80mm quick release bracket for SCTs

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This lightweight (6.4 ounce) quick-release Antares finderscope bracket is designed to mount 80mm Antares right-angle finders on all Celestron and Meade catadioptric telescopes 7” in aperture and larger, but will also hold virtually any 80mm finder on almost any scope. The internal diameter of the rings is 91mm. The plastic collimating screws will hold tubes as small as 75mm in diameter, but 80mm is a more practical lower limit to allow some screw travel for collimation purposes.

The quick release base has two slots that line up with the finder bracket mounting holes on the rear cell of a catadioptric telescope (Schmidt-Cassegrain, Maksutov-Cassegrain, “Advanced Ritchey-Chrétien,” etc.) It attaches semi-permanently using the bolts supplied with the original telescope finder bracket (new bolts are not supplied with the quick release). The quick release base can also be attached to a reflector’s Sonotube or metal optical tube by using nuts and bolts (not supplied), although it may require drilling a new hole in the optical tube if the existing tube hole spacing does not match the mounting hole spacing in the quick release base.

The 9” diameter curvature of the quick release base will fit virtually any catadioptric or reflector telescope 8” in aperture and larger. The curvature of the finder base will not let it fit completely flush on 10” and larger diameter scopes, but the small gap under the center of the bracket and the telescope rear cell will only be cosmetic and will not affect finder performance or collimation.

The ring portion of the bracket has two finder mounting rings, spaced 2.35” apart, each with three hand-tighten plastic collimating screws. The ring portion slides into a dovetail slot in the base and is held in place by one plastic hand-tighten knob. A stop in the base fits into a groove in the ring portion to lock the ring portion in place and prevent the finder from sliding out of the bracket. Die-cast metal, painted black.

The weight of this product.
6.4 oz.
1 year
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Overall Product Rating: AstronomicsAstronomicsAstronomicsAstronomicsAstronomics(4.00)   # of Ratings: 2   (Only registered customers can rate)

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1. Jim on 4/30/2013, said: AstronomicsAstronomicsAstronomicsAstronomicsAstronomics
ST80 OWNERS! THIS WON'T WORK FOR YOU! This item, in the right situation, deserves five stars. The build quality is excellent. The unit I received has no slop at all, but is very tight. I am giving 4 stars instead of 5, because the description of the item could be improved. The recommended scopes for this ring are up to 75mm, but the description states that 80mm scopes may also work. Not so. I bought this to mount my Orion ST80 onto my C8, but found that the ST80 simply does not fit all in these rings. To leave an adequate dimension of adjustment with the setting screws, I believe it is wiser to recommend this unit for 60 to 70mm scopes and nothing larger. A photo of this unit with a 70mm finderscope inserted would help the customer in visualizing how this might work with his/her equipment.
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2. Matthew on 3/11/2013, said: AstronomicsAstronomicsAstronomicsAstronomicsAstronomics
Don't worry about the fit of the base on larger SCTs - it fits on my old C11, no problem. There's more slop within the rail/base fit than I'd like, though. Hand-tightening the nylon thumbscrew that holds the bar in place within the base isn't good enough to eliminate the slop - fortunately the thumbscrew is also slotted to allow tightening with a screwdriver. I wonder about long term durability having to crank the thumbscrew so hard to keep everything tight.
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Antares - 80mm quick release bracket for SCTs

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Antares - 80mm quick release bracket for SCTsImage showing dovetail base and separate quick release rings.
 AstronomicsAstronomicsAstronomicsAstronomicsAstronomics (Average: 4.00 | Users: 2)  Only registered users can submit ratings - Register Here
Our Product #: 80QRB
Manufacturer Product #: F80DTB
Price: $64.95
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This Antares lightweight quick-release finderscope bracket mounts virtually any 80mm finderscope on almost any telescope (including Celestron and Meade catadioptric telescopes 7” in aperture and larger) . . .

. . . our 37th year