Features:
1. Multi layer anti reflection film
2. Non cement optical substrate coating
3. The electron beam gun evaporation technology using ion assisted deposition coating technology has durability, scratch resistance, and stability at CWL (center wavelength), which is not affected by temperature changes.
8. Prevent reflective laser engraving from fading
9. 90% transmittance of the main nebula emission lines (i.e. Ha 656nm, OIII 496nm&500nm, SII672nm, and H-beta 486nm).
10. 0.1% of out of band transmission, especially the main emission lines of artificial light pollution (i.e. Na 589nm, Hg 435nm, and 578nm).
11. Suitable for color CCD cameras and unmodified digital SLR cameras
CLS with a wider passband than UHC is therefore more favored when observed under mild to moderate light pollution.
13. Light pollution filters will not eliminate the effects of light pollution or increase the brightness of objects. In many cases, they increase the contrast between the nebula and the night sky without brightening the nebula.
14. Warning: SVBONY's filters are not designed for sun observation. Do not use SVBONY filters to view the sun. If you do not follow the warning, you will become blind.
Logistics information
Our products are located in Hong Kong, China, and the logistics speed depends on your specific location. According to our experience, it usually takes about 15-20 days of transportation time
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How to choose the correct size:
Step 1 Please measure your foot length carefully.
Step 2 Please choose the correct size according to your foot length and chinese size.
For example, If your foot length is 255 mm , you should choose the size 8.
