Actually I don't! Although I definitely wanna pick one of those up as well down the road. I just got the non commercial lens in for a decent price thanks to the shutter not functioning 100%. My main focus is for portraits/headshots with it so the 4.5 fits my needs better, at least until I can compare them both Sadly the shutter is missing a cap on top and can only run at 1/50th, dont know if cause of the cap or I just need to do a full CLA, so I'll probably reach out to Carol/flutot for repair advice and maybe some spare parts (or get a new shutter if I cant get this one going )