hi there
Best scopes for this type of photography are Skywatcher Skyliners 8" 10" or 12"
Camera Centre
Depending on your budget
Your Dslr will need a Nikon T-ring and generic T-Nosepiece
Nikon T Ring
T Adaptor 2"
You will also need a 2x Mag Barlow lens Revelation or Televue Powermate (gives 2400mm/3000mm focal length in winter conditions) depending on your budget
Revelation ED 2x Barlow 2"
CrazyCameras - Tele Vue 2x Powermate, 2" Image Amplifier
It looks like a lot to buy but i bought 12" scope, T-ring and T-adapter, Revelation Barlow and it all came to less than what a Bigma 50mm-500mm Lens would cost
Telescope set up can be found here
Weather & Aviation Page - Contrail telescope setup
Best sites to upload images
Luchtzak Aviation • View forum - Contrail spotting
Extreme Spotting - Samoloty Na Wysokosci Przelotowej - Airlines In Flight :: View topic - Airliners In Flight - 2010 (Samoloty Nad Nami - 2010)
All the best
Leedseagle