3nm Narrowband
Sale is Live!
Sale is Live!
OII, SII, and H-a filters discounted!
Losmandy G11G & G811G Mounts In Stock!
Takahashi 130NFB &
67-Flattener in stock!
67-Flattener in stock!
Taking pre-orders for Mega MOAG 2.0. Contact us today!
Space Masks now available!
How can I determine my appropriate image scale?
What ADU value should I consider for my flat frames?
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Now Get Your System on Your Terms!
- OSI Brands are all made in the USA -
– On Sale –
Farpoint 7 Inch Universal Dovetail Plate (Scratch and Dent Discount)
$41.00$34.00Farpoint 7 Inch Universal Dovetail Plate (Scratch and Dent Discount)July 14, 2020Farpoint Losmandy to Vixen Dovetail Assembly (Scratch and Dent Discount)
$70.00$59.00Farpoint Losmandy to Vixen Dovetail Assembly (Scratch and Dent Discount)July 7, 2020Astrodon 3 nm Narrowband Filter, 36mm, – HA3_36R-2000138 (2nd Quality Discount)
$748.00$654.00Astrodon 3 nm Narrowband Filter, 36mm, – HA3_36R-2000138 (2nd Quality Discount)May 15, 2020Astrodon 3 nm Narrowband Filter, 36mm, SII3_36R-2000151 (2nd Quality Discount)
$748.00$635.00Astrodon 3 nm Narrowband Filter, 36mm, SII3_36R-2000151 (2nd Quality Discount)May 15, 2020Astrodon 3 nm Narrowband Filter, 36mm Round – OIII3_36R-2000160 (2nd Quality Discount)
$748.00$635.00Astrodon 3 nm Narrowband Filter, 36mm Round – OIII3_36R-2000160 (2nd Quality Discount)May 15, 2020Astrodon Photometrics Johnson-Cousins Filter, 1.25″ Mounted, edge-blackened- B***_31R-200097 (2nd Quality Discount) (Copy)
$226.00$199.00Astrodon Photometrics Johnson-Cousins Filter, 1.25″ Mounted, edge-blackened- B***_31R-200097 (2nd Quality Discount) (Copy)February 18, 2020Astrodon Photometrics Johnson-Cousins Filter, 31mm Mounted, edge-blackened- B***_31R-200097 (2nd Quality Discount)
$226.00$199.00Astrodon Photometrics Johnson-Cousins Filter, 31mm Mounted, edge-blackened- B***_31R-200097 (2nd Quality Discount)February 18, 2020Astrodon Photometrics Johnson-Cousins Filter, 1.25″ Mounted, edge-blackened- B***_27R-200096 (2nd Quality Discount)
$216.00$193.00Astrodon Photometrics Johnson-Cousins Filter, 1.25″ Mounted, edge-blackened- B***_27R-200096 (2nd Quality Discount)February 18, 2020Astrodon Photometrics Johnson-Cousins Filter, 1.25″ Mounted, edge-blackened- B***_27R-200095 (2nd Quality Discount)
$216.00$187.00Astrodon Photometrics Johnson-Cousins Filter, 1.25″ Mounted, edge-blackened- B***_27R-200095 (2nd Quality Discount)February 18, 2020Lumicon Adjustable Piggyback Mount (Scratch and Dent Discount)
$40.00$34.00Lumicon Adjustable Piggyback Mount (Scratch and Dent Discount)February 13, 2020
– JMI Made –
JMI Carry Case for Celestron AVX Mount, Deluxe (With wheels and Extendable Handle)
$514.00JMI Carry Case for Celestron AVX Mount, Deluxe (With wheels and Extendable Handle)December 12, 2018JMI Carry Case for Celestron AVX Mount, Standard (without wheels and Extendable Handle)
$421.00JMI Carry Case for Celestron AVX Mount, Standard (without wheels and Extendable Handle)December 11, 2018JMI Carry Case for Takahashi Telescope FSQ-106N Case
$349.00JMI Carry Case for Takahashi Telescope FSQ-106N CaseJune 3, 2020JMI Case for Software Bisque Paramount MYT Mount
$421.00JMI Case for Software Bisque Paramount MYT MountNovember 19, 2019JMI Combination 1.25-inch Eyepiece and T-Thread Adapter
$65.00JMI Combination 1.25-inch Eyepiece and T-Thread AdapterMay 29, 2019JMI Counterweight Carrying Caddy – German Equatorial
$69.00JMI Counterweight Carrying Caddy – German EquatorialJanuary 20, 2018JMI Deluxe Case for Software Bisque Paramount MYT Mount
$514.00JMI Deluxe Case for Software Bisque Paramount MYT MountNovember 1, 2019JMI Dual-Speed Event Horizon Telescope Focuser – Cassegrain
$359.00JMI Dual-Speed Event Horizon Telescope Focuser – CassegrainJanuary 20, 2018JMI Dual-Speed Event Horizon Telescope Focuser – Newtonian
$369.00JMI Dual-Speed Event Horizon Telescope Focuser – NewtonianJanuary 20, 2018
– Narrowband Filters –
Astrodon 20 nm Filters – H-α 20nm (Close-Out)
$350.00 – $360.00Astrodon 20 nm Filters – H-α 20nm (Close-Out)May 14, 2018Astrodon 3 nm Narrowband Filters – H-α 3nm
$484.00 – $2,295.00Astrodon 3 nm Narrowband Filters – H-α 3nmMarch 6, 2018Astrodon 3 nm Narrowband Filters – NII 3nm
$564.00 – $1,438.00Astrodon 3 nm Narrowband Filters – NII 3nmMarch 6, 2018Astrodon 3 nm Narrowband Filters – OIII 3nm
$484.00 – $2,295.00Astrodon 3 nm Narrowband Filters – OIII 3nmMarch 6, 2018Astrodon 3 nm Narrowband Filters – SII 3nm
$484.00 – $2,295.00Astrodon 3 nm Narrowband Filters – SII 3nmMarch 6, 2018Astrodon 5 nm Narrowband Filters – H-α 5nm
$380.00 – $1,024.00Astrodon 5 nm Narrowband Filters – H-α 5nmMarch 5, 2018Astrodon 5 nm Narrowband Filters – OIII 5nm
$380.00 – $1,024.00Astrodon 5 nm Narrowband Filters – OIII 5nmMarch 5, 2018Astrodon 5 nm Narrowband Filters – SII 5nm
$380.00 – $1,024.00Astrodon 5 nm Narrowband Filters – SII 5nmMarch 5, 2018Astrodon H-β filter, 15nm bandpass (Close-Out)
$350.00 – $360.00Astrodon H-β filter, 15nm bandpass (Close-Out)May 14, 2018
