iOptron GPS Module for CEM26/GEM28/CEM40/GEM45 This 32-channel external GPS module is for CEM26/GEM28 mount. It is also a replacement module for CEM40/GEM45 mount. It consists of a GPS module and a 6P6C connection cable (straight wired).
Coronado 1.25" Hot Mirror , 1.25" diagonal with red glas filter. The diagonal hot mirror is likely a dichroic mirror that acts just like a long-pass filter, reflecting a percentage of the Ha and transmitting/absorbing shorter wavelengths. it was delivered with Coronados BF 30 straight block filter
Baader Glasspathcorrector for binoviewers The corrector is more than just a simple barlow lens that compensates for part of the optical path of the binoviewer. First of all, the corrector corrects the color fringes created by the prisms of the binoviewer. Contrast and sharpness of the image increase. Calculation of the shortening factor: The corrector is installed directly in front of the binoviewer. If the corrector is moved further away from the binoviewer, the magnification effect and path compensation increase. ♦ GWK 1,25x: The optical path of the binoviewer is shortened by 18 mm. ♦ GWK 1,7x: The optical path of the binoviewer is shortened by 41 mm. ♦ GWK 2,6x: The optical path of the binoviewer is shortened by 84 mm. Adaptation to the telescope: Adaptation to the binoviewer is simple. The corrector is simply clamped between the T2 female thread and the T2 male thread. The adapter is automatically centered. For the connection to 1.25" or 2" we recommend suitable Baader adapters which are linked under the accessory recommendations. Further application possibilities: The correctors are not only suitable for the Baader Maxbright binoviewers. Also for other binoviewers or adapters, prisms ... the correctors can be used. Whenever you cannot reach the point of focus with a new accessory, the Baader Glass Path Corrector can be the saving solution.
Glas FK61 (similar to Ohara FPL51), has blackenededges, a measured transmission von over 99% from 400 nm to 700 nm, optimized for F/4 Newtonian-Telescopes. The barlow has a negative focal length of - 62.9 mm and a working backfocuse of 105 mm from center last lens to focuse ( eyepiece field stop). You will need now a 1.25" eyepiece holer 104 mm long