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Found 2 results

  1. Hi guys, I was wondering if anybody could give me a scientific exolanation of how focal lenght doublers work and the reason why there is a 2 stops loss. Thanks in advance
  2. Hello everybody, I've been thinking about it for a little time and I couldn't find an answer so I hope somebody could maybe give me some helpful tips. I know that the marks on a lens are put following a logarithmical pattern ( if I'm not wrong it means that the closer the more I have to spin the wheel). What I'd really like to know is how good ACs can remember by heart when it becomes necessary on the lens to start pulling faster etc etc. What I wanna know is if different lenses/manufactureres kind of follow the same patter (for example if after 8 foot marks become more distant between each others when you pull closer on a given focal lenght lens). And if not how ACs train their muscle memory on lenses they have never used. Thank you so much everybody!
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