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Antlia H-Beta - OIII 1.25"
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.
Specifications
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
Manufacturer documentation
Antlia H-beta & OIII filter
Compatibility notes FWHM and focal-ratio range not published.
Reference
85528
Data sheet
Blocking
OD4, 300–1000 nm
Format
1.25-inch mounted, M28.5x0.6
Lines (nm)
486.1; 495.9; 500.7
Peak transmission (%)
>90
Thickness (mm)
2 ±0.05
Use
Visual and photography
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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