GSO 8x50mm Straight Through Achromatic Finder - Black

Our #: OFIN-GS-GS850-B
Mfg #: GS850-B
Our Price: $52.00
Free shipping for this item in the US
More Info

Contiguous US Customers:
All items we sell ship for free within the Contiguous US. Shipping will be via the cheapest shipping method which will vary depending on the items in your order. During checkout, you may also be shown other optional faster shipping choices.

US Customers in Hawaii and Alaska:
Free shipping applies to almost all products. A few large telescopes and mounts are excluded from this free shipping offer. For these items, please contact us to obtain a shipping quote before you check out using the online shopping cart.

International Customers:
Free shipping does not apply to international orders. During check-out, you will be presented with several shipping choices and costs. However, the export of some items may be restricted outside the US due to size or manufacturer restrictions.

In Stock (10+ Available)
Stock listed above is accurate & shown in real time
Ships by Next Business Day

Quick Overview

  • High quality 8x50 finder makes it easier to hunt faint objects with your telescope
  • Large 50 mm aperture lets you star hop using fainter stars and see many deep-sky objects directly
  • Large field of view makes it easy to pick out fainter guidepost stars
  • Made with machined aluminum tube with glossy black finish
  • Presents a traditional inverted reversed image

Product Details

Replace the small 24mm or 30mm finder telescope that came with your telescope with this excellent 50mm achromatic finder! With this finder, you will actually start seeing many of the faint fuzzies you're searching for. This same finder is sold by one of the "Big Three" telescope companies and several other smaller companies under their own brand names for significantly higher prices.

This is a very high quality yet economical finder. It features a multi-coated achromatic objective and single eyepiece cross-hairs that allow for precise centering of faint objects. This finder provides an inverted, reversed image and has a black tube finish with black dewshield/eyepiece as shown in the accompanying photo. The finder comes with two plastic end caps. The eyepiece body is made of high-quality molded ABS plastic. The rest of the finder is beautifully CNC-machined from aluminum and powder coated to a glossy finish. The inside of the tube is painted a flat black and the inside of the dewshield features v-grooves to minimize spurious reflections and maximize contrast.

To focus the finder:
(i) Turn the focus lock ring (on the tube right behind the dewshield) towards the eyepiece as far back as it will go.
(ii) Turn the objective dewshield in either direction until you reach focus while looking into the eyepiece.
(iii) Turn the focus lock ring towards the dewshield until it locks into place and can turn no farther. Focus will be locked in this position.
Please note: The eyepiece crosshairs are not focusable.

You can purchase an optional GSO quick-release dovetail bracket and a variety of dovetail bases for different applications. Or you can mount the finder in your own 50mm finder bracket if the bracket has an inner diameter larger than 53mm.

Specifications:
Total length = 239mm (9.41")
Weight = 10.8 oz
Tube diameter = 53mm (2.09")
Dewshield diameter = 58mm (2.28")
Made in Taiwan

Other Information

  • Country of Manufacture: Taiwan