ZWO M54 - M54 7.5mm ADAPTER X-Y The L-Ultimate filter has been

The L-Ultimate filter has been optimized for excellent halo performance

FWHM 25nm with CWL at H-alpha wavelength of 656

2" Backfocus 78 mm maximum (from the base of the M48 thread) Tube weight 13

FSQ-85EDX system chart with RD-QE0

Length 670 mm

ZWO M54 - M54 7.5mm ADAPTER X-Y The L-Ultimate filter has beenThe ZWO M54 to M54 7. 5mm adapter has female M54 x 0. 75 threads on one side and male M54x 0. 75 threads on the other with an optical thickness of 7. 5mm. The adapter features internal M48 x 0. 75 female threads allowing the attachment of standard 2" filters. It is designed to replace the original adapter ring for the FF65 107 130 focal reducers, but can be used as a standard M54 extension tube. Specifications Optical length 7. 5 mm Connection