ZWO ASI290MM-Mini monochrome astronomy camera for autoguiding during astrophotography or for monochrome imaging of planets, the Moon, and Sun (with safe solar filter, not included) | 2.1 megapixel CMOS sensor with small 2.9-micron pixels, 1936x1096 resolution, and high QE and low noise enable detection of fainter guide stars | Fast USB2.0 data transfer at up to 20.4 frames per second at maximum resolution | Compact, lightweight, and attractive red anodized CNC aluminum body stands up to heavy field use and slides directly into 1.25” focuser of telescope or guide scope | Camera electronics draw power from your computer’s USB2.0 interface with Type C USB connector; All software and drivers are available from the manufacturer’s website; compatible with Mac OS X and Windows (32-bit and 64-bit) XP and later

Portable, easy-to-use smart telescope that lets anyone capture & share amazing pictures of space | Take incredible images of nebulae, galaxies, the Moon, and the Sun (with included solar filter) and share them instantly to social media | No previous astronomy experience required, perfect for all ages, even kids (recommended age: 8 & older) | Use the free companion app to wirelessly control the telescope, find tonight's best objects, edit images, and share to social media | Includes 250mm apochromatic telescope, full HD camera, automatic GoTo tracking mount, tripod, built-in battery, and carry case; total weight 6 lbs (2.7 kg)

How to install the filter? 1.25? filters required to be: threaded shorter than 3mm in length, without threads less than 7mm in height 1?Take the back cover off 2?Lay the wheel down flat 3?Screw-in the filters up 4?Put the back cover on | 31mm and 36mm filter requires: a set of M2 screws and washers needed to fix the filters are included in the package . 1?Take the back cover off. Lay the wheel down flat 2?Hold the filter by the very edges and lay them in to the recess for each position 3?Attach the washers,put in the screws 4?Put the back cover on | How to use it? you just need to plugin the EFW with USB2.0 cable and install the ASCOM driver There are ZWO Filter Wheel(1) and ZWO Filter Wheel(2) to select, you can use either one of them There are 2 ASCOM is for controling 2 EFW in one software.