Under $500

Features Precision all-metal construction with stainless-steel ball bearing for super-smooth action. Attractive silver and black bead-blast finis...

Features Variable polarizing filter Individually adjustable image brightness Made from highly parallel optical glass Black anodized aluminum hous...

Description   This model does not come with the adapters that allow for a direct screw-on connection to a camera. It can be used with a camera by ...

Description Dual plug (DB9 FTDI chipset and USB 2.0 Mini B) works with PMC-Eight OPENGoTo systems, allowing ASCOM communications between a compute...

Features Wireless rain gauge with digital display 9-day precipitation history and rain alarm Time (12 / 24h) Date with language selection for the...

Features Dark-Sky filter Contrast increase in aurora & deep-sky photography Reduction of stray light from street lights, for example Wide-ang...

Features High quality Explore Scientific O-III filter Let only the oxygen emission lines "through" Absorbs all other emission lines Absorbs almo...

Features High quality Explore Scientific S-II filter Absorbs all other emission lines Absorbs almost all of the artificial light Passband bandwid...

Features High quality Explore Scientific S-II filter Absorbs all other emission lines Absorbs almost all of the artificial light Passband bandwid...

Features High quality Explore Scientific H-Alpha filter Lets only the emission lines of hydrogen "through" Absorbs almost all of the artificial l...

Features High quality Explore Scientific H-Alpha filter Lets only the emission lines of hydrogen "through" Absorbs almost all of the artificial l...

Features High quality Explore Scientific O-III filter Let only the oxygen emission lines "through" Absorbs all other emission lines Absorbs almo...

Features High quality Explore Scientific S-II filter Absorbs all other emission lines Absorbs almost all of the artificial light Passband bandwid...

Features High quality Explore Scientific S-II filter Absorbs all other emission lines Absorbs almost all of the artificial light Passband bandwid...

Features High quality Explore Scientific H-Alpha filter Lets only the emission lines of hydrogen "through" Absorbs almost all of the artificial l...

Features High quality Explore Scientific H-Alpha filter Lets only the emission lines of hydrogen "through" Absorbs almost all of the artificial l...

Features Tuya® IoT ready that works with Tuya® Smart & Smart Life Apps via Wi-Fi Able to trigger other Tuya® compatible IoT devices Multi-cha...

Features Sleek profile with top-class metallic charcoal grey finish Slim design with 4 standing angles, ideal for Desktop, bedside or wall Splend...

Features German silent movement and components, high sensitivity and precision Radio-controlled time via WWVB in the United States, Canada and Me...

Features Automatic time setting (CET) via radio signal Manually Time offset adjustable for other time zones Symbolic weather forecast for the nex...

AA Battery Holder Powers Truss-Tube Dobsonian Fans   The AA battery holders for the Explore Scientific truss-tube Dobsonian telescopes with fans us...

Features This is a field flattener for refractor-type telescopes with a focal ratio of f/5 to f/7 Causes no change to the telescope focal length ...

Description Attaching a DSLR camera or other instruments to the AP mount The dovetail slide bar PG is used to attach a DSLR camera or other instr...

Galileoscope Refractor Telescope STEM Kit - Click Here Features Lightweight Includes a sun shade Stronger than any other solar filter film on the...