TEC ADL 300 f/5.6 AstrographDetail of the 300 ADL primary mirror cell and cooling fan system
ADL stands for Astrograph Diffraction Limited, it is a 5-element optical system with two mirrors and 3-lens field corrector. It is most compact, elegant and the lightest astrograph of given size on a market.
Mirrors substrate Quartz or zero-expansion Sital Mirrors coatings Enhanced Aluminum, 95-96% average reflectivity Aperture 300 mm Focal length 1.680 Focal ratio 5.6 Image Scale 2 arcmin / mm Field diameter 52mm (36 x 36 mm chip) Focuser type helical Focuser travel 10mm OTA material OTA made of Aluminum alloys and Titanium tubes. It is thermocompensated. Primary cooling 4 Papst (Germany) low vibration fans TOA weight 36lb (16kg) OTA length 29" (735mm) Optional accessories Kendrick Astro-system dew controller with secondary mirror heating, FLI ATLAS focuser, adapters, TEC 9" dovetail.
Spotdiagram ADL 300 f/5.6 Astrograph
|Optical Design||Astrograph Diffraction Limited|
|Clear Aperture||300 mm|
|Focal Length||1680 mm|
|Image Scale||2 arcmin / mm|
|Optical length (mm)||29" (735 mm)|
|Optical Tube Weight||36lb (16 kg)|