DAYSTAR QUANTUM H-ALPHA FILTER SE Bandwidth:0.3 - 0.5Å These rings belong to the

These rings belong to the PLUS system (Prima Luce Universal System) that includes a large variety of telescope rings

All the Geoptik dovetail bars are CNC machined and fully anodised

47 mm (without the barrel)

1mm female

6x30 finderscope

DAYSTAR QUANTUM H-ALPHA FILTER SE Bandwidth:0.3 - 0.5Å These rings belong to theDayStar's Quantum range of solar filters are designed for professional and serious amateur applications and offer absolute precision control over wavelength transmission. The SE grade meet the critical DayStar quality control criteria applicable in all visual and some photographic environments. The precision Quantum housing incorporates ALL of the desired features for today's solar astronomer and then some. Operation couldn't be simpler, just plug it