Cloud Break Optics

U-Bessell Filter

U-Bessell Filter - Main image
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$142 $200 In stock

The U-Bessell Filter from Cloud Break Optics is a UV photometric filter in the UVBRI series, built with a durable, high-transmission sputtered coating.

  • UV Bessell filter designed for UVBRI-series photometric use
  • Durable, high-transmission sputtered coating
  • Available in mounted sizes: 1.25" Mounted and 2"-M48 Mounted
  • Available unmounted sizes: 31mm, 36mm, and 50mm
  • Also offered in square formats: 50 x 50mm and 65 x 65mm
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Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Timothy E. ★★★★★

I’ve been using this UVBRI filter for photometric work and the transmission is noticeably cleaner than my old ones. The coating feels solid and hasn’t scratched even after a few weeks of swapping lenses. Perfect for my imaging setup.

Harper W. ★★★★★

The sputtered coating on this UV filter is clearly well made, no visible pinholes or unevenness when I held it up to the light. Shooting UVBRI with it has been a smooth experience and I'm getting consistent results across my frames.

Elizabeth W. ★★★★★

The coating on this filter is incredibly durable and the light transmission is noticeably better than my old one. It snaps into the filter wheel perfectly and doesn't introduce any vignetting. Exactly what I needed for my UV imaging.