William Optics Adjustable Flattener Reducer Flat61R for ZenithStar 61 which allows you to easily

which allows you to easily change to a new filter after each set of exposures by simply rotating the filter wheel

history and in depth behind-the-scenes glimpses at the people

5 Type Mount Type of build Equatorial

it also allows to distinguish some structures in Venus' atmosphere

850–1250 Accessory tray

William Optics Adjustable Flattener Reducer Flat61R for ZenithStar 61 which allows you to easilyDescription The flattener is a lens that evens out the field, as this is slightly curved by the primary optics. This curvature causes stars that are imaged at the edge of the field of view to be less sharp. The flattener, also called a field flattener, corrects this effect. Astrophotographers can then enjoy images where the stars remain sharp right out to the edge of the exposure. The flattener is installed between the telescope and the camera. This