William Optics Gran Turismo 81 IV Triplet APO (A-F81GTIV) Colour You can add extra spacers(optional)

You can add extra spacers(optional) to reach the required back focus

The HEM44EC features a high precision RA axis encoder that delivers incredible tracking accuracy

8x Focal Reducer/Flattener for TeleVue 85/Pronto is an accessory lens which converts TV-85 to 480 mm f/5

The fully realized cable management system eliminates cable drag and makes remote setups ridiculously convenient

Dew is moisture that condenses from the air onto the outside of the chamber window

William Optics Gran Turismo 81 IV Triplet APO (A-F81GTIV) Colour You can add extra spacers(optional)The William Optics Gran Turismo 81 Imaging APO Telescope is a high quality Apochromatic Imaging optical telescope with an aperture of 81 mm and a focal length of 478 mm or an f ratio of f 5. 9, without the optional Reducer Flattener. If you wish to take great astro images with a high quality APO refractor, this William Optics Gran Turismo 81 Imaging APO telescope is a good way to obtain your goal. Its FPL 53 glass APO design provides images with