Filter · 2000–2024
Meade Instruments Series 4000 #908N Narrowband Nebular Filter 1.25"
Key specifications
| Filter type | Narrowband |
|---|---|
| Passband | OIII 496/501nm + Hb 486nm |
| Filter size | 1.25" |
| Mounted | Yes |
About
Narrowband nebular filter that zeroes in on the OIII lines (496/501nm) and H-beta (486nm), rejecting 99.9%+ of city-light emissions for high contrast on emission and planetary nebulae. Threads into 1.25" eyepieces.
Where to buy
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