Thanks, Mike.
Regarding the Astrodons - I'm still waiting for a night of really good seeing, but I will say this at this stage: they produce a very pleasing result from a colour standpoint.
My Jupiters taken with them already look more natural and pleasing to the eye than those I produced using the Astronomik filters. With the latter, I had to do a fair bit of colour balancing etc to produce an image I was satisfied with.
The Astrodons seem to produce a more ToUcam-like colour quality...which is, for me, is quite a positive.
However, the Astrodons are not parfocal (at least not on the nights I've used them) and the light throughput is about the same as the Astronomiks...at least with the C9.25 working at around 8000mm fl. It might be a different story using the aperture and focal length of Anthony's scope? I wouldn't know
