UHC Filter
UHC, Ultra High Contrast Filters, is a broadband astronomical filter suppressing urban artificial mercury/sodium light and natural skyglow while transmitting useful nebular light. High transmission near OIII (496 nm and 500 nm), Hβ (486 nm), NII (654 nm and 658 nm), Ha (656 nm), and SII (672 nm) improves contrast and reveals detail. Source sections and captions: product images; specifications; reference spectral curve; how to read it, wavelength in nm on the horizontal axis and transmission in % vertically, red product curve, green nebular lines, orange mercury/sodium pollution; comparison images; gallery, Victoria Harbour Milky Way, UHC Filter ©Vincent Cheng. Packaging and notes headings are supplied. Ambient light, displays, and flash may alter color; interference coatings change color naturally with illumination. The actual item governs, including design, appearance, or specification changes not yet updated. Series materials, workmanship, and process are identical; only size differs.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Dimensional Specifications | 1.25"/2"/77mm |
| Dimensional Specifications | EOS-FF/EOS-C/NK-FF |
Key Features
Datasheet
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Supplier Information
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