Top Grain Focuser Reviews

FOCUSER Electric Wireless Dog Fence System, Pet Containment System for 2 Dogs and Pets with Waterproof and Rechargeable Collar Receiver for 2 Dog Container Boundary System (White)

  • 【⭐WIRELESS BOUNDARY 】 Creating a Dog Park and Keeping your Dogs Safely Contained in Your Yard By Simply Plugging In Transmitter and Pairing To Receiver(s) Without Digging and Burying Wires With Focuser Wireless Dog Fence System. Focuser receiver collar Supports most sizes of dog (10-110lbs, Neck: 8-21in)..
  • 【⭐Radius Up to 300m】Focuser Wireless Electric Containment System Will Create A Boundary With Adjustable Levels of 1-16. Radius 25-300 meters..
  • 【⭐Rechargeable and Waterproof Collar】 The Advanced Receiver Collar with High Capacity Built-In Durable Battery Which is Rechargeable. This Water-resistant Collar Receiver Is Rated IP67, Which Means Your Dog Can Get Wet in The Grass, Mess With The Sprinkler or Play in The Rain With this Electric Dog Fence System..
  • 【⭐ 4 Adjustable Correction Levels 】FOCUSER wireless dog fence is designed with 4 adjustable Level to Fit Various Sizes of Dog. You Can Simply Adjust the Levels According to Your Needs. No More Over-correction for small puppies and less-.
  • 【⭐ BUILT-IN SAFETY CHIP and Back up battery】The Built-In Safety Chip preventing the Over-Correction to Your Dog and the backup battery to prevent unexpected power outage during uses. FOCUSER wireless dog fence Provides You an Uninjurious Wa....
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SVBONY SV106 Guide Scope 60mm Multi-Use Finder Scope Guide Scope with Helical Focuser F4 for SG4 QHY5II ZWO SG4 CCD Astronomical Telescope

  • Versatile 60mm aperture Guide Scope with a built-in helical focuser for precise focusing of potential guide stars.
  • will help guide you to capturing higher quality astrophotos.
  • an ideal addition to any astrophotographers collection of gear.
  • The helical focuser simply moves the attached device inwards or outwards while maintaining its orientation.
  • this convenient feature means your field of potential guide stars will not rotate as focus is adjusted, further increasing ease of use.
  • For those nights when you don't plan to capture astrophotos exposures, this versatile Guide Scope can double as a straight-through finder scope with an optional 1.25" eyepiece installed.
  • For example, inserting a 25 mm eyepiece creates a 9.6x60 finder scope, or you can insert one Illuminated Centering Eyepieces for use as a finder with illuminated crosshairs for easy aiming.
  • The focuser boasts 8 mm of precise helical focus travel.
  • plus telescoping drawtube housing provides up to 35mm of additional back-travel if needed for your particular autoguider device.
  • a compression ring fitting keeps any inserted autoguider cameras or eyepieces free of pesky scratches.
  • The Multi-Use Guide Scope with Helical Focuser also features male T-threads on the focuser collar f....
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Celestron Motor for SCT and EdgeHD - Enables Electronic Focusing - Bring Celestial Objects into Sharp, Precise Focus, 94155-A

  • The Celestron focus motor for SCT and EdgeHD enables electronic focusing using a computer or Celestron Computerized mount hand controller for remote/hands-free observing.
  • Self-powering when connected to a Celestron Computerized mount the mount provides the power When connected directly to a computer USB provides the power.
  • Compatible with a wide variety of Celestron Schmidt-Cassegrain EdgeHD and Rowe-Ackermann Schmidt Astrograph optical tubes Check description for full list.
  • Motor controls include multiple speed rates automatic goto indexed Focuser position and Focuser backlash compensation.
  • Focuser Utility software for Windows provides a simple user interface Also compatible with Celestron PWI.
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Orion 60mm Multi-Use Guide Scope with Helical Focuser

  • Versatile 60mm aperture Guide Scope with a built-in helical focuser for precise focusing of potential guide stars.
  • Designed for use with the Orion StarShoot AutoGuider and StarShoot AutoGuider Pro (both sold separately).
  • Helical focuser collar will not rotate attached autoguider devices during focus adjustments.
  • Can also be used as a deluxe straight-through finder scope with optional 1.25" eyepieces installed (eyepieces sold separately).
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Orion 1.25-Inch Variable Universal Camera Adapter

