Well, after several weeks, my Lumicon #8 filter has arrived. The first thing I noticed was a change in the case itself. All my other Lumicon filters; Wratten, OIII and UHC have small hard plastic cases. The writing font/style on the housing is also slightly different to my other Lumicon Wratten filters. The crown is a different design, and appears to have a 'cross-hatch' grip. The threads seemed fine and went into everything I threaded it into. The Lumicon #8 certainly looks like a quality filter. Compared to a TS Optics (GSO) #8 (shown on the right above) it seems to have a much more subtle colour, which is possibly indicative of a slightly higher transmission rate. Daylight testing against the GSO #8 and a Baader Fringe Killer the Lumicon does appear to be less intense. This bodes well for using as a minus cyan filter on achromatic refractors.