_tb.jpg "F9131D-(5).jpg")
- UHC filters or light pollution reduction filters are designed to selectively reduce the transmission of certain wavelengths of light;especially those produced by artificial light
- Sky background is darker;and contrast of emission nebulae are noticeably improved;the perfect filter for viewing nebula from light polluted skies;or for boosting the contrast of nebula from dark sky sites
- Due to its ability to produce exceptionally sharp and clear images;this UHC filter is considered one of the most popular astronomy accessories;it can be used not only for celestial observations but also for astrophotography
- 1.25'' barrel diameter simply attach to eyepiece cased in a sturdy transparent case;standard filter thread for 1.25" eyepieces and other accessories
- Optical glass lens;aluminum frame;significantly reduces light pollution;great for city and suburban observation
In Stock
Good filter
I was skeptical of this filter considering the price, but was very pleasantly surprised. It really does make a considerable difference, the sky becomes much darker when using it, allowing for better contrast. With it, the Ring nebula was way more pronounced in my telescope, when before it was just a faint smudge.
Great Quality/price filter
In line delivery time (less than 2 weeks).
Great filter quality, price way below other webpages or other brands.
Does it job accurately .
Thank you SVBONY
| Model | F9131A | F9131B | F9131D |
| Size | 1.25'' | 2'' | EOS-C |
| thickness | 1.85mm | 1.85mm | 1.85mm |
| Type | Ultra High Contrast Filter (UHC Filter) | ||
| Thread | Standard M28.5*0.6 | Standard M48*0.75 | Canon EOS-C |
1. Light Pollution Reduction UHC Filters are designed to selectively reduce the transmission of certain wavelengths of light specifically those produced by artificial light. This includes mercury vapor and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere
2. The new ultra high contrast Svbony UHC filters has improved contrast over the typical broadband filters. Sky background is darker, and contrast of emission nebulae are noticeably improved
3. We provide you with three different sizes to choose from, 1.25'' and 2'' for eyepiece, EOS-C filter is for Canon EOS-C interface
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