OM-D how to set focal length for legacy zoom
Hi All - I've searched and must be using the wrong criteria as I can't find what I'm looking for.
The question is - I have a Vivitar Series 1 70-210 lens from my Oly OM-1 that I'd like to use on my OM-D. I bought the appropriate adapter to mount it. What I don't understand is how to tell the camera what the focal length is (I need to do that, correct?) and then what focal length would I tell it for a zoom?
Thanks in adavance!