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Celestron 90° Dielectric Star Diagonal with Twist-Lock (1.25")

BH #CEDSDTL125 • MFR #93571
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Celestron 90° Dielectric Star Diagonal with Twist-Lock (1.25")
Key Features
  • 1.25" Nose Piece and Holder
  • BK7 Glass, Diffraction-Limited Optics
  • 58-Layer Dielectric Coatings
  • Over 99% Reflective Mirror Surfaces
Enjoy better views through your telescope and change eyepieces and accessories faster and more easily with the Celestron 90° Dielectric Star Diagonal. The diagonal has a 1.25" nosepiece and holder to make it compatible with the most popular size of gear from eyepieces to Barlows, filters, and a near-infinite array of accessories.
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$144.95
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Celestron 93571 Overview

Enjoy better views through your telescope and change eyepieces and accessories faster and more easily with the Celestron 90° Dielectric Star Diagonal. The diagonal has a 1.25" nosepiece and holder to make it compatible with the most popular size of gear from eyepieces to Barlows, filters, and a near-infinite array of accessories.

Designed with diffraction-limiting optics, its BK7 mirror is treated with 58 layers of dielectric coatings that produce a reflective surface greater than 99% so more incoming light makes it to your eye—this is especially important when viewing dim deep-sky objects where every photon of light is important.

For the eyepiece holder side of the diagonal, Celestron eschews convention and replaces the ubiquitous three thumbscrews to tighten the interior compression ring with a twist-lock. Utilizing a twist-lock not only makes swapping your eyepieces and accessories faster and easier, it properly centers the eyepiece and maintains proper optical alignment. The nosepiece is outfitted with standard filter threads so you can install your favorite filter—like a moon, nebula, or light pollution—without having to move it from one eyepiece to another as you go about your observation sessions. The aluminum housing has a black anodized finish, and the interior is painted flat black with blackened threads to reduce reflections.

UPC: 050234935715

Celestron 93571 Specs

Eyepiece Barrel Diameter
1.25"
Materials
Glass: BK7
Housing: Aluminum
Dimensions
4.5 x 3.5 x 2.0" (114.3 x 88.9 x 50.8mm)
Weight
7.5 oz (212.6 g)
Packaging Info
Package Weight
0.665 lb
Box Dimensions (LxWxH)
5.3 x 4.4 x 3.7"

Celestron 93571 Reviews

Excellent star diagonal with click-lock feature

By Craig
Rated 5 out of 5
Date: 2024-05-28

I bought this to replace the standard star diagonal that came with my Celestron CPC-1100 telescope. The main reason I purchased this was for the twist-lock (or click-lock) feature. I hated the set screws used in traditional star diagonals, which make changing eyepieces less then desirable. This is especially true in colder weather. This star diagonal makes swapping out eyepieces easy!

Excellent Diagonal

By Mahesh
Rated 5 out of 5
Date: 2021-03-28

The diagonal is a very good quality product from celestron. BandH order processing and shipping was fantastic too.

See any errors on this page?

How does it change the up/down, left/right view ...

How does it change the up/down, left/right view of the image?
Asked by: Terrence
The Celestron 90° Dielectric Star Diagonal with Twist-Lock (1.25") does not have the ability to change the view. It is not an erect image diagonal.
Answered by: Dan W
Date published: 2024-05-21
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