Who or how do they come up with lens focal lengths?
question, but I'm going to ask regardless. I was just looking at some different lenses. And started to think, how do they come up with these focal lengths? 17-55, 24-70,18-105, etc. Why not just have some uniform lenses lengths across the board? Like 10-20, 20-50, 50-105? 
In mathematics, the Fibonacci numbers are the numbers in the following integer sequence:
(sequence A000045 in OEIS).
By definition, the first two Fibonacci numbers are 0 and 1, and each subsequent number is the sum of the previous two. Some sources omit the initial 0, instead beginning the sequence with two 1s.
In mathematical terms, the sequence Fn of Fibonacci numbers is defined by the recurrence relation with seed values.
I'm thinking the numbers on the lens come from directly measuring the zoom lens after it is created. The same might be true of the f stop rating. I'm also pretty sure the guys that design our lens are first cousins with Fibonacci.
“Amateurs worry about equipment, professionals worry about money, masters worry about light, I just make pictures… ” ~ Vernon Trent
Archie wrote: This might be a completely
Why not 50-100?
I'm gonna guess that the tradition focal lengths are lengths that people chose traditionally because they look good... but in reality I have no idea why.
chasrich wrote: OK, I admit it. I used a search engine...
In mathematics, the Fibonacci numbers are the numbers in the following integer sequence:
(sequence A000045 in OEIS).
By definition, the first two Fibonacci numbers are 0 and 1, and each subsequent number is the sum of the previous two. Some sources omit the initial 0, instead beginning the sequence with two 1s.
In mathematical terms, the sequence Fn of Fibonacci numbers is defined by the recurrence relation with seed values.
I'm thinking the numbers on the lens come from directly measuring the zoom lens after it is created. The same might be true of the f stop rating. I'm also pretty sure the guys that design our lens are first cousins with Fibonacci.
OMG, someone used a search engine??? What's that??? I thought every question that needed to be answer was asked in a forum. Which is why we have forums, then those who do answer just shit an answer out.
Maybe it's a secret plot by aliens to confuse and addle the population of Earth to facilitate a takeover. And our government has the proof locked up in Area 51.cwightmanphotos wrote: I think the focal lengths are the lengths of
Shoot, learn and share. It will make you a better photographer.
fineartamerica.com/profiles/john-g-schickler.html?tab=artwork
Baydream wrote:
Maybe it's a secret plot by aliens to confuse and addle the population of Earth to facilitate a takeover. And our government has the proof locked up in Area 51.cwightmanphotos wrote: I think the focal lengths are the lengths of
Wouldn't surprise me.
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