ProAmateur
Active member
One big omission in your post .You forgot that the Redrock mount will not control auto-focus. Also you only get 20 hours of battery life on a nine volt. You'll need either multiple rechargables, or a lot of 9v's...A costly propostion that makes the price difference negligible.
Your point about auto focus is a good one. However, way back when Birger announced the adapter, he said it would control auto focus and even IS on Canon EOS lenses. Then as time progressed and we saw a few demos here and there of the Birger mount, I never saw anything relating to auto focus nor IS. It was all demos of iris control and electronically controlled repeatable focus points via follow focus. Then (after all the controversy) Birger went radio silence on us. So in all honesty, I am wondering if the Birger mount (as it ships in first iteration) is going to control auto focus or IS on Canon lenses.
Truthfully, I am afraid what we are going to see in the Birger mount is iris control and electronic focus control (with either wireless or wired follow focus). But, that's just me. I hope I am wrong.
Regards,
G.