Michael Slade said:Curious about the ULF sizes and ratios (i.e. 12x20 = 3:5).
I know that the 12x20 format was very popular, and am wondering about other negative sizes, their corresponding ratios, and why they were/are popular.
I know I see things in a pretty traditional wideangle view, and am trying to decide if how I see the world corresponds to a common ULF film size ratio.
Any thoughts or ideas?
Thanks!
Ole said:Classic German sizes (plate sizes) are:
6.5x9
9x12
13x18
18x24
24x30
30x40
40x50
All in cm. There were some other sizes for a while, but these are the ones which survived - and all of them from 13x18cm and up are standard paper sizes on the European continent. It used to drive me crazy when I could only find 18x24cm paper when I wanted to print portraits on 8x10" (20x25cm). The measurements are colse, but the proportions are very different.
Dave Wooten said:I once read that Clyde Butcher was the impetus behind Ron Wisner's 6 x 10
could be easily enlarged and same ratio as 12 x 20- close to the golden mean...guess we could just ask Clyde...btw his everglades studio was right on Tamiami Trail...wasnt that the path of the last hurricane?
another thread could be a discussion of golden mean/ratio...the ancient Egyptians were into it and the Mayans,
janvanhove said:12x16" is simply the inches measurements of the 30x40 cm european format, isn't it?
PJ
jimgalli said:Aspect ratios are interesting. Most being a variation of the 4 to 5 oversquare. As someone has said cutting that aspect in half gives a normal 2 to 5 for pano's 3 to 5 is less common but it's interesting that Wisner has offered one as a 6X10 custom back. I think he's only built less than 20 of those. An interesting aspect to me is the so called "golden mean" which is about 1.62 to 1 and is only seen in the uncommon 7X11 format and the now obsolete but once common 5X8. I haven't heard of 12X16 but I have heard of 12X15 across the pond. If you're curious to see if any of these aspects are more magical than others, don't put in an order to Ron Wisner for a 6X10 and wait for 4 years. Simply get your scissors out and mask a 4X5 down to see if you like something different.
jimgalli said:An interesting aspect to me is the so called "golden mean" which is about 1.62 to 1 and is only seen in the uncommon 7X11 format and the now obsolete but once common 5X8.
Dave Wooten said:divide one into the other 10/8 =5:4 8/10 = 4:5
1.6 or therabouts golden mean
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