![[Front Filter] Clear Sky](https://api.photonicssource.com/static-files/products/image/7525126590628569089png)
[Front Filter] Clear Sky
Front-mounted without vignetting: Optolong Clear Sky was the company's first new product of 2017. It screws onto camera lenses like a UV filter, suppressing urban Na and Hg lighting to improve contrast and color. Image captions: Southern Milky Way, Chile, Clear Sky Filter ©Yuri Beletsky; Shilin Milky Way, Clear Sky Filter ©Yu Le; APOD, Large Magellanic Cloud, Clear Sky Filter ©Yuri Beletsky; Clear Sky Filter ©Yuri Beletsky. Precision processing and strict quality control underpin the stated Yulong quality. Packaging: silver-card carton; PP plastic box; imported high-pressure white EVA lining. Notes: ambient light, display differences, and flash may alter perceived color; the actual item governs. Interference coatings naturally change apparent color with illumination. Design, appearance, or specifications may change before descriptions are updated; the actual item governs. Materials, workmanship, and process design are the same across this series; only size differs.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Product Dimensions | 77mm/82mm |
Key Features
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