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

25 is an unusual size with its 9

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

Last Alignment

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

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