Isn't a camera a machine?not again...no one uses the search feature
if you have a 10 inch lens and you extend it to 12 inches that's one stop..go from there and a tape measure; it won't break like your app and you'll actually know something instead of relying on a machine
Actually, not 50%.Thanks John, so it looks like for every time you add 50% beyond the lens' focal length, you add one stop. Easy peasy.
I smiled when I saw this, because I've been working so long with the 4 - 5.6 - 8 - 11 - 16 - 22 - 32 - 45 - 64 progression - both in and outside the darkroom - that it comes as easy to me as 50%.If you add 50% to 5.6, you get 8.4, which is close enough to 8 for my unskilled exposure and developing, and is an easier "rule of thumb" for me for negative film.
Yep. You could measure your bellows extension. I use this method because I'm terrible at math. An arithmetic error can screw up your exposure withe bellows extension.
I'm pretty good with remembering the basic apertures, but I remember that the shutter speeds were causing me confusion in another thread because of their seeming doubling. I kept avoiding the math, but now that you point out that it is the square root of two it all makes sense. I'm still learning from you, Matt!I smiled when I saw this, because I've been working so long with the 4 - 5.6 - 8 - 11 - 16 - 22 - 32 - 45 - 64 progression - both in and outside the darkroom - that it comes as easy to me as 50%.
In case you haven't noticed, each number is 1.41 (square root of two) times the next one, and each number is two times/ 1/2 the number that is two steps over.
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