Popular British astronomy magazine Astronomy Now (http://www.astronomynow.com/) published a review of
G2-8300 by Nik Szimanek in its June, 2013 issue. You can check the
PDF versionof the article (published with the
Cloudynights.com published an online review of G4-16000 with
external filter wheel by Michael Miller. Go to Cloudynights web site to see also images captured
with G4 on the remotely operated 152 mm
APM apochromatic refractor located in New Mexico.