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Re: [OM] 50mm/55mm/500mm Lens questions -Reply

Subject: Re: [OM] 50mm/55mm/500mm Lens questions -Reply
From: David Irisarri Vila <valicors@xxxxxxxxxx>
Date: Fri, 18 Aug 2000 15:45:48 +0200
Hi Scott,
I´d very pleased if you could explain me how do you
calculate this.
I know that f2 goes to 1,414 and then to 0,9999=1
Now lets calculate intermediate stops!!!
f2 goes to f1,80466 (The famosus Zuiko f1,8) and then to f1,60933
and then f1,414 and f1,27614 and f1.13807 and finally f1.00000!!!
So I think f 1,27614 is one 1/3 stop faster than Zuiko f1,4
isn´t it?

Dave


"Ian A. Nichols" wrote:
> 
> On Thu, 17 Aug 2000, Scott Nelson wrote:
> 
> > No, F:1 is a full stop faster than f:1.4.
> 
> It is indeed.  F/1.2, according to my calculations, is 0.47 stops faster
> than f/1.4.  That's half a stop to you, me and any lightmeter you can
> buy.
> 
> > >>> Frank Berryman <FAB@xxxxxxxxxxxxx> 08/17/00 10:03am >>>
> > I am a little slow on the uptake this morning.  Is a f1.2 lens one stop
> > faster that a f1.4 lens?
> 
> --
> ________________________________________________________________________
> *             |                                                        |
> |  /  | |/-\  |                      Ian A. Nichols                    |
> | |   | |   | |                                                        |
> |  \-/| |  /  |                  i.a.nichols@xxxxxxxxxx                |
> |             *                    iann@xxxxxxxxxxxxx                  |
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