If you want as accurate parallax compensation as possible, do test shots. Unless you test it out, you won't be sure. If you are using a finder not made for your camera, small differences in camera bodies MAY give you inaccurate parallax adjustments per the markings on the finders. The key word is MAY . Or if you are the adventurous type, just let it fly and hope for the best.
Lenses actually change effective focal length as the lens is focused from near to far.
In other words, your lens actually has a longer effective focal length focused close than at infinity. Strangely enough, one of the few rangefinder cameras to compensate for BOTH angle of view and parallax are the old Polaroid pack cameras, like the 450. Interchangeable lens rangefinders generally show frame brightlines at their closest focus distance with slides. This results in infinity shots showing more on your neg than what you saw in the finder, and closeup shots which have at least what you saw in the finder. This size comparison shot shows some of the finders described above.