Astrodon Sloan z_s Photometric Filter - 50mm Unmounted
Astrodon
Sloan Photometric Filters - 50mm Unmounted / z_s edge-blackened (826/920nm) is a multi-band nebula filter in 50mm for nebula imaging and light-polluted skies.
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Specifications
Filter
- Filter type
- Sloan photometric filter
- Filter size
- 50 mm / Unmounted
- Transmission
- 95%
Spectral
- Passbands
- Sloan z_s 826-920 nm
- Band count
- 1 band
Use
- Camera use
- Color or mono astronomy cameras, depending on target and workflow
Astrophotography Fit
Best for emission nebulae with one-shot color cameras, especially from light-polluted skies.
Sloan Photometric Filters - 50mm Unmounted / z_s edge-blackened (826/920nm) is a midrange multi-band nebula filter (50mm).
Best for emission nebulae with one-shot color cameras, especially from light-polluted skies.
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
- One-shot color cooled cameras or modified DSLRs
- Emission nebulae rich in H-alpha, OIII, SII, or H-beta signal
- Filter drawer or wheel sized to avoid vignetting
Not recommended for
- Broadband galaxies, reflection nebulae, or clusters as the main use case
- Monochrome SHO workflows that need separate channels
- Very fast optics unless bandpass shift and halos have been checked
Where To Buy
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| Retailer | Price | Availability | View Offer |
|---|---|---|---|
| Cloud Break Optics Cloud Break Optics | $256.30 | Out of stock Updated 5/15/2026 | View Offer - $256.30 |