Telrad Reflex Sight with Mounting Base

BH #TERSIGHT • MFR #1001
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Telrad Reflex Sight with Mounting Base
Key Features
  • Provides Unmagnified True View of Sky
  • Red Triple Concentric Ring Reticle
  • Large 2.5x1.4" Viewing Window
  • Precise Infinitely-Adjustable Rheostat
Invented in the 70's the Telrad Reflex Sight was the first of a new kind of finder available to amateur astronomers. Outfitted with a generous 2.5x1.4" viewing window it provides a wide unmagnified true view of the sky — unlike conventional finder scopes that offer limited fields of view presented upside-down and backwards. Three concentric rings — spaced at 4°, 2°, and 0.5° — provides an easy point of reference for locating objects and quick navigation when manually star-hopping. An easy-to-use, infinitely-adjustable rheostat enables precise brightness control so users won't hurt their night-adjusted vision. A mounting base is included, and the sight easily detaches from it for storage or to move it to another OTA with a separate mounting base already attached without requiring it to be re-centered with the OTA.
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Telrad 1001 Overview

Invented in the 70's the Telrad Reflex Sight was the first of a new kind of finder available to amateur astronomers. Outfitted with a generous 2.5x1.4" viewing window it provides a wide unmagnified true view of the sky — unlike conventional finder scopes that offer limited fields of view presented upside-down and backwards. Three concentric rings — spaced at 4°, 2°, and 0.5° — provides an easy point of reference for locating objects and quick navigation when manually star-hopping. An easy-to-use, infinitely-adjustable rheostat enables precise brightness control so users won't hurt their night-adjusted vision. A mounting base is included, and the sight easily detaches from it for storage or to move it to another OTA with a separate mounting base already attached without requiring it to be re-centered with the OTA.

Performance
  • Wide unmagnified field of view
  • Generous 2.5x1.4" viewing window
  • Long eye relief
  • Zero parallax
  • Provides uncluttered, correct 'real sky' view for quick manual sighting of known objects like planets, stars, clusters, and galaxies
Reticle
  • Red illumination makes reticle clearly visible without affecting night-adjusted vision
  • Three concentric circles set at 4°, 2°, and 0.5° to help 'star hopping'
  • Infinitely-adjustable rheostat allows for precise illumination control
Use and Handling
  • Quick detachment from mounting base enables it to be removed and installed quickly without re-calibration
  • Runs on two user-supplied AA batteries
  • Weight: 9 ounces without mount
UPC: 728028434378

Telrad 1001 Specs

Viewing Window
2.5 x 1.4" / 6.4 x 3.6 cm
Reticle
Three concentric rings
Battery
2 x AA batteries
Dimensions
Unmounted: 8.1 x 4.5 x 1.8" / 20.6 x 11.4 x 4.4 cm
With Mounting Base: 8.1 x 5.0" x 1.75 / 20.6 x 12.7 x 4.4 cm
Footprint of Mounting Base: 6.8 x 2.3" / 17.1 x 5.8 cm
Weight
With Mounting Base: 11.0 oz / 311.8 g, without batteries
Without Mounting Base: 9.0 oz / 255.1 g, without batteries
Packaging Info
Package Weight
0.905 lb
Box Dimensions (LxWxH)
9.85 x 6.1 x 3.45"

Telrad 1001 Reviews

Looked through it the wrong way

By Bruce
Rated 5 out of 5
Date: 2025-05-01

The Telrad is a game changer for locating objects in the night sky. You just need to look through it the correct direction. I missed that information somehow and sent one back reporting that it did not turn on. Now I am sure It did!. I messed up. Be sure to have it pointed so that the larger part at the left in the photo is TOWARD your eye. Works Great now.

better than any finder out there!

By Joe
Rated 5 out of 5
Date: 2024-02-12

I've been using Telrads for many years and even though I have 3 different finders on my two rigs (4 scopes, from 2 refractors to 2 large SCT's) I still rely on my 2 Telrads to get me where I'm going. Simple, cheap, and reliable.

See any errors on this page?

cAN THIS BE MOUNTED ON A SMALL REFRASCTOR?

cAN THIS BE MOUNTED ON A SMALL REFRASCTOR?
Asked by: Enrico
The Telrad Reflex Sight with Mounting Base (B&H # TERSIGHT) should mount on just about any curved surface with the included double-sided adhesive tapes or via the two pre-drilled mounting holes.
Answered by: Michael S
Date published: 2026-01-19

How to mount to Celestron 20x70 Binocs?

How to mount to Celestron 20x70 Binocs?
Asked by: Blaine
I attached it to a spotting scope by using two large (about 3") hose clamps to secure the base to the scope. It worked well. I would think that you could attach it to one side of the binos the same way. This made lining up the scope to the moon, planets, and other stuff much, much easier. You might put a piece of cloth between the clamps and the binos to avoid scratching the surface.
Answered by: Richard
Date published: 2021-02-23

Will this be able to mount on a Celestron 8SE?

Will this be able to mount on a Celestron 8SE?
Asked by: Diane
The Telrad Reflex Sight with Mounting Base BH #TERSIGHT • MFR #1001 can be mounted
Answered by: John
Date published: 2020-10-28

question

Will this telrad be able to mount to an orion dob? Or will I need a special adaptor?
Asked by: Steve P.
The mounting base will mount to anything with a curved surface. It uses 2 strips of double sided tape (pre-attached). Just peel and press. It also has 2 pre drilled holes if you want to secure it with screws. There is a slight issue with it: the mounting surfaces are angled slightly toward each other, to better fit a curved surface. If you try to mount this on a flat surface (using only the tape) not all of the tape will make contact, weakening the joint. With a Dob, screwing it in is your best bet. Just remember to angle your tube down when you do this, to avoid accidentally dropping something on your mirror! Otherwise, this is an awesome finder. I also use the 4 extender to give me a little more headroom. Hope this helps.
Answered by: Kevin S.
Date published: 2026-01-19
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