Explore Scientific AR 102
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Optolong LRGB Filter Testing and Comparison wit...
Sep 22 2015 01:41 PM by turbo399
Sometimes an equipment purchase is forced upon you by urgent necessity. Such was the case when I was forced to obtain a replacement for my home-built 10x50 finder made from an old vinyl sports bottle, electrical tape, s****s of wood for the
Since I found that my Celestron Star Pointer (see another article) is inadequate for my C8, I proceed to search for better alternatives. The Telrad and the Rigel Quick Finder are the natural choices, I bought both of them since the shipping cost is too high if I order only one item. I have a 6x30 finder which comes with the C8 OTA, but since the bracket cannot be removed from the OTA easily, I found it not so portable. At the same time, I'm used to use a unit finder, and that's why I go for these two infamous unit finders. P.S: I sold my 6x30 Celestron LER finder soon after I got my Rigel Quick Finder. The Package and the Options The Telrad comes with a single base, variable brightness control, no battery, and 3 concentric circles of 0.5 degree, 2 degree and 4 degree. It is longer and heavier than the Rigel Quick Finder. The Rigel Quick Finder comes with two bases, variable brightness control, Lithium battery included, and 2 concentric circles of 0.5 degree and 2 degree. The blinking reticle is a standard feature in the Rigel Quick Finder. It is shorter and lighter than the Telrad, but since it stands on its base, it is actually taller when in operation. The switches on the Telrad are larger and better placed, so it's easier to use and more accessible. The switches on the Rigel Quick Finder are located on the opposite side when it is in operation, however, I have to say, both are very easy to use. The Telrad uses standard AA battery and the Rigel Quick Finder uses CR2320 Lithium battery. With the Telrad, you have to provide your own battery and with the Rigel Quick Finder, you have them included in the package. There are three alignment switches for both of them for alignment.
For a long time I have enjoyed the use of "unit power finders". I purchased my first TelRad almost two decades ago and have been modifying BB-gun red dot sights to use with telescopes for several years. The TelRad is especially useful on scopes with a focal length of 1000mm or more. The red dot sight is much more compact, much less expensive and works just fine with shorter focal length scopes and big binoculars.
Unit Power Finders, Reflex Finders, Reticule Finders and Red Dot Finders or RDF’s call them by any name you like, many amateurs today have one of these units on their scope. For some, it replaces the traditional optical finder scope, for others it supplements it. Depending on the size and the focal ratio of the telescope, I personally find that I