OSI

580 products

580 products
Hard plastic filter case for 2" or 1.25" filters, set of 5
Hard plastic filter case, set of 5, view 2 of 2
Hard Plastic Filter Case for 2" or 1.25" filters, Set of 5
Lumicon laser pointer bracket for refractor telescope, primary product view
Lumicon laser pointer bracket for refractor showing mounting clamp detail
Lumicon Laser Pointer Bracket - Refractor
Farpoint Vixen-to-Losmandy dovetail saddle with spacer pucks, view 1 of 2
Farpoint Vixen-to-Losmandy dovetail saddle with spacer pucks, head-on view
Farpoint V-to-D Dovetail Adapter Saddle (Vixen to Losmandy) with Spacer Pucks
Lumicon Premium Optical Tissue for telescope lens cleaning
Lumicon Premium Optical Tissue
Lumicon eyepiece adapter, 1.25 inch male to 2 inch female threads
Interior view of the Lumicon 1.25 inch male to 2 inch female adapter
Lumicon 1.25 Inch Male - 2 Inch Female Adapter
Lumicon 1.25-inch #80A blue color filter for telescope eyepieces
Lumicon 1.25 Inch #80A Blue Color Filter
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Lumicon SCT 2 inch short telescope adapter view 1 of 3
Lumicon SCT 2 inch short telescope adapter view 2 of 3
Lumicon SCT 2 Inch Adapter - Short
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Lumicon optical lens cleaner spray bottle
Lumicon Lens Cleaner Spray
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Lumicon 2-inch Neutral Density 13 filter for telescope eyepiece
Lumicon 2 Inch Neutral Density 13 Filter
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JMI Wheeley Bars for Astro-Physics pier mount with 5 inch wheels
JMI medium heavy-duty Wheeley Bars in use under an Astro-Physics pier mount
JMI - Astro-Physics Pier Mount Wheeley Bars
Farpoint 1.25 inch eyepiece extension tube, 2.25 inch length
Farpoint 1.25 inch eyepiece extension tube product line, sizes shown together
Farpoint Eyepiece Extension Tube - 2.25 Inch
Farpoint molecular sieve refill packs for SBIG desiccant plug, 10-pack contents
Farpoint SBIG desiccant plug and sieve refill montage showing components together
Farpoint Molecular Sieve Refill for SBIG Desiccant Plug - 10 Pack
JMI EV1-C dual-speed Event Horizon telescope focuser for Cassegrains, view 1 of 7
JMI EV1-C Dual-Speed Event Horizon Telescope Focuser - Cassegrain
Farpoint Universal Binocular Mount dovetail assembly, full product view
Farpoint Universal Binocular Mount dovetail assembly, alternate angle showing the dovetail rail
Universal Binocular Mount (UBM) Dovetail Assembly
Farpoint Vixen side-by-side dovetail saddle, view 1 of 3
Farpoint Vixen side-by-side dovetail saddle, view 2 of 3
Farpoint Vixen Side by Side Dovetail Saddle
Farpoint notched dew shield for Celestron 9.25-inch SCT, product overview
Farpoint dew shield interior surface showing flocked light-absorbing lining
Farpoint Notched Dew Shield - Celestron 9.25 Inch SCT
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Lumicon 2-inch #80A blue color filter for telescope eyepieces
Lumicon 2 Inch #80A Blue Color Filter
JMI piggyback camera mount for 8 inch and 11 inch SCT telescopes
JMI piggyback camera mount for 8 inch and 11 inch SCT telescopes, view 2 of 4
JMI Piggyback Camera Mount - 8 Inch/11 Inch SCT
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Farpoint 1.25 inch eyepiece extension tube, 1 inch length
Farpoint 1 inch eyepiece extension tube, side view
Farpoint Eyepiece Extension Tube - 1 Inch
Farpoint Bahtinov focus mask for Celestron 9.25-inch Classic SCT telescope
Farpoint Bahtinov focus mask product line image
Farpoint Bahtinov Focus Mask — Celestron 9.25" Classic
