ZWO 21mm M42 to M42 Extender (ZWO-T2-EXT-21) stockyIgnore and the focal length can

and the focal length can be shortened to 414mm

5mm Cooling Regulated Two-Stage TEC Delta T 35°C-35°C below ambient Camera Power consumption 650mA at 5V Cooler Power consumption 12V at 3A Max Working Temperature -5°C — 45°C Storage Temperature -20°C — 60°C Working Relative Humidity 20% — 80% Storage Relative Humidity 20% — 95%

6) filters

81 Limiting Stellar Magnitude: Ideal: 10

The fully waterproof housing for use in all weather conditions provides peace of mind when unexpected weather rolls in

ZWO 21mm M42 to M42 Extender (ZWO-T2-EXT-21) stockyIgnore and the focal length canThe extender is designed to help you to reach 55mm or any other back focus distance.