is this type of telescope https://www.astroshop.eu/telescopes/intesmicro-maksutov-telescope-mc-150-1500-alter-m603-ota/p,6551#specifications. I really like it, and I like Baader products also, so to combine this diagonal with this telescope sounds like a good idea!
Kind regards, Best wishes,
The Clicklockk is held in place with the tiny screws at the side, but the noseiece is only screwed onto the body. It is the part Baader 2" Safety Kerf nosepiece with 2" filter thread # 2408156 with a regular thread (an SC-thread).
In order to reduce the length of the setup on my Celestron C8, I would like to mount the UFC at the exit of the prism.
As I don't understand why the clicklock is fixed only with the 6 small screws (which does not allow me to use the 4 elements that I put at the entrance) instead of using the threading, can you tell me what I have to acquire to put the UFC at exit ?
If you want to use a binoviewer with correct orientation, we recommend the much shorter Baader T-2 / 90° Baader Roof-Prism with BBHS ® coating (T-2 part #02) # 2456130. Then, you can use the T-2-threads for a 1.25" or 2" nosepiece to attach it to the telescope, and use either the T-thread or a Baader Heavy Duty T-2 QuickChanger (T-2 part #06A) # 2456313A to attach the bino-viewer, and get along with a shorter glasspath corrector.
Of course, it will usually end up in an uncomfortable position - but we offer the NexStar Locking Ring 2458270 which works as counter nut.
To attach the prism housing to your telescope, you may have to unscrew the eyepiece clamp, because otherwise it may hit the focus knob when you screw the prism onto the telescope.
amici prism fully. Now just turn back to your appropriete position, maybe up-rigt, then turn back the locking ring to fix this position.
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|Net weight (kg)||0.66|
|Optical Design||Erecting Prism|
|Inner Connection (lens sided)||Thread, M48, M55, 2" (50,8mm)|
|Outer Connection (lens sided)||Barrel, Dovetail ring, S58, 2" (50,8mm)|
|Inner Connection (eyepiece/-camera-sided)||Thread, Clamp, M55, 2" (50,8mm)|
|Reflection surface||Sealed BBHS coating|
|Prism Glass (Type)||BaK-4|
|Glas path||70 mm|
|AR-Coating||Phantom Coating® Group|
|Image Orientation||Erect image, Non-reversed|
|Optical length (mm)||85|
|Inner Diameter / Clear Aperture (mm)||44|