Under $200

Description Connects Telescope, Spotting Scope with DSLR Camera The T Ring is designed to be used for Astrophotography in conjunction with other ...

Description Connects Telescope, Spotting Scope with DSLR Camera The T Ring is designed to be used for Astrophotography in conjunction with other ...

Description Block stray light for the astrophotographer Water-resistant rubber heater. Reduces dew on objective lens and primary mirror. Specs ...

Features High-quality NPL eyepiece with 50° field of vision Good contrast and reduced color aberrations Eyepoint distance: 3.0 mm Connection: 31....

Features High-quality NPL eyepiece with 50° field of vision Good contrast and reduced color aberrations Eyepoint distance: 3.0 mm Connection: 31....

Features High-quality NPL eyepiece with 50° field of vision Good contrast and reduced color aberrations Eye relief: 11 mm Connection: 31.7 mm, 1 ...

Features High-quality NPL eyepiece with 50° field of vision Good contrast and reduced color aberrations Eye relief: 2.3 mm Connection: 31.7 mm, 1...

Features High-quality NPL eyepiece with 50° field of vision Good contrast and reduced color aberrations Eye relief: 24 mm Connection: 31.7 mm, 1 ...

Features High-quality NPL eyepiece with 50° field of vision Good contrast and reduced color aberrations Eye relief: 15 mm Connection: 31.7 mm, 1 ...

Features High-quality NPL eyepiece with 50° field of vision Good contrast and reduced color aberrations Eye relief: 4.5 mm Connection: 31.7 mm, 1...

Features High-quality NPL eyepiece with 50° field of vision Good contrast and reduced color aberrations Eye relief: 6.5 mm Connection: 31.7 mm, 1...

Essential for Time-Lapse Photography Specs Connecting to the POLARIE U 2.5mm stereo mini plug Connecting to the camera Accessory remote t...

Essential for Time-Lapse Photography Specs Connecting to the POLARIE U 2.5mm stereo mini plug Connecting to the camera Multi-connector pl...

Description Camera Adapter for Telescope Eye Projection Photography Attachable to flip mirror or R200SS focuser. ※Not usable with LVW series eye...

Features A long eye-relief of 15mm prevents you from eye fatigue for long observation. The incorporated roof prisms allow the Multi monocular for...

Features Reveals Details of Artwork and Crafts Fully Coated Optics Ribbed Rubber Focus Collar Fold-Down Rubber Eyecup BK7 Roof Prism Exceptionall...

Features Reveals Details of Artwork and Crafts Fully Coated Optics Ribbed Rubber Focus Collar Fold-Down Rubber Eyecup BK7 Roof Prism Exceptionall...

In order to unlock the mysteries of the corona, but also to protect a society that is increasingly dependent on technology from the threats of s...

Today, astronomers and researchers, both professional and amateur, have unprecedented access to online science data, allowing a greater unders...

The first positive detection of water ice on Mars was from the Phoenix Lander that scraped away some surface dust to reveal pristine ice belo...

Humans have been obsessed with the measurement of time perhaps as far back as 100,000 years ago. Dr. Barth guides us through evidence of meas...

Stromatolite fossils are a dominant record of life for most of Earth’s history prior to the appearance of complex, multicellular organisms. S...

  Schedule Updated 9/21/2022 We are excited to announce the second Ariz...

In 2019, NASA announced that an international team had found sugars essential to life in meteorites. The discovery added to the growing list o...

Aside from Earth, Mars is the most studied ecosystem by scientists today. With the process of collecting data from rovers and orbiting satelli...

Signed by the Author for Delivery at the Arizona Dark Sky Star Party The autobiography of Mike Weasner describes his journey through the Universe t...

This is part one of a two-part program on the Hubble Constant and the controversy about different values for this keystone unit of measurement. In...

This is part two of a two-part program on the Hubble Constant and the controversy about different values for this keystone unit of measurement. In...

Planetary nebulae are some of the most beautiful and intriguing deep sky objects in the Milky Way. They reveal the expanding, glowing shells of th...

Features Reflection / Transmission LED Illumination 3 Lenses: 4X / 10X / 40X Dust cover Included: Permanent slides, Slides, Microscopy instrument...

From its discovery in 1846 until Clyde Tombaugh's discovery of Pluto in 1930, Neptune was the farthest-known planet. Now with the controversial re...

Features 4K Wifi Waterproof Action Camera Waterproof Case Rechargeable Battery USB Cable Remote Handlebar/Pole Mount Frame Mount Straps Release B...

Gravity is the weakest of the four fundamental forces, it causes causes mutual attraction between all things with mass or energy. It is  approximat...

 The European Space Agency’s Exobiology on Mars (ExoMars) program has included a series of missions designed to study the potential for...

In cosmology, the anthropic principle involves any structure of the universe, the values of the constants of nature, or the laws of nature that ha...

Have you ever wondered how hard it can be to merge two black holes? Well it actually is a lot harder than you think. You would think that because t...