I would like to thank all again and especially Paul for explaining the process of converting Barlow lens into 2x converter. I hope you enjoy this short video of herons' fishing made with ED80+ED 2x Barlow lense with card ring inside + Canon 5d mark 2. I made it on Jan 1 in the morning staying at least 100 meters away from them due to Barlow extention.
A personal thanks to Paul Corfield for his help
http://youtu.be/PoF4c_Ji1J0
A personal thanks to Paul Corfield for his help
http://youtu.be/PoF4c_Ji1J0