bdial - I used a variety of lenses on my Nikon. Mostly i used my Nikkor 50mm, mainly b/c the lens on the Argus is also 50mm. The only difference between the two is the aperture and probably the quality of glass. (Nikkor = f/1.4, Argus = f/3.5)
Nicholas - I think that's it. I checked the negs and they are just like the prints (imagine that!) The Argus negs are 'vivider' than the Nikon negs.
I was cruising the forum a little trying to dig up some old threads on shutter accuracy and turned up this little tid-bit of info.
do you think i could just use a microphone held up to the shutter?