Orion 20-Inch Twist-Tight Dielectric Mirror Star Diagonal, Black, Medium 40902

Orion 20-Inch Twist-Tight Dielectric Mirror Star Diagonal, Black, Medium 40902

$ 169.99

Score By Feature

Based on 20 ratings

Value for money

9.68

Easy to use

9.78

Sturdiness

9.89

OveReview Final Score

How Our Score Is Calculated

Product Description

Mirror diagonal is 2 inches in length and 90 degrees in angle features sophisticated dielectric coatings that provide 99% reflection

The twist-tight clamping mechanism grips the eyepieces with more security than usual diagonals with thumbscrews - without causing

A dielectric mirror coating provides a more reflective surface for greater brightness and contrast than enhanced aluminum coatings while being more durable

Featuring machine-threaded glare baffles for optimum performance, this aluminum housing has been machined and anodized

Upon request, the nosepiece barrel can accommodate a step-down of 2"-1 as well as 2" Orion filters. This item comes with a 25" adapter

Questions & Answers

What is the compatibility between the Orion 40902 and the Celestron Nexstar Evolution ?

The bid is for a two-story building This Nexstar 9 evolves from the Nexstar evolution 8 with a one-inch hole. This is not going to fit through a 25 inch hole, so they'll need to make an adapter for this. Nowadays, these are pretty much the 2 main standard sizes that most telescopes use, they're pretty much all either 1 or 2 in size. Twenty-five per cent or two per cent

Hello world! Do you know if it will work on the Celestron 8SE?

In fact, yes. A 9-inch mount is mounted on mine. The celestron ST 25

Having a 9 would be ideal. The diagonal on this clock is not compatible with the Celestron Evo 25". Is there any kind of adapter I need to connect?

If you do not have a 2" SCT Visual Back, you won't be able to see. It appears that the Baader 2" SCT Click-style is all you need on your 8" Edge HD Lite-Lock Visual Back (with two inches of SCT thread) *br>If you wish to connect a diagonal to your scope, you can do so directly. You can find "sct diagonal" by searching for it

Selected User Reviews For Orion 20-Inch Twist-Tight Dielectric Mirror Star Diagonal, Black, Medium 40902

A ring that compresses significantly faster and with greater security

5/5

There are a number of benefits to this over the more expensive Baader Planetarium clicklock diagonal, not least of which is that it comes with the 2 to 1 ratio. A 25-inch adapter is $50 less than the one without an adapter that comes with the Baader diagonal. I am certain that the Baader is worth the extra money, but I would rather use that money.

Madeleine Compton

| Sep 05, 2020

It would be a nice addition to my Nexstar EVO 8 if it had a matching diagonal

4/5

A Baader Click Lock will be a very wise purchase if you don't already You do not get an adapter with it. The diagonal keeps the eyepieces firmly in place and allows them to be swapped As far as I can tell, everything is going well.

Angel Gill

| Nov 07, 2020

There is a diagonal in this

5/5

The twist lock system is similar to a company that sounds like Bard. The hold is not as refined, but it is still strong. The light is good and the clarity is nice. For the most part, I bought this to hold my DSLR without it slipping off my hand.

Kylee Compton

| Oct 31, 2020

You need this if you are using an SCT on a GEM! With the set screws and collar that you have to open and close with your Celestron diagonal on my EdgeHD 8, you already know that when the telescope spins around and goes upside down to sideways your eyepieces could fall out of the diagonal or swing downward

5/5

These combine perfectly with the Baader Fast Lock 2". I love them!.

Lilianna Welch

| Nov 27, 2020

I highly recommend this item at this price

5/5

It has superb For the price I paid of *210$, this is an unbeatable deal! It has a good mirror and a good twist lock. I have a Baader Planetarium 2 and 1 that work with this. There are 25" filters on this, so it works well.

Addisyn WESTON

| Mar 01, 2021

Replace your old locks with a Baader clicklock instead

3/5

This product is total junk
It doesn't screw in tight and takes many turns to reach this target
Typical Orion product
Get a Bauer instead.

Forrest Joyce

| Apr 29, 2021

Viewing the world through a different A quick and easy way to change

5/5

Mohammed Keith

| Feb 09, 2021

Dialectic Diagonal of Great Dialect

5/5

It's great to have a diagonal like this. It's great that it has a twist lock feature. I buy this diagonal for use with my low-end eyepieces, and it works.