Regards the "full frame" stuff, thanks Steve (and everyone). I think the term is only truly relevant for 35mm format cameras and sensors, personally, because there are simply too many different "medium format" (aka 120/220 roll film) camera formats out there (645, 6x6, 6x7, 6x8, 6x9, et al). For me, the 'definitive' full frame 120 roll-film format camera has been and always will be the Rolleiflex TLR and Hasselblad SLR 6x6 cameras, with a full-frame film format of 56x56 mm. And this despite the fact that I've owned and used more 6x4.5 and 6x9 cm format film cameras ...
You missed my favorite Hasselblad X lens, the (evidently now discontinued) XCD 21mm f/4. I don't use it so much as I use the 45P or 65, but it *is* my favorite, just like the Hasselblad SuperWide with Zeiss Biogon 38mm f/4.5 was always my favorite film Hassy...
But it's not worth going on about the full-frame nomenclature, I agree. I'm much more interested in sensor proportions and FoV with available lenses than how the digital sensor compares to a film camera. I often shoot the 907x/CFVII 50c set to square format—that is essentially a 33x33 mm format sensor—which provides close to classic Hasselblad SuperWide (38mm), 80mm, and 120mm on an A12 film back when used with XCD 21, 45P, and 65 mm lenses. Using Rui Salguiero's FoV calculator:
Width = 56 mm, Length = 56 mm, Diagonal = 79.196 mm
f - Hor Vert Diag H/V
38.0 - 72.7687 72.7687 92.3595 1.0000
80.0 - 38.5801 38.5801 52.6685 1.0000
120.0 - 26.2680 26.2680 36.5240 1.0000
Width = 33 mm, Length = 33 mm, Diagonal = 46.669 mm
f - Hor Vert Diag H/V
21.0 - 76.3145 76.3145 96.0285 1.0000
45.0 - 40.2726 40.2726 54.8175 1.0000
65.0 - 28.4869 28.4869 39.4955 1.0000
Those three FoV options have been the basis of my medium format shooting since 1966. Yeah, I'm old. ... And I do have a couple of other choices, but they never get used as much.
35mm cameras have been mostly standardized on 24x36mm format since Oskar created the first
leicht Kamera ... and because of the small film format, a much wider variety of focal lengths has been essential to getting quality results. So calling that a "full-frame" standard makes a lot more sense; although it was originally considered "double-frame" since the invention of the 35mm camera was tied together with 35mm cine format of 24x18 mm "single-frame" dimensions. (The original
leicht Kamera was intended to be an exposure test device for cine work...)
Ah, words.
G