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Well, I can explain it all really simply. 10X8 and 5X4 are just 8x10 and 4X5 accidentally turned sideways crossing the International Date Line.
It isn't even mathematics, it's basic arithmetic. If you're shooting one of those formats, and know that you're printing to those sizes, you're presumably past having to think about aspect ratio in the first place.
I'm not suggesting that anybody should change how they think about aspect ratio. I wanted to mask 4x5 and 8x10 sheet film for particular aspect ratios (see the link in post #73), came across this thread, realised that I approach this from a perspective that differs from that of most of the posts and decided to put forward an alternate view. It might be helpful to some future readers.
Last edited by r.e.; 29-Nov-2021 at 22:28.
Lets see . . . .5/4=1.25 4/5=0.8
10/8=1.25 8/10=0.8
7/5=1.4 5/7=o.71
In all sincerity, does this help?
Drew Bedo
www.quietlightphoto.com
http://www.artsyhome.com/author/drew-bedo
There are only three types of mounting flanges; too big, too small and wrong thread!
I am not sure I understand the question. Maybe those ratios aren't what you need to know.
Drew Bedo
www.quietlightphoto.com
http://www.artsyhome.com/author/drew-bedo
There are only three types of mounting flanges; too big, too small and wrong thread!
I think that it's neat to know that 4x5 and 8x10 share the same aspect ratio. Notwithstanding some of the posts in this thread, I would like to think that nobody is actually going to disagree with that. Beyond that, I don't think that you need to know anything unless you want to scale an image up or down or create an image that has a particular aspect ratio. For the latter, choice of aspect ratio is an aesthetic decision than can be driven by issues like what your subject is.
For example, no doubt you've seen both standard wide screen and anamorphic wide screen films. A standard widescreen image is notably taller than an anamorphic widescreen image. One of the reasons that Steven Spielberg shot Jurassic Park in standard widescreen is that there are dinosaurs in it and he wanted his dinosaurs to look tall and dangerous. Seriously Midget dinosaurs don't cut it. If you want to see the height relationship between a number of aspect ratios, see the thread linked in post #73 above, and in particular the table attached to post #4 in that thread.
If all you're doing is shooting 4x5 and deciding what standard paper size to print it on, you already know what the options are and I wouldn't worry about this.
Last edited by r.e.; 1-Dec-2021 at 16:49.
I just noticed that this thread is many yeasrs old. Does the OP care anymore?
Drew Bedo
www.quietlightphoto.com
http://www.artsyhome.com/author/drew-bedo
There are only three types of mounting flanges; too big, too small and wrong thread!
But where are plate sizes. aspects, ratios, rules, examples
http://www.edinphoto.org.uk/1_early/...hy_-_sizes.htm
When did Metric sizes emerge
Expiring minds must know
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