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mechanical marvels
Lens: Pentax SMC-K 28mm f3.5 Camera: Pentax K3 Photo Location: UK ISO: 320 Shutter Speed: 1/50s Aperture: F5.6 
Posted By: Top banana, 07-18-2016, 01:29 PM

messing about again with my SMC-K 28mm f3.5 lens, and suddenly thought about another mechanical marvel sitting on my shelf...

For those wondering what it is, it's a Curta calculator - an amazing fully mechanical device that can do complex addition, subtraction, multiplication, and division. As a size comparison it is pictured next to my SMC-M 135mm f3.5 lens.

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07-18-2016, 07:49 PM   #2
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That's really cool! I'll have to look up how it works now.

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