1.25" UHC Narrowband filter

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The 600 Ångstrom passband of this new Celestron 1.25” ultra high contrast (UHC) light pollution filter provides improved contrast when compared with the wider 900 Ångstrom passband of the typical broadband filter. The filter has excellent transmission at the visually important emission lines of hydrogen-beta at 4861Å and doubly ionized oxygen at 4959Å and 5007Å. This combines with the narrow passband to make faint emission nebulas such as the Helix, Rosette, Veil, and North American stand out briskly against a dark sky. Brighter nebulas (such as the Omega, Dumbbell, Lagoon, etc.) stand out well under city lights. It can also be very useful in hunting down and enhancing very faint nebulas from a dark sky observing site.

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.

Min City Exit Pupil:
1mm
Max City Exit Pupil:
4mm
Min Dark Site Exit Pupil:
6mm
Max Dark Site Exit Pupil:
2mm
Size:
1.25"
Color:
Color of the given filter.
0 - Not a color filter
Warranty:
2 years
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Helpful Formulas
Light Pollution Filter Formula
Enter your telescope focal ratio in the formula box below to see what focal length eyepieces will work best with this filter.
Enter Your Telescope Information:
Your Telescope Focal Ratio: f/
  
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Celestron - 1.25" UHC Narrowband filter

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Celestron - 1.25" UHC Narrowband filter
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Our Product #: CUHC1
Manufacturer Product #: 94123
Price: $72.50  Ground shipping for this item is $8.95 - Click for more info
By adding 1 of these items to your cart your order total will be less than $100, and will ship within the 48 contiguous United States for $8.95. Add $27.50 to your order, however, and you qualify for free ground shipping (heavy items with fixed shipping, such as counterweights, excluded).
MSRP: $96.95
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This Celestron ultra high contrast (UHC) light pollution filter has improved contrast when compared with the wider passband of a broadband filter, making it easier to pick out faint nebulas . . .





. . . our 34th year