Antares 0.965"/1.25" 90-deg Hybrid Prism Diagonal
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
Stock count is accurate & shown in real time.
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
Contiguous US / Lower 48:
Free shipping applies to orders over $50 using our chosen carrier/method. Faster paid options are available at checkout.
Alaska, Hawaii & US Territories:
Free shipping applies to many—but not all—products. Enter your ZIP code in cart or upon checkout to confirm options and costs.
International:
International orders do not qualify for free shipping. Shipping, duties, brokerage, tariffs, and taxes are the customer’s responsibility. Some items may be restricted due to export, size, or manufacturer limitations.
New version with larger MgF2 coated 26mm prism.
The Antares EID90H hybrid correct image prism star diagonal provides convenient right angle viewing with refractors and cassegrains. The input barrel diameter is the Japan standard 0.965" and the receiver allows for use of 1.25" eyepieces and accessories. The prism housing is made of high grade ABS plastic and the 1.25" and 0.965" barrels are made from precision machined aluminum. Comes with one 1.25" dust plug. Weight: 4.3oz.
Important Notes: The length of the 0.965" aluminium nosepiece is 22mm (0.87"). Before purchasing, please make sure that the thumbscrew on your telescope is within this distance from the rear end of your focuser drawtube. Otherwise, the thumbscrew will not be able to engage and lock the diagonal. This is a known issue with some vintage telescopes in which the locking thumbscrew on the telescope is recessed by more than 0.87", and this diagonal will not work for you.
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.
New version with larger MgF2 coated 26mm prism.
The Antares EID90H hybrid correct image prism star diagonal provides convenient right angle viewing with refractors and cassegrains. The input barrel diameter is the Japan standard 0.965" and the receiver allows for use of 1.25" eyepieces and accessories. The prism housing is made of high grade ABS plastic and the 1.25" and 0.965" barrels are made from precision machined aluminum. Comes with one 1.25" dust plug. Weight: 4.3oz.
Important Notes: The length of the 0.965" aluminium nosepiece is 22mm (0.87"). Before purchasing, please make sure that the thumbscrew on your telescope is within this distance from the rear end of your focuser drawtube. Otherwise, the thumbscrew will not be able to engage and lock the diagonal. This is a known issue with some vintage telescopes in which the locking thumbscrew on the telescope is recessed by more than 0.87", and this diagonal will not work for you.
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.
New version with larger MgF2 coated 26mm prism.
The Antares EID90H hybrid correct image prism star diagonal provides convenient right angle viewing with refractors and cassegrains. The input barrel diameter is the Japan standard 0.965" and the receiver allows for use of 1.25" eyepieces and accessories. The prism housing is made of high grade ABS plastic and the 1.25" and 0.965" barrels are made from precision machined aluminum. Comes with one 1.25" dust plug. Weight: 4.3oz.
Important Notes: The length of the 0.965" aluminium nosepiece is 22mm (0.87"). Before purchasing, please make sure that the thumbscrew on your telescope is within this distance from the rear end of your focuser drawtube. Otherwise, the thumbscrew will not be able to engage and lock the diagonal. This is a known issue with some vintage telescopes in which the locking thumbscrew on the telescope is recessed by more than 0.87", and this diagonal will not work for you.
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.