Under $500

Get the National Geographic Carbon Trekking Poles Set for FREE, when purchasing 10x42 Waterproof Performance Roof Binoculars. To activate this pro...

It's estimated that we will colonize Mars by 2050. The challenges to make it happen are daunting.  Dr. Barth touches on some of the problems tha...

Features 4K HD Camera Waterproof Case Flat Adhesive Mounts Handle Bar/Pole Mount Frame Housing Mount Straps Long Thumb Screw Quick Release Buckle...

Description Around the World or Around the Block - Bresser Everest Binoculars are the Perfect Companion! Offering an ideal combination of superior...

Dr. Daniel Barth returns with the 33rd episode of 'How Do You KNOW?' to discuss the Three Ring Theory that explains the formation of our solar s...

Features Combination of fully multi-coated lenses and superior Bak-4 prisms creates images with excellent contrast and clarity 42mm aperture has ...

Features Combination of fully multi-coated lenses and superior Bak-4 prisms generate images rich in contrast Combination of fully multi-coated le...

Features Compact size keeps the binocular lightweight for grab-and-go adventures and extended observing 8x magnification provides excellent detai...

Features 8x Magnification ED Glass Waterproof Fogproof and Nitrogen Purged 372ft field of view at 1000 yards Case, strap, lens covers and cleanin...

Features 10x Magnification ED Glass Waterproof Fogproof and Nitrogen Purged 319ft field of view at 1000 yards Case, strap, lens covers and cleani...

Features 8x Magnification ED Glass Waterproof Fogproof and Nitrogen Purged 335ft field of view at 1000 yards Case, strap, lens covers and cleanin...

Dr. Daniel Barth gives us an overview of and will answer your questions about the James Webb Space Telescope in this 34th Episode of How Do You ...

Features 4K HD Camera Waterproof Case Tripod Floating Handle Flat Adhesive Mounts Handle Bar/Pole Mount Frame Housing Mount Straps Long Thumb Scr...

Dr. Daniel Barth gives us an overview of and will answer your questions about Lagrange Points in this 35th Episode of How Do You KNOW? https://e...

Dr. Daniel Barth gives us an overview of and will answer your questions about what happens When Asteroids Strike in this 36th Episode of How Do ...

What happens when the sun releases energy to create prominences, flares, mass ejections, and tsunamis, and how can those events affect us on ...

Description Using this accessory plate, you can use telescope and camera side by side By sliding this accessory plate into your standard Vixen Do...

Description Finder Bracket to facilitate Optical axis adjustment Short bracket for Vixen Finder Scope. Use with item #2654, finder bracket shoe, ...

Description Converts 60mm thread to 53mm thread Available for FL and ED OTAs. Specs Optical Path Length 4mm Weight 22g Warranty Vix...

Description Converts 53mm thread to 43mm thread Available for FL and ED OTAs. Specs Optical Path Length 3mm Weight 19g Warranty Vix...

Description For Photography of Extended Nebula and Cluster Reduces focal length, increasing the field of view and decreasing the exposure time to ...

Description For stable astrophotography Stable astrophotography can be available. Vixen's Weight Shaft Camera Bracket allows for the attachment ...

Features Travel camera mount for star photography Very compact and light, optimized for air travel Different tracking speeds Designed for time-la...

Description For smooth setting up of POLARIE and AP equatorial mount The polar meter is a "unlikely" design that summarizes level, compass and in...

Description A wider field of view is more comfortable. Star images around the edge of the field of view have been improved and visibility has bee...

Description A wider field of view is more comfortable. Star images around the edge of the field of view have been improved and visibility has bee...

Description A low-profile mount for installing a guide scope Guide Mount XY is designed for use in astrophotography and makes finding a guide st...

Features Possible to store different size eyepiece You can use the partition and lid as storage space The grey reflective tape stitches along the...

Description It allows you to use an polar alignment scope PF-LII, polar alignment scope PF-L or SX polar axis scope for the POLARIE U. The polar s...

Description For accurate polar alignment of the POLARIE U This is a kit of polar alignment scope PF-LII and polar scope arm bracket. It allows for...

Features Very high sharpness and contrast across the entire field of view Almost no color defects due to lanthanum glass Twist-Up eyecup for peop...

Features Very high sharpness and contrast across the entire field of view Almost no color defects due to lanthanum glass Twist-Up eyecup for peop...

On this episode of How Do You KNOW? Dr Daniel Barth will be discussing what all is involved in the Fine Tuning of Nature.  Because we tend to suspe...

Features 3x Magnification Carry Case Included Lanyard Description Be ready whenever adventure calls with the lightweight National Geographi...

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 ...

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

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 ...