There are pin-based inputs on the 645PRO series, I imagine those are for flash sync, but I'm not sure. Never seen them used. To use a mechanical release cord, you need to have the power grip unfortunately.
Sorry, but this is incorrect.
All you need to use a mechanical cable release is either the Cable release adapters RC401 or RC402 or, if you have the left hand grip (GL401 or 402), the associated terminal adapters (RA401 or RA402). The RA401/RC401 came out with the 645 Pro, while the RC402/RA402 were introduced with the Pro-Tl.
Here is a KEH listing ($7.00 - $10.00) for what purports to be a RC401: Dead Link Removed. I think that the KEH photo is incorrect. I believe the correct photo is the one on this listing: http://www.eplevine.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=119746&Category_Code=CMF&Product_Count=248
And another listing, for one with a lock: Dead Link Removed
Last edited by a moderator: