Optolong L-eXtreme Dual Band 2 Inch Nebula FilterOptolong L eXtreme Dual Band 2 Inch Nebula Filter Features 2" low profile filter cell suitable for filter drawers, filter wheels with 2" filter thread The filter has a very narrow bandwidth of only 7 nm for O III and H Alpha and provides a very high contrast The areas of light pollution are completely blocked, so successful deep sky photography is also possible from close to the city The filter is suitable for mono and color cameras H Alpha regions,

69 arc seconds

The OTA is tastefully finished in Sky-Watcher’s proprietary Black Diamond flecked metallic paintwork and features

A “Speed Rate Regulator” knob is located just under the power indicator and can be turned in either direction to slow down or speed up the motor

in dual 2" or 1

Fine-optically polished to ensure accurate 1/4 wavefront over both surfaces

Internal material : PP Webbing

000 object database with 200 user-definable objects and expanded information on over 200 objects

The Celestron NexStar+ EQ Hand Control is the standard computer accessory on all current equatorially mounted Celestron go-to telescopes: Advanced VX

Interface Box

The black anodized housing with orange highlights matches the eyepieces in the Celestron X-Cel LX line

Spreader plate: Increase the stability of the tripod

Two Silicone Straps