  • Adjustable length adapter lets you attach a T-ring equipped DSLR or SLR camera directly to your telescope.
  • Useful for either prime-focus or eyepiece-projection astrophotography with refractors or reflector telescopes.
  • Slides into 1.25" telescope focuser or 2" focuser with step-down adapter.
  • has T-threads for attachment of camera body.
  • Allows you to vary the magnification without changing the inserted eyepiece when performing eyepiece projection astrophotography.
  • Requires T-ring to fit your brand of camera (T-rings sold separately).
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FOCUSER Electric Wireless Dog Fence System, Pet Containment System for Dogs and Pets with Waterproof and Rechargeable Training Collar Receiver Boundary (White)

  • WIRELESS BOUNDARY Creating a Dog Park and Keeping your Dogs Safely Contained in Your Yard By Simply Plugging In Transmitter and Pairing To Receiver(s) Without Digging and Burying Wires With Focuser Wireless Dog Fence System. Focuser receiver collar Supports most sizes of dog (10-110lbs, Neck: 8-21in)..
  • Waterproof Focuser Water resistant Collar Receiver Is Rated IP67, Which Means Your Dog Can Get Wet in The Grass, Mess With The Sprinkler or Play in The Rain With this electric dog fence system..
  • Radius Up to 500mFocuser Wireless Electric Containment System Will Create A Boundary With Adjustable Levels of 10-100. Radius 25-500 meter..
  • Rechargeable Collar The Advanced Receiver Collar with High Capacity Built-In Durable Battery Which is Rechargeable. Also, the Collar Has Designed to Has The Function of Low Power Consumption and Low Battery Alert..
  • BUILT-IN SAFETY CHIPThe advanced 433hz Frequency Technology Consistently Provides a More Stable and Accurate Signal Transmission. The Built-In Safety Chip preventing the Over-Correction to Your Dog and Providing You an Uninjurious Way to have Your Dog Stay Within the Yard..
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Sky-Watcher Quattro 300P Imaging Newtonian - Large Aperture 12-inch Reflector Optical Tube for Astrophotography

  • FAST f/4 OPTICS: With a bright f/4 focal ratio, the Quattro Imaging Newtonian captures greater detail in a shorter exposure time.
  • 2-INCH DUAL-SPEED CRAYFORD-STYLE FOCUSER: Never miss focus with this 2-inch dual- speed crayford style focuser.
  • OVERSIZED SECONDARY MIRROR: All Quattro Newtonians use an oversized secondary mirror capable of illuminating both APS-C and full-frame DSLRs without vignetting.
  • KNIFE-EDGE BAFFLES: Multiple knife-edge baffles minimize stray light from entering the optical tube and ruining your imaging or viewing experience.
  • EVERYTHING YOU NEED: While most manufacturers make you pay extra, Sky-Watcher gives you everything you need right out of the box, including: tube rings, a Vixen-style dovetail, and an 8x50 straight-through finderscope and bracket.
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Astromania Off-Axis Guider with Micro-Focusing - for Successful Astronomy Photos Without A Guide Scope

  • An off-axis guider is a brilliant invention. This device sits in the 2-inch focuser in front of the camera. A small prism directs a little light from the telescope into a separate tube - where your guide camera or crosshair eyepiece is attached. This makes it possible to instantly correcting any tracking errors during the extended period over which your camera is exposing the image - for perfectly round stars!.
  • The advantages: 1) lets you take beautiful astronomy photos with round stars. 2) for refractors, SCs, MAKs and RC telescopes. 3) off-axis guider only 24mm in overall length - very compact. 4) robust yet light. 5) 45mm optical transmission - full illumination, even with large chips. 6) micro-focusing - especially smooth helical focusing with 0.05mm accuracy. 7) 75mm of back focus..
  • The connections: Easy to adapt - the Astromania off-axis guider has an M48 thread on the telescope side and an additional socket for 2 inch eyepieces. The accessory has three screws and a flat M48 adapter for connecting your camera. The advantage - you can rotate your camera at any time and find the optimum orientation for the astronomical object you are exposing..
  • Exact micro-focusing with 10mm travel - for auto-guider or crosshair eyepiece: A small prism directs ....
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SVBONY SV503 Telescope 102ED F7 Extra Low Dispersion Achromatic Refractor OTA Micro-Reduction Rap Focuser for Astrophotography

