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Use this female T-thread to male T-thread spacer to extend standard T-thread adapters to achieve the correct backfocus for your telescope. Availabl...

This is the top half of the Celestron CPC-1100 counterweight set. Use this if you already have a bottom slidebar kit from Celestron or Losmandy. In...

Machined aluminum bracket and shaft coupler to attach a ZWO EAF motor to a 2.5" or 3.0" Feathertouch Focuser.  Also fits Feathertouch retrofit kits...

High-strength carbon fiber tripod for Wave mounts  29-inch (747mm) maximum extended length  19.7-inch (500mm) minimum retracted length  44-pound (...

  Experience our best optical performance with EdgeHD’s aplanatic, flat field Schmidt-Cassegrain optics for pinpoint stars all the way to the edge...

The ASI2400MC Pro is the first CMOS Astro Camera that adopts Sony IMX410 Sensor. Some of the highlights include: Sony IMX410 full-frame format sen...

This version of the C14 MicroFocuser will fit both the Edge HD and new-style non-HD 14" SCTs from Celestron. The "new-style" non-HD C14s have the s...

The thickness is 7mm so you can use C or CS lens with ASI cameras depending on the required backfocus. The backfocus of a C lens is 17.5 mm and of ...

The thickness of the M42M-M48F 22.5mm extender is 22.5mm. It is an important astronomical accessory for ASI2600MM Pro users who want to connect the...

Published annually by the Royal Astronomical Society of Canada, Observer's Handbook 2024 is the essential reference for professional astronomers, a...

For over 50 years, Fisher Space Pen has been proud to have our technology approved and used on every crewed flight into space since 1967 with NASA....

Conceived in a dream in July 1948, Paul Fisher was soon machining a new pen design shaped from solid aluminum. It became the first Fisher ball poin...

Conceived in a dream in July 1948, Paul Fisher was soon machining a new pen design shaped from solid aluminum. It became the first Fisher ball poin...

To achieve true dynamic balance with a fork-mounted SCT, both top and bottom weights are required. See stock number CWCPC8-CS for the complete top ...

A new generation - the world-first - galaxy and nebula booster filter intended for shooting not only nebulae, but also galaxies by the use of the t...

M42 Sensor tilt adapter Product: M42 sensor tilt adapter Thickness: 5mm Suitable for APS-C cameras (ASI2600) You can connect it to M68 OAG and 2”E...

  ED Objective Lens: Minimizes chromatic aberration, accurate color reproduction, increased resolution and contrast XLT Coatings (Fully Multi-Co...

Easy to understand facts abut Insects, an Arachnid and a Crustacean Full-Color photographs of each Bug Thick and Durable Flash Cards that Child...

Month-by-month information on meteor showers and how to make the most of watching them Advice on starting and building a meteorite collection plus...

What do you see when you look up into the sky at night? The moon, stars, maybe even a comet or asteroid? You can also see other planets! In Planet...

Take a look through the lens and discover the beauty and science of the magnificent world that is our night sky – and beyond.From the 150km- (93 mi...

Note that this version of the counterweight set will not work with the CPC-800 telescopeTo achieve true dynamic balance with a fork-mounted SCT, bo...