Here’s something to try out in the latest build of RB which you can grab from here:
http://flyingmeat.com/download/latest/#retrobatch
Also- this is a beta interface. I’m not quite to the point where the metadata stuff is done yet, but it might work for you and the functionality could use some testing and feedback.
At any rate- add a “Set Specific Metadata” node, and then a Description field. To get the aperture value in there, you can type in $assetMeta.{Exif}.ApertureValue$
, and when run that value will be inserted in there.
For other values, you’ll need to know the specification field names for now. I need to add a general UI for this- so that’ll happen at some point as well. But that’s what I’ve got for today. Give it a shot, and let me know!