Hi all, I'm thinking of going into digital astro-photography. I was wondering how the Celestron 9.25 F/10 carbon fiber tube assembly would work on my GM-8 mount. The exposures would be a maximum of five minutes. I hear that the 9.25" SCT has less mirror shift than the 8" SCT. I would attach a Nikon Coolpix 5000 using the TeleVue adapters. Anybody have any experience using the 9.25" SCT and what were your impressions of this scope? Thanks, Debbie