SV139 Telescope Filter 1.25inch ND Neutral Density For Moon Viewing
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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
