I'm not sure about Barlow, but we bought a Fotodiox Pro from ebay, and are happy with the results. The mounting surfaces are metal, and there is a retention mechanism, so the Nikon lens won't rotate off. It was recommended by somebody who claimed to try out a number of adapters, and I'm happy with the purchase.

Fotodiox Adapter - Michael Schoenfeld
 

Hello Jon,

Michael Schoenfeld here,

Barlow and I are using the Fotodiox adapter on three of the four Nikon mount lenses we are using with the 5DMKII - the other one is from Cameraquest (the owner Stephen Gandy is a little "Unique", to say the least).

I just wanted to thank you for all of your hard work to "hack" the settings for manual control!

Barlow and I are trying to do our part to help out - he is quite the analytical mind, as are you.

Thanks again,

Michael Schoenfeld

michael schoenfeld : 801.532.2006

Thanks, Michael,

BTW, nice photos on your site. Portfolios One and Two are especially compelling.

Josh,
In case it is useful to you, Shake was just updated a few weeks back to 4.1.1 - seems there is still life in there and it suggest that there may be a full update at some point soon?
Nick.

trying to view the clip, but it's asking for a password.

i am on a quest to find some sort of workflow for a 24P solution for the 5dmkII. my goal is to shoot my next feature film completely with the 5dmkII, we'll see what comes first... a firmware update or decent workarounds or the scarlet.