SV139 Telescope Filter 1.25inch ND Neutral Density For Moon Viewing
2 | ReviewsKey Features
- Neutral Density Filter
- Improved Contrast
- Durable Build
- Wide Compatibility
- Multi-Layer Coating
Customer Reviews
Pawel Bartosiak
Feb 12, 2025
I especially recommend it ND1.2 and ND3.0 Good color and visibility.
William
Sep 06, 2024
I do backyard solar observing with a Herschel wedge that requires an ND filter. These work as advertised and are more economical as a bundle than individually. Now I leave the filters on the eyepieces without the need to swap between them. Time will tell about the sturdiness of these filters, but so far all of my Svbony filters are holding up just fine.
Specifications:
| Model | W9108A | W9108B | W9108C | W9108D |
| Size | ND0.6 | ND0.9 | ND01.2 | ND3 |
| Type | Neutral Density Filter | |||
| Material | Aluminum Frame, Metal Thread and Optical Glass | |||
| Barrel diameter | 1.25'' | 1.25'' | 1.25'' | 1.25'' |
| Optical density value | 0.6 | 0.9 | 1.2 | 3.0 |
| Transmission | 25% | 12.5% | 6.25% | 0.1% |
| Thread | Standard M28.5*0.6 | Standard M28.5*0.6 | Standard M28.5*0.6 | Standard M28.5*0.6 |
| Suitable moon phase | Waxing crescent moon | first quarter moon last quarter moon | Waning gibbous moonWaxing gibbous moon | Full moon |
| Thickness | 2mm | 2mm | 2mm | 2mm |
Features:
1. The 1.25'' Neutral Density Moon filter reduces glare, so you can see more lunar details and surface features with your telescope. The metal filter cell threads directly into the 1.25'' barrel of your telescope eyepiece
2. Perfectly neutral color will not alter the natural color of the moon
3. ND0.6 transmits 25% of the incoming light, ND0.9 transmits 12.5% of the incoming light，ND1.2 transmits 6.25% of the incoming light， ND3 transmits only 0.1% of the incoming light
4. We have four different sizes for you to choose from. Different sizes suitable for different moon phases. ND0.6 filter suitable for waxing crescent moon; ND0.9 filter suitable for first quarter moon and last quarter moon; ND1.2 filter suitable for Waning gibbous moon and waxing gibbous moon; ND3.0 filter suitable for full moon observation
