Antares 0.965"/1.25" 90-deg Hybrid Prism Diagonal
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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.
Antares 0.965"/1.25" 90-deg Hybrid Prism Diagonal