Astrophotography : Barn door tracker links

http://www.awrtech.co.uk/drivesys.txt
http://www.awrtech.co.uk/drivesys.txt

AstronomyPageFiveBarnDoor
http://www.geocities.ws/kendurkin/AstronomyPageFiveBarnDoor.html

A Quartz Controlled Scotch Mount
http://www.mikeoates.org/mas/projects/scotch/

Barn door tracker - Wikipedia, the free encyclopedia
https://en.wikipedia.org/wiki/Barn_door_tracker

Double arm barn door

tangent arm drive

Double Arm Barn Door Drive - DaveTrott.com
http://davetrott.com/inventions/double-arm-barn-door-drive/


Double Arm Barn Door Drive - DaveTrott.com
http://davetrott.com/inventions/double-arm-barn-door-drive/

A Tracking Platform for Astrophotography | Gary Seronik.com
http://garyseronik.com/?q=node/52

Double Arm Barn-Door tracker general - YouTube
https://www.youtube.com/watch?v=c9ZI5vTB1TY

The Astronomical Unit - TM Projects - Motorised Double-Arm Scotch Mount
http://astunit.com/atm.php?topic=scotch

The Astronomical Unit - TM Projects - Hand-driven Scotch Mount
http://astunit.com/atm.php?topic=handscotch

Basic astrophotography image processing in GIMP - Part 1: image calibration « Synergous.com
http://synergous.com/flatpress/index.php/2011/11/26/basic-astrophotography-image-processing-in-gimp-part-1-image-calibration/

Basic astrophotography image processing in GIMP - Part 2: increasing SNR (image alignment, integration and enhancement) « Synergous.com
http://synergous.com/flatpress/index.php/2011/11/29/basic-astrophotography-image-processing-in-gimp-part-2-increasing-snr-image-alignment-integration-and-enhancement/

Fred's astrophotography - A Scotch mount without tangent error
http://www.astrosurf.com/fred76/planche-tan-corrigee-en.html