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Film cameras in movies, the fail thread

Not even the slightest effort to make a mock-up... Heck, an empty toilet paper roll colored with a Sharpie and attached with duct tape would look better.
 
Not even the slightest effort to make a mock-up... Heck, an empty toilet paper roll colored with a Sharpie and attached with duct tape would look better.

Perhaps they were planning to fix it in post
 

Given that the math to get the extension factor in stops is a logarithmic equation, it’s easy enough to write a simple program for basically any programmable calculator. I’ve done so for the HP50G emulator on my cellphone. All you need is the focal length of the lens at infinity and the extension in matching units and it outputs the number of stops to compensate.
#Stops=((BellowsDraw/FocalLength)^2)*Log(2)
 

I predate you. Assembly on an IBM 7494. When we carried boxes of 2000 cards on our shoulders we were referred to as hod carriers.
 
How does one get closer to the answer with a slide rule?



















Get a shorter slide rule.​
 
How does one get closer to the answer with a slide rule?



















Get a shorter slide rule.​

I'm willing to bet that Sirius doesn't use a cel phone to access Photrio.
 
How does one get closer to the answer with a slide rule?


Get a shorter slide rule.​

The canonical answer is to use a longer rule -- you can read four digits on a 14" in the 1-2 (even the 2-3, if you're myopic) mantissa range, but if you had a 28" with the same precision of ruling, you could read four digits up to 6-7 range.

The real answer (in my experience) was to do the multiplication and division on paper (like you'd do all the adding and subtracting anyway), and look up higher precision logs and trig functions in a table (which was commonly a book several times the size of a Bible, occasionally a full shelf of book).
 

But one is physically closer with a 6" slide rule.
 
What this has to do with camera fails in movies, however, it's hard to fathom...
The progression seemed to be from a movie prop failure due to lack of historical knowledge (or more likely disinterest) to thoughts about growing up in a pre-digital culture (which presumably energizes our collective interest in film cameras). We seem to have migrated to something that belongs in the "random thoughts about life, philosophy and history" forum. In fact, a lot of what gets posted here rightly belongs there.
 
In fact, a lot of what gets posted here rightly belongs there.

This is probably more of a Lounge thread than a 35mm camera thread. Some things are posted just for interest and fun.