One thing to watch out for is that the lens shade doesnt get in the frame...if you dont want it. For me it was easy as I shoot mainly with a hasselblad and a series of pinhole and zoneplate bodycaps...the zoneplates allow enough light transmission when shooting exterior, to be able to see the frame quite well...so I compose with the zoneplate and then if I want to shoot a pinhole version I just swap the bodycaps...same perspective and field of view...I can see if the lens shade is in the frame or not with the zone on. I also use gaffers black wrap and sculpt irregular shaped lens shades that are purposefully in the frame...kind of sculpted vignetting, if you will.