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Farpoint complete upgrade kit components for Zhumell Z12 and Apertura 12-inch Dobsonians
Farpoint replacement knobs installed on Zhumell Z12 Dobsonian altitude bearings
Farpoint Upgrade Kit - Zhumell Z12 and Apertura
CXB Astrodon Photometrics Sloan Filters, product photo
CXB Astrodon Photometrics Sloan Filter set, mounted view
CXB (formerly Astrodon) Photometrics Sloan Filters
Lumicon filter boxes for 2-inch filters, set of 5
Lumicon filter boxes for 2-inch filters, set of 5, alternate view
Lumicon Filter Boxes for 2" filters, Set of 5
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Lumicon 1.25-inch Night Sky Hydrogen-alpha narrowband filter for deep sky observation
Lumicon 1.25 Inch Night Sky Hydrogen-α Filter
Farpoint Vixen dovetail plate for Celestron 11-inch SCT, product view
Farpoint Vixen dovetail plate for Celestron 11-inch SCT, alternate view
Farpoint Vixen Dovetail Plate - Celestron 11 Inch SCT
Farpoint Adjustable Tri-Bahtinov Mask for 6.5 to 9.5 inch OTAs, product view
Farpoint Tri-Bahtinov focus mask diffraction pattern illustrating telescope collimation analysis
Farpoint Adjustable Tri-Bahtinov Mask — 6.5" to 9.5" OTAs
JMI EV3-N Standard Event Horizon telescope focuser for Newtonian, view 1 of 4
JMI EV3-N Standard Event Horizon telescope focuser for Newtonian, view 2 of 4
JMI EV3-N Standard Event Horizon Telescope Focuser - Newtonian
Farpoint 14 Inch Metric Universal Dovetail Plate (6831691464857)
Farpoint 14 Inch Metric Universal Dovetail Plate (6831691464857)
Farpoint 14 Inch Metric Universal Dovetail Plate
Lumicon 2 inch thread-in telescope eyepiece extension tube, 2 inch push-back
Lumicon 2 Inch Thread-in Extension Tube - 2 Inch Eyepiece Push Back
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JMI MotoFocus+ motor focuser drive for Celestron NexStar 6SE
JMI MotoFocus+ Celestron NexStar 6SE
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Farpoint parfocal ring for 1.25 inch eyepieces
Farpoint Parfocal Ring - 1.25 Inch Eyepieces
Farpoint 1.25 inch nosepiece-to-C/CS mount male adapter
Farpoint 1.25 Inch Nosepiece-to-C/CS Mount Male Adapter
Farpoint Bahtinov focus mask for Celestron 11" RASA telescope
Farpoint Bahtinov focus mask product line image
Farpoint Bahtinov Focus Mask — Celestron 11" RASA
Farpoint dew shield for Celestron 11-inch SCT, product overview
Farpoint dew shield sizing chart showing fit options for Celestron 11-inch SCT
Farpoint Dew Shield - Celestron 11 Inch SCT
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Lumicon 2-inch Easy Guider for ZWO cameras, product view
Lumicon 2-inch Easy Guider for ZWO cameras, alternate view
Lumicon 2 Inch Easy Guider for ZWO cameras
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Lumicon 2 inch drop-in telescope eyepiece extension tube, 1 inch push-back
Lumicon 2 Inch Drop In Extension Tube - 1 Inch Eyepiece Push Back
Lumicon low profile 2 inch prime focus adapter
Lumicon Low Profile 2 Inch Prime Focus Adapter
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Lumicon 2-inch Neutral Density 25 filter for telescope eyepiece
Lumicon 2 Inch Neutral Density 25 Filter
Farpoint flexible dew shield for the Orion Starseeker 127 Maksutov, fitted to telescope
Farpoint dew shield for the Orion Starseeker 127 Maksutov, interior view
Farpoint Dew Shield - Orion Starseeker 127 Mak
Farpoint dew shield for Meade ETX 90 SCT, product overview
Farpoint dew shield interior surface showing flocked light-absorbing lining
Farpoint Dew Shield - Meade ETX 90 SCT