Baader Item #2958027
Hyperion 2" Finetuning Stop Ring (with internal brass compression ring) is an additional accessory for the Baader Hyperion eyepieces. It is to be used when observing with a 2" mirror or prism star diagonal and prevents the 1.25" eyepiece barrel from hitting and damaging the mirror star diagonal or prism, whenever additional Finetuning Rings are lengthening the original eyepiece body. The second photo above demonstrates the combination of a Hyperion eyepiece, a 14mm finetuning ring, a 2" stop ring and a 2" diagonal mirror.
Of course, the use of this item is not restricted to Baader eyepieces only. It can also be used as a premium 2" parfocalizing ring with any brand of 2" eyepiece or 2" astronomy accessory. Features two large clamping thumbscrews for quick, no-tools hand use; virtually all other parfocalizing rings on the market use cumbersome set screws requiring allen keys for loosening/tightening.
Apr 10, 2017
Works GreatPros: Cons: Comments:
Needed to provide a little extra back-focus for eyepieces used with a Newtonian reflector. Very easy to slip on and off and adjust position or move from one eyepiece to another. Quality construction including brass compression ring. It works just like it's supposed to.
This review was provided courtesy of AgenaAstro.comNov 30, 2012
A must have toolPros:
Easy to Use,Lightweight,Compact,Accurate,Strong ConstructionCons: Comments:
If you have Hyperion eyepieces with finetuning rings, and use them in a 2" diagonal, this is a must have item.
This review was provided courtesy of AgenaAstro.comJun 5, 2011
I'll get more of thesePros:
Strong ConstructionCons: Comments:
My telescope focuser just doesn't have the travel to make every eyepiece work. This adjustment ring mounted on the barrel of my (big) 2" eyepiece allows me to just stick it in, focus, and voila. I'll get more. Really worth it.
This review was provided courtesy of AgenaAstro.comJan 2, 2011
Approved, small concerns / alternativesPros:
Compact,Strong Construction,Soft on barrel surfacesCons: Comments:
Keeps filters from touching the diagonal mirror. The tightening system is great. Fits best on the largest diameter of the eyepiece barrel (not very long on hyperion eyepieces, so placement is limited for good stability). Evaluate a barrel extender as an alternative.
This review was provided courtesy of AgenaAstro.comAug 30, 2009
Excellent ring but a bit priceyPros:
Strong Construction,AccurateCons: Comments:
These are excellent rings but a bit pricey. The only down side is that the thumb screw sticks out if you want to leave this ring semi-permanently attached to your eyepiece.
On the other hand it makes field adjustments very easy.
This review was provided courtesy of AgenaAstro.comSort by