Alstar 1.25" 90-Degree Erecting Prism Optical Prism Inside Rather Than a Mirror which Makes Your Image Clear and Sharp

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Alstar 1.25" 90-Degree Erecting Prism Optical Prism Inside Rather Than a Mirror which Makes Your Image Clear and Sharp

Regular Price: US$75.00

Special Price US$59.99

Availability: In stock

Supplier: Alstar

Category: Electronics Camera & Photo Accessories Telescope & Microscope Accessories Telescope Accessories Diagonals

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1.25" 90-degree diagonal features an image erecting prism that allows you to look into a telescope at a 90 degree angle.

It produces an image that is oriented properly, which means that the image is upright and correct from left to right (i.e., a correct, non-inverted, non-reversed image).
This is a great diagonal for daytime terrestrial use with small telescopes or spotting scopes. It can also be used for astronomy applications, especially when you would like to match the orientation of the star field with "correct" star maps and charts.
The prism housing is made of precision molded ABS plastic and the two end barrels are precision machined from aluminum. The 1.25" nosepiece is threaded to accept standard 1.25" astronomy filters.
Please Note: This diagonal can only be used with refractor telescopes and some catadioptric telescopes like Schmidt-Cassegrain, Maksutov-Cassegrain, etc. It not meant for use with Newtonian / Dobsonian reflector telescopes or other variants of Newtonian telescopes.

Advantages in a nutshell

With this diagonal you can match the orientation of the star field with "correct" star maps and charts. It produces an image that is oriented properly, which means that the image is upright but reversed left to right.
This is a great diagonal for daytime terrestrial use and night time astronomy applications for telescopes or spotting scopes.
More comfortable viewing orientation as you observe from above, filter thread for any 1.25" filter. Accepts standard 1.25" eyepieces.
High quality optical Prism inside rather than a mirror which makes your image clear and sharp.
Economical 1.25" 90-deg prism diagonal for astronomical telescopes and spotting scopes.

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- We are Alstar, a young team with full of energy and enthusiasm both in life and in the industry we are engaged in. From 2015, we have been committed to providing professional optical products for friends who loves astronomy and natural exploration.
- We believe that astronomy exploration is not only a hobby, but also something that can bring us value in education and life. Let ordinary people have access to astronomy more easily, that's what we do.

Economical 1.25" 90-deg prism diagonal for astronomical telescopes and spotting scopes. High quality optical Prism inside rather than a mirror which makes your image clear and sharp. More comfortable viewing orientation as you observe from above, filter thread for any 1.25" filter. Accepts standard 1.25" eyepieces. This is a great diagonal for daytime terrestrial use and night time astronomy applications for telescopes or spotting scopes. With this diagonal you can match the orientation of the star field with "correct" star maps and charts. It produces an image that is oriented properly, which means that the image is upright but reversed left to right.

Item Weight: 4.6 Ounces. Finderscope: Reflex. Focus Type: Manual Focus. Telescope Mount Description: Altazimuth Mount. Objective Lens Diameter: 1.25 Inches. Eye Piece Lens Description: Prism. Brand: Alstar. Manufacturer: Alstar. Date First Available: July 30, 2017. Is Discontinued By Manufacturer: No. Best Sellers Rank: #9 in Telescope Diagonals. Customer Reviews: 4.0 out of 5 stars 13 ratings 4.0 out of 5 stars. Item model number: SKU_AM_EP1D90AR. : B074DQR9ZN. Item Weight: 4.6 ounces. Product Dimensions: 4.4 x 2.1 x 2.8 inches.