Removable sun iris diaphragm bracket for D-ERF 70/90/110 filter
Versions;
Infinitely adjustable iris diaphragm 13 – 113mm
(#2459300) ;
Suitable for sizes 75, 90 and 110mm of filter holders for D-ERF
Energy protection filter 75-180mm (different versions / variants)
available);
For optimal adjustment of a telescope aperture when observing with
an H-alpha surface filter from SolarSpectrum (also for
suitable for third-party products) ;
Made of CNC machined aluminum.