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Oh those changing focal lengths!


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#1 Tim O'Connor

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Posted 29 July 2008 - 06:18 PM

This is from a Sony website

http://www.sony.ca/x...cam_ex3_bro.pdf


"A 2/3-inch-type lens** can also be used with the PMW-EX3
camcorder via the mount system by using a 2/3-inch type lens
adaptor*** that is equipped with a 12-pin lens connector. This
illustrates the breadth of lens choice,including even
cinema-style lenses,to suit every specific shooting requirement.


**In this configuration,the resulting focal length will be 1.37 times the
actual focal length of the lens."


Yes, probably many people know that what is meant here is that the lens change can have
the effect in appearance of having a different focal length due to a different angle of view
but the focal length does not actually change. Still, how many times are there postings on here, including from me once or twice in the past, of people who get confused about focal length questions because of perhaps working so far with mostly fixed lens cameras and not having yet worked often enough with several lens changes per camera to be learning more by experience than by manufacturer's publications.

When I saw this, I recalled instantly what has been drilled into my memory by many members of this forum, "Focal length is focal length is focal length." or "A 50mm lens is a 50mm lens is a 50mm lens no matter what."
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#2 Chris Keth

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Posted 29 July 2008 - 09:39 PM

There is certainly no help from marketing departments in that department. Good job remembering the cinematography.com mantra, "a 50mm lens is a 50mm lens is a 50mm lens."
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#3 Adrian Sierkowski

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Posted 29 July 2008 - 09:44 PM

Flashbacks of my freshmen year in film school. . . .
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#4 Chris Keth

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Posted 29 July 2008 - 10:29 PM

Flashbacks of my freshmen year in film school. . . .


Flashbacks of teaching that freshman class when I was a senior in film school. :ph34r:
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#5 Tim O'Connor

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Posted 29 July 2008 - 11:11 PM

There is certainly no help from marketing departments in that department. Good job remembering the cinematography.com mantra, "a 50mm lens is a 50mm lens is a 50mm lens."




You're one of the people on here I have to thank for imparting that. There was one thread where you, David and some of the other folk on here really hammered that point and I flashed on it today as soon as I read that line.

Was Adrian in your class?
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#6 Adrian Sierkowski

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Posted 29 July 2008 - 11:19 PM

Nah, I had an evil TA from another country. . .
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#7 Tim O'Connor

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Posted 29 July 2008 - 11:42 PM

Nah, I had an evil TA from another country. . .



By the way, can't wait to hear you attempt saying you "must be daft" with your Texas accent. That'll work.
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#8 David Auner aac

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Posted 30 July 2008 - 02:26 AM

Gez, no wonder we get all these newbies coming on here asking stuff like that. When marketing people ever learn to ask the techs before writing bs like that. But then again, the techs probably won't know either. Maybe they could hire us as consultants? :D

Cheers, Dave
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#9 James Steven Beverly

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Posted 30 July 2008 - 02:32 AM

Good job remembering the cinematography.com mantra, "a 50mm lens is a 50mm lens is a 50mm lens."

Unless it's a50mm anamorphic lens....which is STILL a 50mm lens but it's gonna mess with ya. :D
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#10 Tim O'Connor

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Posted 30 July 2008 - 06:58 AM

Unless it's a50mm anamorphic lens....which is STILL a 50mm lens but it's gonna mess with ya. :D



Troublemaker.
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#11 Adrian Sierkowski

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Posted 30 July 2008 - 09:19 AM

I have a feeling "you must be daft," it outside my Texan accent abilities. . . though "howdy," always works pretty well.
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#12 Leo Anthony Vale

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Posted 30 July 2008 - 03:25 PM

Unless it's a50mm anamorphic lens....which is STILL a 50mm lens but it's gonna mess with ya. :D


To paraphrase Fay Dunaway in 'Chinatown':

"It's a 50! It's a 25! It's a 50! It's a25!"
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#13 James Steven Beverly

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Posted 31 July 2008 - 01:45 AM

:lol: :lol: :lol:
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