Skywatcher Filter LPR Light Pollution ReductionThese contrast enhancing anodized aluminium, optical glass filters are designed to block out the wavelengths of light emitted by mercury vapour light and other common causes of light pollution, whilst providing higher transmission at critical hydrogen alpha and hydrogen beta lines than competing filters. Bright, light polluted skies appear much darker, and the contrast between object and sky is improved significantly. This contrast enhancement effect

Mass: 517 g (Total)

Specification and optics same as Startravel-102 AZ-3 but supplied without mount and tripod

25" filter threading used by eyepiece and accessory manufacturers)

The dovetail allows for easy attachment to and removal from most Schmidt-Cassegrain and EdgeHD optical tube assemblies without affecting the alignment of the finderscope

at a price that generates a renowned following amongst astronomers

Only about 30% storage space required compared to the Color data format

Hand control won't fall off when fork arm is angled towards the ground

not a red dot that can obscure your subject

the view through a SkyMaster Pro is second to none at this price point

The Sky-Watcher Skyliner 400P Flextube Dobsonian

You will never have to handle small locking screws again – instead

5m or less