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Showing 1–12 of 150 results
  • Farpoint Dew Shield – Meade ETX 90 SCT (Scratch & Dent Discount)

    $30.00 $25.00

    Scratch and Dent Discount! Minor imperfections don’t affect performance.

    Farpoint Dew Shield – Meade ETX 90 SCT is a tough cover that protects optical equipment and allows for moisture-free observing sessions.

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  • JMI Motofocus Old Style Hand Control Unit

    $25.00

    These are being sold at a closeout price because they are the older version of the HUSC. The differences are that there is no USB interface or rechargeable battery. The closeout version runs on a 9V battery and has no capability to interface with a computer for computer controlled focus. But it works fine for manual focus using the focus buttons.

     

    JMI Focuser Single-Control Hand Unit is a linear voltage control (LVC) hand unit designed to easily control a focuser motor for vibration-free focusing without the need to touch the telescope.

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  • Farpoint 7 Inch Universal Dovetail Plate (Scratch and Dent Discount)

    $41.00 $34.00

    Scratch and Dent Discount! Minor blemishes do not affect performance.

    Safely attach telescope optical tubes and accessories with Farpoint 7 Inch Universal Dovetail Plate.  Machined of sturdy aluminum with a black anodized finish, this Universal dovetail bar is 7″ long with a variety of mounting hole options for various telescopes mounts and other general purposes uses. Losmandy compatible.

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  • Farpoint Losmandy to Vixen Dovetail Assembly (Scratch and Dent Discount)

    $70.00 $59.00

    Scratch and Dent Discount! Minor cosmetic flaws do not affect performance.

    Safely attach telescope optical tubes with a D size (Losmandy compatible) Dovetail to a V size (Vixen Compatible) mount.

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  • Astrodon 3 nm Narrowband Filter, 36mm, – HA3_36R-2000138 (2nd Quality Discount)

    $748.00 $654.00

    This individually serialized filter, HA3_36R-2000138, has been scored at 9.9 and has a 12.5% discount. Astrodon 2nd Quality filters are still covered by our warranty for longevity, but are otherwise sold “as is” and are not returnable.

    Astrodon 2nd Quality Filters are sold at a discount. 2nd Quality Filters are individually evaluated and graded for edge chips, scratches, pinholes and inclusions according to the standards set below:

    Edge Chips: Score 1 point for each edge chip. Score 1 additional point for each edge chip that extends into the filter more than 2mm from the edge.

    Pin holes: Score 1 point for each pinhole. Score an additional point for each pinhole that is “large”.

    Scratches: Score 1/2 point for each scratch.

    Inclusions: Score 1/2 point for each inclusion.

    Subtract the sum of the points from 100 and divide by 10. This is the filter score.

    H-α (hydrogen-alpha) at 656 nm (nanometers) is deep red in color and the most popular narrowband filter. Hydrogen is ubiquitous in the cosmos and is present in emission nebula (North American, Pelican), planetary nebula (Dumbbell, Ring), Wolf-Rayet objects (Crescent, Thor’s Helmet) and supernova remnants (Veil). Many imagers like to present just a black-and-white H-α image of an object. It is has a beauty all by itself, like an Ansel Adams photo. However, most imagers blend their H-a data into their red RGB data to enhance structural detail while maintaining a “natural” look. Therefore, the H-α filter should be your first narrowband addition to your LRGB filters. The basic imaging set of 5 filters becomes LRGBH-α.

    Astrodon H-α filters have a center bandwidth of 656.3 nm

     

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  • Astrodon 3 nm Narrowband Filter, 36mm, SII3_36R-2000151 (2nd Quality Discount)

    $748.00 $635.00

    This individually serialized filter, SII3_36R-2000151, has been scored at 9.8 and has a 15% discount. Astrodon 2nd Quality filters are still covered by our warranty for longevity, but are otherwise sold “as is” and are not returnable.

    Astrodon 2nd Quality Filters are sold at a discount. 2nd Quality Filters are individually evaluated and graded for edge chips, scratches, pinholes and inclusions according to the standards set below:

    Edge Chips: Score 1 point for each edge chip. Score 1 additional point for each edge chip that extends into the filter more than 2mm from the edge.

    Pin holes: Score 1 point for each pinhole. Score an additional point for each pinhole that is “large”.

    Scratches: Score 1/2 point for each scratch.

    Inclusions: Score 1/2 point for each inclusion.

    Subtract the sum of the points from 100 and divide by 10. This is the filter score.

    If you want the look of Hubble Space Telescope (HST) images, such as the famous “Pillars of Creation” (the Eagle Nebula, Messier 16), then the next filter to consider adding to your collection after H-a and OIII is the SII (es-two) or sulfur filter. The SII filter, like H-a, is a deep red filter near 672 nm. H-a, OIII and SII filters provide that Hubble look for many emission nebula. Again, tri-color narrowband imaging with these three filters can be done with the moon up, so your equipment is not sitting dormant for several weeks.

