Originally posted by wizofoz Tell me I'm crazy, but as the sensor hypotenuse of FF, crop and 4/3 sensors are roughly 30mm, 43mm and 70mm, don't the 43mm, 30mm (or 31) and 70mm measurement seem very familiar to Pentaxians?
Is there any relationship to sensor size and square/square root factors? i.e. 31 x 1.4 = 43.4. 50 x 1.4 = 70, 55 x 1.4 = 77
Is there anything here to explain the unique Pentax focal lengths?
Well, Britain has now formally recognised Druids as a religion, so that might have something to do with it.
But seriously, yes of course you could derive many mathematical equations from the extensive range of lens focal lengths and other mfgr specs of camera components, but don't forget to account for the mythical anticlockwise vortex of draining water in the southern hemisphere and that the sun only ever rises on days that end in y.
Then apply Fermet's theorem to the result and see what you get. I predict it should be mind numbing.
But as we all secretly know, the underlying problem is that Pentax designers all must smoke funny weed which accounts for why only Pentax ends up producing such weirdo non-conformist focal length sizes like 31mm, 43mm, 77mm etc. with equally weirdo f/stops like 1,9, 2.4, 3.2 ad infinitum.
(the mere thought of rounded numbers for simplified market understanding and sanity completely escapes them for some reason)
And I also suspect that they plan a fixed 666mm zoom lens for the future, just to show Canikon who really rules the game - but don't quote me on that.
Fwiw: The fear of the number 666 is known as hexakosioihexekontahexaphobia.
(in case you might want to know that bit of trivia.
Hope that answered your question, or at least confused you as much as you've confused everyone else with the enigma of your original post.