ZWO FF107 APO: Quadruplet APO Telescope USB3 Astronomy Camera When the gain is 80

When the gain is 80

4 (12nm filters) and f/2 (6nm filters)

allowing it to pass through nearly unhindered

29in/49cm(no stretch)

or faint deep-sky objects

ZWO FF107 APO: Quadruplet APO Telescope USB3 Astronomy Camera When the gain is 80ZWO FF107 APO Astronomical Telescope and a FREE Reducer ZWO FF107 APO Main Features: Quadruplet Air Spaced APO Design No need to calculate back focus Small and Round Stars with a central RMS radius of 3m Various Adapters (M48, M54, M68, and M86) Dual Speed (1: 10) Focuser Self flattening design Supports both fine and coarse adjustment No need for a separate field flattener The ZWO FF107 APO is a refractive astrograph with a powerful flatfield optical