Optolong SHO 3nm Filter Set - 36mm Unmounted
Optolong
Optolong SHO 3nm (3 Filter Set) - 36mm Unmounted is a narrowband filter in 36mm for mono emission-line imaging.
imaging-filter midrange
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Specifications
Filter
- Filter type
- SHO narrowband filter set
- Filter size
- 36 mm / Unmounted
Spectral
- Passbands
- SII 672.4 nm (3 nm) / H-alpha 656.3 nm (3 nm) / OIII 500.7 nm (3 nm)
- Band count
- 3 bands
- Narrowest bandpass
- 3 nm
Specifications
- Substrate / coating
- Non-cementing optical glass
Use
- Camera use
- Mono astronomy cameras
Astrophotography Fit
Best for isolating emission lines with a mono camera and filter wheel.
Optolong SHO 3nm (3 Filter Set) - 36mm Unmounted is a midrange narrowband filter (36mm).
Best for isolating emission lines with a mono camera and filter wheel.
Choose filter size around the sensor diagonal, telescope speed, and filter-wheel or drawer geometry. Flats are still required; a filter can improve contrast, but it will not rescue tilt, bad focus, or poor calibration.
Best paired with
- Monochrome camera, matching filter wheel, and autofocus offsets
- Ha/OIII/SII emission nebula projects
- Long integrations with darks, flats, and careful star handling
Not recommended for
- Unmodified color cameras as the primary workflow
- Targets dominated by broadband continuum signal
- Users who want natural star color with minimal processing
Where To Buy
Some links on this page are affiliate links. Prices and availability are pulled automatically from each retailer and updated daily.
| Retailer | Price | Availability | View Offer |
|---|---|---|---|
| Mile High Astronomy Mile High Astronomy | $960.00 | In stock Updated 5/12/2026 | View Offer - $960.00 |
| Agena AstroProducts Agena AstroProducts | $1,060.00 | In stock Updated 5/13/2026 | View Offer - $1,060.00 |
| High Point Scientific High Point Scientific | $1,060.00 | In stock Updated 5/14/2026 | View Offer - $1,060.00 |