|
Hi John. I use the 8 inch f4 with a 3x TV Barlow + extension + manual filter wheel to get out to a bit over 4m fl - can't go much longer in fl because I don't get enough photons. Then Astronomik filters and the dmk21. As you know, f4 Newts are very unforgiving, so have fitted a moonlite focuser to make sure that everything remains fairly well aligned, but still have to be very careful with collimation (generally use one of the moons), temperature control and focusing. Thanks for your interest.
regards Ray
Last edited by Shiraz; 11-02-2011 at 09:18 AM.
Reason: add
|