Astro-Tech 10X50mm illuminated right angle correct image finder, white body with black trim


Availability: In stock

This white and black Astro-Tech correct image right angle illuminated 10x50mm finder is a user-friendly replacement for the often less-convenient straight-through inverted image finder supplied with many other telescopes . . .
Our Product #: ATF50WHB
Astro-Tech Product #: ATF50WHB

Product Description

This white and black Astro-Tech 10 x 50mm illuminated finderscope is an excellent finderscope. Its neutral off-white color and black trim will also let it replace the smaller finders that often come with other brands and types of scopes.

The image-erecting amici prism built into the Astro-Tech's right-angle diagonal gives you images that are correctly oriented (upright and right-reading), so that star patterns are seen exactly the way you see them on star charts and with your bare eye. This makes star-hopping from object to object using the Astro-Tech finder easier than with a mirror-image or inverted finderscope view.

The Astro-Tech's right-angle right-reading/erect image optics also allow you to view near the zenith in comfort with the finder, without having to turn your head upside down, as you do with the standard straight-through inverted-image finder supplied with most scopes.

The finder's image-erecting diagonal has precise helical focusing and a compression ring eyepiece holder. Both are premium touches rarely found in a finderscope. There is a dust cap for the eyepiece holder.

The finder's field of view is a full 5° and its 50mm aperture has a limiting magnitude of 11, fainter than the stars on any commercial star chart. This makes it easier for you to locate faint nebulas and galaxies.

Eye relief is a very long 20mm that is ideal for unvignetted eyeglass use. There's a rubber eyecup that rolls down for eyeglass use and rolls up to shield your eye from contrast-reducing ambient light when used without glasses.

The Astro-Tech finder weighs 26 ounces, including eyepiece and illuminator. The finder is aluminum, painted in a neutral off-white with an anodized black diagonal housing and trim. It is internally baffled for higher contrast.  

The Astro-Tech finder comes with a dual ring finder bracket.  The bracket includes 6 teflon tipped screws for non marring alignment adjustment.  The finder stalk has a vixen compatible foot and comes with an additional mounting shoe that will work on various other brands of telescopes.

The supplied single crosshair illuminated reticle eyepiece is removable and has a standard 1.25" barrel. This allows you to remove it from the finder and also use it for centering stars in your main optics for polar alignment and go-to system alignment, for collimating your finder precisely with your main optics, for lining up guide stars in a photoguide scope and/or targeting objects for astroimaging, etc. A diopter ring on the eyepiece allows you to focus the crosshairs precisely to match your eyesight.

The illuminator for the eyepiece crosshairs has a combined on/off switch and rotary variable brightness control. The illuminator uses common A76/LR44/SR44 button-type batteries (supplied) which are easily replaced when needed. While the manufacturer supplies batteries at no cost with this product as a convenience, the battery charge or useful life is not guaranteed. The batteries may arrive with their charge depleted or very low. In such a case, you will have to purchase replacement batteries locally, as battery life is not covered by the manufacturer's warranty.

Tech Details

Weight 26 oz.
Warranty 1 year


Review by:
I was pleasantly surprised by this finder scope. It comes with a mounting stalk to fit finder dovetail slots such as the one found on my Celestron Omni xlt 102. It was simple to align to the main scope and keeps alignment readily. The crosshairs that are present can be illuminated if you purchase the screw in LED. It is a huge step up from the straight through 6x30 finder that this telescope came with. This finder can be easily focused at the eyepiece and stars are sharp and bright. Together with a Rigel reflex sight, it is easy to locate objects now. It it has had a positive impact on my viewing. (Posted on 11/17/2023)
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