Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Enjoy free shipping during the holidays! Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC and to all U.S. Military APO/FPO/DPO addresses.

Enjoy Our Extended FREE RETURNS

We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later). We'll even cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Questions & Answers
Is this Erect Image 1 1/4” Diagonal compatible with the NexStar 4SE ? Expert Answer

Yes, it is.

by Tiffany S., Gear Expert, November 14, 2019
Customer Reviews
Helpful Positive Review
Excellent Addition by Legacy Reviewer, Verified Owner, January 19, 2010
Great addition if you only have a 45 degree. Great 90 and good price too. Pros: Excellent Cons: None
1/1 found this helpful
Helpful Positive Review
Easy to use by Legacy Reviewer, Verified Owner, April 30, 2009
I use the scope sometimes for terrestrial viewing. This diagonal makes it possible. Its also vey nice to have the angle when needed for astronomical work. Good value. Pros: Erect Image makes orientation simple for casual viewers Cons: None
2/2 found this helpful
Most Recent Reviews
Star Diagonal by Joe, December 19, 2015
This product was a big disappointment to me. It is improperly labeled as an ERECT IMAGE diagonal. It is NOT! The description should read: 'Celestron 1.25" STAR DIAGONAL' because it reverses the image -- there is no prism to properly erect it -- ...
Read More...
0/1 found this helpful
Most Recent Reviews
Gustave by Legacy Reviewer, January 18, 2010
I received eye piece which was well packaged and in very timely before the holidays. Thank you -- Gus
Read All 4 Reviews
2 Models Available
Field of View, Angle
All
Search

Product Info for Celestron Telescopes Erect Image 1-1/4" Diagonals

Celestron Telescopes Erect Image 1-1/4 " Diagonals are an Amici prism design. This design allows you to look into the your Celestron Telescope at a 45° angle, at images that are oriented properly, meaning the image is upright and correct from left to right. Use of Celestron 's .96" to 1-1/4" 45° Erect Image Diagonal on a telescope equipped with .96" eyepieces means greater versatility. This Diagonal will allow you to use 1-1/4" eyepieces , to obtain a larger field of view and better eye relief. A 90° 1.25" Erect Image Diagonal is available for those who prefer that angle. 1 - 1/4" Star Diagonal lets you view objects that are at a 90° angle from the direction the telescope is pointing, thereby allowing comfortable viewing when the telescope is pointed at, or near, the zenith (i.e. directly overhead). The resulting image is right side up, but will be reversed from left to right.image

WARNING: California`s Proposition 65

Specifications for Celestron Telescopes Erect Image 1-1/4" Diagonals:

Manufacturer: Celestron
Condition: New

Features of Celestron Telescopes Erect Image 1 - 1/4 " Diagonals:

  • Allows you to look into your Telescope at a 45° or 90° angle
  • Image is upright and correct from left to right

Package Contents:

  • Celestron Telescopes Erect Image 1-1/4" Diagonal

Celestron Telescopes Erect Image 1-1/4" Diagonals Orderable Models

List of Orderable Models

  • Celestron Telescopes Erect Image 1-1/4" Diagonals, Items Diagonal, Star - 90 degree 1-1/4'' , MPN: 94115-A , UPC: 050234941150 , Code: CI-TA-DIAGONAL-94115-A
  • Celestron Telescopes Erect Image 1-1/4" Diagonals, Items Diagonal, Erect Image - 45 degree 1-1/4'' , MPN: 94112-A , UPC: 050234941129 , Code: CI-TA-DIAGONAL-94112-A
Compare (0)