Antlia H-beta & OIII Filter — 1.25" mounted The Antlia H-beta & OIII filter passes the 486.1 nm H-beta line and the 495.9 / 500.7 nm OIII lines, while blocking light pollution from 300 to 1000 nm at OD4. Antlia designs it for both visual observing and photography of emission and planetary nebulae.
Manufacturer model: Antlia H-beta & OIII, 1.25-inch mounted · Specifications checked against manufacturer data on 2026-11-03
The Antlia H-beta & OIII filter passes the 486.1 nm H-beta line and the 495.9 / 500.7 nm OIII lines, while blocking light pollution from 300 to 1000 nm at OD4. Antlia designs it for both visual observing and photography of emission and planetary nebulae.
| Lines passed | H-beta 486.1 nm; OIII 495.9 and 500.7 nm |
|---|---|
| Peak transmission | Over 90% |
| Blocking | OD4, 300–1000 nm |
| Thickness | 2 mm ±0.05 mm |
| Use | Visual and photography |
| Format | 1.25-inch mounted, M28.5 × 0.6 thread |
FWHM and focal-ratio range not published.
Data sheet
Antlia H-beta & OIII Filter — 1.25" mounted The Antlia H-beta & OIII filter passes the 486.1 nm H-beta line and the 495.9 / 500.7 nm OIII lines, while blocking light pollution from 300 to 1000 nm at OD4. Antlia designs it for both visual observing and photography of emission and planetary nebulae.
Manufacturer model: Antlia H-beta & OIII, 1.25-inch mounted · Specifications checked against manufacturer data on 2026-11-03
