A: During the time of writing this document the widely used finders are DE-2 Standard finder, DE-3 High eyepoint finder, DW-4 6x High magnifying finder, DW-3 Waist-level finder, and DA-2 Action finder.
A: The DE-3 High Eyepoint Finder weighs 165 grams.
A: Yes, the diopter adjustment range of DW-4 is -5 to +3 DP.
A: Yes, the contraption has shutter incorporating f-stop and ready-light, sited 15 mm ceiling the center of the viewfield.
A: The High Eyepoint finder has measurements of 47.6 mm by 43.5 mm by 69.1 mm.