ZWO EFW 7 × 36 mm — USB-C Filter Wheel
ZWO 7 × 36 mm filter wheel for these unmounted 36 mm filters, sold separately. Check their fit, mounting orientation, and vignetting depending on the camera and beam.
CHF 233.10
CHF 135.56incl. Swiss VAT
Will be ordered for you
Delivery time: 5 to 7 business days
Estimated shipping: Between November 12 and 13, 2026
Capture low-level ionized sulfur emissions with precision thanks to the Antlia SII 7nm Prime filter. With high light transmission and excellent suppression of light interference, this filter is optimized for deep-sky astrophotography, even with fast lenses up to f/2.
| Features | Detail |
|---|---|
| Type | SII 7nm Prime |
| FWHM (Full Width at Half Maximum) | 7nm |
| Center wavelength (CWL) | 672.4nm |
| Maximum transmission | >90% |
| Out-of-band blocking | OD4 (0.01%) between 300-1000nm |
| Thickness | 2mm ± 0.05mm |
| Substrate | Unglued monoblock optical glass |
| Surface quality | S/D 60/40 (MIL-O-13830 standard) |
| Transmitted wavefront | λ/4 or better |
| Parallelism | <30 arcsec |
| Warranty | 3 years against delamination |
Warning: never observe the Sun with this filter. This would cause serious, irreversible eye damage.
Here are a few accessories we've selected for this model, depending on your needs.
ZWO 7 × 36 mm filter wheel for these unmounted 36 mm filters, sold separately. Check their fit, mounting orientation, and vignetting depending on the camera and beam.
