Product Description
The filter's advanced technology multilayer dielectric coatings let the filter achieve an outstanding transmission of over 97% across the entire passband, with a total blockage of the prominent light pollution lines. The improved transmission translates to maximum image brightness and contrast. Users of smaller 4"-11" telescopes will especially appreciate the high efficiency, and larger scope users will love the rich star fields and detailed subtle nebular shadings that are left intact. Ion beam hardened coatings provide excellent durability and resistance to scratching. The high transmission, sharp cutoffs, and more moderate 600 Ångstrom (60nm) passband of the UHC/LPR filter retains a more natural view, yet significantly boosts overall contrast. Imagers will appreciate the broader passband and inclusion of an extremely efficient 6563 Ångstrom H-Alpha passband. Comes in a protective clear plastic case. A ribbed rim makes it easy to thread in and remove the filter from an eyepiece in cold weather when wearing gloves.
Enter your telescope focal ratio in the formula box to the right to see what focal length eyepieces will work best with this filter.
Tech Details
Max City Exit Pupil | 4mm |
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Max Dark Site Exit Pupil | 6mm |
Min City Exit Pupil | 1mm |
Min Dark Site Exit Pupil | 2mm |
Size | 2" |
Weight | 1.5 oz. |