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Showing 133–138 of 138 results
  • 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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  • 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***_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, 1.25″ Mounted, edge-blackened- Rc*_27R-200038 (2nd Quality Discount)

    $216.00 $189.00

    This individually serialized filter, Rc*_27R-200038, has been scored at 9.9 and has a 12.50% 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.

     

    Read more
  • Astrodon Photometrics Sloan Filter, 50mm Round- r’2_50R-200034 (2nd Quality Discount)

    $500.00 $437.00

    This individually serialized filter, r’2_50R-200034, has been scored at 9.9 and has a 12.50% 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.

    Unlike other Astrodon filters, the Photometric filters (Johnson-Cousins and Sloan) do not come as 36mm of unmounted glass. For those who want 36mm round for use in a 36mm filter wheel, 27.5 mm of filter glass can be mounted in our 36mm adapter. More information on 36mm mount here:

    We also have a limited quantity of 12mm and 25mm (call for pricing and availability). All Astrodon Photometric filters are 100%-Coated for long-term durability and consistency of research with the highest throughput.

    NOTE: In Astrodon part numbers we pronounce the ‘ character (apostrophe)  as “prime” and the _ character (underscore) we pronounce as “sub.” So u’2_27R should be read as “u prime 2 sub 27 R

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