    Astrodon SII filters have a center bandwidth of 671.6nm

     

     

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  • Astrodon Photometrics Johnson-Cousins Filter, 1.25″ Mounted, edge-blackened- B***_31R-200097 (2nd Quality Discount) (Copy)

    $226.00 $199.00

    This individually serialized filter, B***_31R-200097, has been scored at 9.925 and has a 11.88% discount. Astrodon 2nd Quality filters are still covered by our warranty for longevity, but are otherwise sold “as is” and are not returnable.

    Astrodon 2nd Quality Filters are sold at a discount. 2nd Quality Filters are individually evaluated and graded for edge chips, scratches, pinholes and inclusions according to the standards set below:

    Edge Chips: Score 1 point for each edge chip. Score 1 additional point for each edge chip that extends into the filter more than 2mm from the edge.

    Pin holes: Score 1 point for each pinhole. Score an additional point for each pinhole that is “large”.

    Scratches: Score 1/2 point for each scratch.

    Inclusions: Score 1/2 point for each inclusion.

    Subtract the sum of the points from 100 and divide by 10. This is the filter score.

     

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  • Astrodon Photometrics Johnson-Cousins Filter, 31mm Mounted, edge-blackened- B***_31R-200097 (2nd Quality Discount)

    $226.00 $199.00

    This individually serialized filter, B***_31R-200097, has been scored at 9.925 and has a 11.88% discount. Astrodon 2nd Quality filters are still covered by our warranty for longevity, but are otherwise sold “as is” and are not returnable.

    Astrodon 2nd Quality Filters are sold at a discount. 2nd Quality Filters are individually evaluated and graded for edge chips, scratches, pinholes and inclusions according to the standards set below:

    Edge Chips: Score 1 point for each edge chip. Score 1 additional point for each edge chip that extends into the filter more than 2mm from the edge.

    Pin holes: Score 1 point for each pinhole. Score an additional point for each pinhole that is “large”.

    Scratches: Score 1/2 point for each scratch.

    Inclusions: Score 1/2 point for each inclusion.

    Subtract the sum of the points from 100 and divide by 10. This is the filter score.

     

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  • Astrodon Photometrics Johnson-Cousins Filter, 1.25″ Mounted, edge-blackened- B***_27R-200096 (2nd Quality Discount)

    $216.00 $193.00

    This individually serialized filter, B***_27R-200096, has been scored at 9.975 and has a 10.63% discount. Astrodon 2nd Quality filters are still covered by our warranty for longevity, but are otherwise sold “as is” and are not returnable.

    Astrodon 2nd Quality Filters are sold at a discount. 2nd Quality Filters are individually evaluated and graded for edge chips, scratches, pinholes and inclusions according to the standards set below:

    Edge Chips: Score 1 point for each edge chip. Score 1 additional point for each edge chip that extends into the filter more than 2mm from the edge.

    Pin holes: Score 1 point for each pinhole. Score an additional point for each pinhole that is “large”.

    Scratches: Score 1/2 point for each scratch.

    Inclusions: Score 1/2 point for each inclusion.

    Subtract the sum of the points from 100 and divide by 10. This is the filter score.

     

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  • Astrodon Photometrics Johnson-Cousins Filter, 1.25″ Mounted, edge-blackened- B***_27R-200095 (2nd Quality Discount)

    $216.00 $187.00

    This individually serialized filter, B***_27R-200095, has been scored at 9.875 and has a 13.13% discount. Astrodon 2nd Quality filters are still covered by our warranty for longevity, but are otherwise sold “as is” and are not returnable.

    Astrodon 2nd Quality Filters are sold at a discount. 2nd Quality Filters are individually evaluated and graded for edge chips, scratches, pinholes and inclusions according to the standards set below:

    Edge Chips: Score 1 point for each edge chip. Score 1 additional point for each edge chip that extends into the filter more than 2mm from the edge.

    Pin holes: Score 1 point for each pinhole. Score an additional point for each pinhole that is “large”.

    Scratches: Score 1/2 point for each scratch.

    Inclusions: Score 1/2 point for each inclusion.

    Subtract the sum of the points from 100 and divide by 10. This is the filter score.

     

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  • Lumicon Adjustable Piggyback Mount (Scratch and Dent Discount)

    $40.00 $34.00

    Scratch and Dent Discount! Small imperfections do not affect performance.

    Lumicon Adjustable Piggyback Mount allows safe mounting of cameras and small telescopes, with 1/4-20 threaded mounting holes, onto medium and large telescopes.

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  • Lumicon 2 Inch Male – 1.25 Inch Female Reducer (Scratch and Dent)

    $15.00 $12.00

    Scratch and Dent Discount! Minor blemishes do not affect performance.

    Lumicon 2 Inch Male – 1.25 Inch Female Reducer drops into a 2″ telescope eyepiece holder and accepts 1.25″ eyepieces and accessories.

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