Skywatcher Filter UHC Ultra High ContrastThe narrowband UHC filter, like the O III filter, isolates the two doubly ionized oxygen lines (496 and 501nm) in addition to the hydrogen beta line (486nm) emitted by planetary and most emission nebulae. This filter permits superb views of objects like the Orion, Lagoon, Swan and other extended nebulae. It performs well in smaller aperture instruments owing to its greater light transmission than the O III, yet still suppresses light pollution well.

AZ-701 - 1

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"Also excels for double-star observatons"  Skymax-90

Aligns in 3 minutes or less

Magnification of Eyepiece 1: 102 x

nature photographer

every component of the system has been taken into careful consideration to work together seamlessly

and the contrast between object and sky is improved significantly

Focal Length: 2350 mm (93")

5 in (343 mm)

OPTICAL TUBE LENGTH: 16in

ie/Celestron-T-Adaptor-Nexstar-4SE-C90-Telescopes