  • 102mm objective lens diameter and f/7 focal ratio telescope OTA.
  • large objective lens brings more lights into the scope body and you will get more bright and clear image.
  • Doublet air spaced achromatic S-FPL51 ED glass provides you less chromatic aberration image.
  • ultra wide band multi-layer coating technology.
  • 102mm aperture optics and retactable lens hood deliver bright wide-field images with sharp resolution.
  • it comes with dual focus rack and pinion focuser with focus knob cover.
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SVBONY SV171 Telescope Eyepiece Zoom Eyepiece 1.25 inch 8mm to 24mm Zoom FMC 7 Element 4 Group for Telescope

  • SV171 Super-wide Angle 1.25" 8mm-24mm zoom eyepiece.
  • SV171 zoom eyepiece allows you to change magnification power without swapping out eyepieces.
  • Fully multi-coated glasses for excellent image contrast and light transmission.
  • Sharp optimal performance with low chromatic....
  • Exceptionally long 18mm-19.5mm eye relief range allows eyeglass wearers to enjoy the entire field of view without....
  • Sleek black barrel with safety undercut to reduce the possibility of the eyepiece slipping out of the focuser or diagonal.
  • Standard 1.25" fitting diameter compatible with any astronomical telescope with 1.25" focuser.
  • The bottom M28.5 x 0.6 thread can also be used with....
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Astromania 60mm Compact Deluxe Finder & Guidescope Kit with 1.25' Double Helical Focuser - Guiding with The Mini-Guide Scope: So Astrophotography is Easier and Less Equipment

  • Mini-guide tube to quickly find objects and guiding stars, designed both for visual, as well as for photographic use.Take any 1.25 inch eyepieces in your collection, worm-focuser: fast focusing. Prevents rotation of the camera and eyepiece. Or use it as a comfortable, large viewfinder to waste less time finding objects in visual observation..
  • 240mm focal length. Compact mini guide scope designed for use with astrophotography telescopes up to 1500mm focal length. With bright, wide-field optics puts numerous potential guide stars in view so you'll never have to search for one! There is an extension tube locking thumbscrew to hold the extension tube in place, and the other two holes are equipped with built-in hexagonal screws, which you can also tighten the two hexagonal screws with an hex wrench to lock the extension tube if necessary..
  • Adjustable-aim dovany weight to an astrophotography setup and can conveniently be stashed in an accessory case between uses. "Dovetail guide scope bracket installs on virtually any astrophotography telescope quickly and easily..
  • The sturdy metal housing made ​​of black anodized aluminum. Looking out not only solid, but is also very robust. A milled and knurled ring allows easy and precise fine focus adjustments. It com....
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SVBONY SV503 Telescope 80ED F7 Telescope OTA Focal Length 560mm for Exceptional Viewing and Astrophotography

  • SV503 Telescope OTA is designed with ED glass.
  • SV503 80ED telescope produces an especially colour true and high contrast image.
  • just right for more discerning observers.
  • The gear ratio of the dual speed 2-inch toothed focuser is 1: 10.
  • which makes it easy to achieve accurate focus.
  • The appearance of the SV503 OTA is baked with high-end fine-grained paint.
  • with exquisite appearance and delicate feel.
  • The whole optical lens adopts the technology of ultra-wideband multilayer coating.
  • fully multi-coated ED optics deliver outstanding views.
  • 80mm F7 astronomy telescope SV503 would be better begin for astronomy amateurs to do astrophotography.
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FOCUSER Electric Wireless Dog Fence System Pet Containment System for Dogs and Pets with Waterproof and Rechargeable Collar Receiver for one Dog Container Boundary System White

  • 【⭐WIRELESS BOUNDARY 】 Creating a Dog Park and Keeping your Dogs Safely Contained in Your Yard By Simply Plugging In Transmitter and Pairing To....
  • 【⭐Radius Up to 300m】Focuser Wireless Electric Containment System Will Create A Boundary With Adjustable Levels of 1-16. Radius 25-300 meters..
  • 【⭐Rechargeable and Waterproof Collar】 The Advanced Receiver Collar with High Capacity Built-In Durable Battery Which is Rechargeable. This....
  • 【⭐ 4 Adjustable Correction Levels 】FOCUSER wireless dog fence is designed with 4 adjustable Level to Fit Various Sizes of Dog. You Can Simply....
  • 【⭐ BUILT-IN SAFETY CHIP and Back up battery】The Built-In Safety Chip preventing the Over-Correction to Your Dog and the backup battery to....
Check Stock