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True diamonds form a micro-geared high precision drive system never accomplished before. In comparison to conventional crayford or rack & pinion drives, this micro-geared movement has zero backlash, zero cogging, and zero flexure

The new Sky-Watcher EXPLORER-150PDS Newtonian Reflector incorporates the same superb mirror-set as the Explorer-150P Black Diamond Series, but with two significant advantages.

Travel case for NexStar SE 4/5
Measurements: 52 x 30 x 25cm
Empty weight: 3 kg
Made in Germany

The Antlia H-alpha EDGE narrowband filter optimizes the FWHM (full width half maximum) to 4.5nm bandpass. The suppression of optical density (OD 5) on unwanted wavelengths and the excellent transmittance characteristics found in the Antlia 3nm Pro.

Antlia OIII 4.5nm EDGE filters are designed to deliver 85% transmission at the 500.7nm line that provides you with the maximum signal to reveal the faintest OIII nebulae structures.

High transmittance for working with both long focal ratios and fast optical systems (as fast as f/3 or maybe even f/2.8)!

This H-alpha Filter is suitable for imaging of Hydrogen nebulas from observation sites with light pollution and from dark sites as well. The contrast between an object glowing at 656nm and the background is massively increased.

Celestron SkyMaster Pro ED binoculars are the ideal choice for amateur astronomers or anyone who observes at great distances. The SkyMaster Pro ED uses superior optics, coatings, internal parts, and housing materials.

Motor module for AP mount. Enables motorized adjustments of DC axis. Ideal for astrophotography.

The new Acuter DS-PRO series advanced achromatic waterproof spotting scopes are exceptionally stylish and highly functional precision optical instruments.
They combine excellent optical performance with many desirable high-end features

Fits D Series Saddles. Side-By-Side dovetail plate. Incorporates two saddle plates mounted parallel to each other.

The Antlia H-Alpha (Ha) 3.0nm filter is suitable for imaging H-Alpha emissions from nebulae, planetary nebulae and supernova remnants.

True diamonds form a micro-geared high precision drive system never accomplished before. In comparison to conventional crayford or rack & pinion drives, this micro-geared movement has zero backlash, zero cogging, and zero flexure

Off to the stars - the entry-level telescope with lots of accessories, versatile MPM mount with fine adjustment in both axes, solar filter & smartphone adapter

Bring out the best in your nebulae astroimages with the H-alpha H-beta OIII (Hα-Hβ-OIII) Imaging Filter for the 8” RASA.

The Celestron Hummingbird is a “micro” ED spotting scope, and like its namesake, the Hummingbird Micro Spotting Scope is as well suited to long-distance travel as it is to the backyard.