Chengdu Yafei Optical Instrument Factory
Chengdu Yafei Optical Instrument Factory YOPHY stays with beauty and time.
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HD MRC double-sided multi layer B270 glass Square Reverse GND filters for camera lens
Square Gradual Neutral Density Filter Desript
SGND filter is generally used in the shooting contrast large landscape,production and ensure the correct exposure and later.
| name | optical density | optical file number | transmittance |
| ND2 | 0.3 | 1 | 50.00% |
| ND4 | 0.63 | 2 | 25.00% |
| ND8 | 0.9 | 3 | 12.50% |
| ND16 | 1.2 | 4 | 6.25% |
| ND32 | 1.5 | 5 | 3.13% |
| ND64 | 1.8 | 6 | 1.56% |
| ND128 | 2.1 | 7 | 0.78% |
| ND256 | 2.4 | 8 | 0.39% |
| ND512 | 2.7 | 9 | 0.20% |
| ND1024 | 3 | 10 | 0.10% |
Key features:
1.Smooth transition of the gradual area
2. Made of optical HD glass
3. Double sides multilayer coating
4. Double sides precision gringding and polishing
5. Laser etched font on surface
Other products:
100x150mm ND4 0.6 100x150mm ND16 1.2
100x150mm ND8 0.9
100x100mm CPL filter 100x100mm full ND filter
Factory Details
Chengdu Yafei optical instrument factory is located in China’s Sichuan Chengdu Shuangliu optical base,the instrument factory has first-class technical team,advanced experiments,testing and processing equipment,thousands of square meters modern standard factory production.We have very strong independent product design,R & D and sample capacity.At the same time,our company has a large number of advanced management talents and processing personnel,to ensure that the batch and mass production of our company’s products.