645 format vs. 35mm???

[MattKing]

personal[/I] view there isn't much difference between 35mm and 6x4.5... It's a 1cm or 10mm height difference which is about a 20% difference where I feel I can use slower films and proper processing to make up that difference

35mm Vs 6x7 is almost 1.8 or double the size... Now that's a difference... No amount of processing in my ability or film speed could make up for that large of a difference

Just my 2 cents

FWIW:

A 135 negative is 24x36mm = 864 square mm

A 6x4.5 negative is 42x56mm = 2352 square mm

A 6x7 negative is 56x69.5mm = 3892 square mm.

So the ratios are:

a) 6x4.5 is 2.72 times the size of 135;
b) 6x7 is 4.50 times the size of 135; and
c) 6x7 is 1.65 times the size of 6x4.5.

All medium format sizes are taken from the manuals for Mamiya equipment.

 

[heespharm]

hahah oh yeah... forgot about them sprockets... what if your shooting the sprockets??? meh your completely correct! ;-P

 

[heespharm]

FWIW:

A 135 negative is 24x36mm = 864 square mm

A 6x4.5 negative is 42x56mm = 2352 square mm

A 6x7 negative is 56x69.5mm = 3892 square mm.

So the ratios are:

a) 6x4.5 is 2.72 times the size of 135;
b) 6x7 is 4.50 times the size of 135; and
c) 6x7 is 1.65 times the size of 6x4.5.

All medium format sizes are taken from the manuals for Mamiya equipment.

woah nice math... yeah ur correct... I was only considering height of frame.. but if you talking surface area there's a load of difference!!!..

 

[TareqPhoto]

FWIW:

A 135 negative is 24x36mm = 864 square mm

A 6x4.5 negative is 42x56mm = 2352 square mm

A 6x7 negative is 56x69.5mm = 3892 square mm.

So the ratios are:

a) 6x4.5 is 2.72 times the size of 135;
b) 6x7 is 4.50 times the size of 135; and
c) 6x7 is 1.65 times the size of 6x4.5.

All medium format sizes are taken from the manuals for Mamiya equipment.

How about those math compared to large formats [4x5 and larger]?

 

[lxdude]

woah nice math... yeah ur correct... I was only considering height of frame.. but if you talking surface area there's a load of difference!!!..

Yeah, and though 135 is about 20% smaller than 645 in each linear dimension, 645 is about 75% taller and about 50% wider than 135 in each linear dimension!

 

[heespharm]

4x5 or 20 inches squared equals about 12900mm squared = roughly 15 times the resolution!!!!

 

[TareqPhoto]

135 was looked a bit small to MF, now when i get LF i see that MF is small to LF, i don't want to imagine what about 8x10 to 4x5 or 20x24 to 8x10.