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[OM] Re: 80mm macro experiences?

Subject: [OM] Re: 80mm macro experiences?
From: "Piers Hemy" <piers@xxxxxxxx>
Date: Thu, 9 Mar 2006 17:17:12 -0000
I *think* I disagree with your first sentence, Paul, but I can't be sure ...
because the terms you use in the second sentence are, umm, imprecise, though
I accept that they don't seem so to you, because you know what you mean!

I think all that we can agree on is that putting the 90mm lens on any camera
(Pen F, OM, E-1 or 4 x 5 plate camera) doesn't change it's *actual* focal
length. 

--
Piers 
 
-----Original Message-----
From: olympus-owner@xxxxxxxxxx [mailto:olympus-owner@xxxxxxxxxx] On Behalf
Of Paul Martinez
Sent: 09 March 2006 16:55
To: olympus@xxxxxxxxxx
Subject: [OM] Re: 80mm macro experiences?


That's incorrect. If you put the same lens on an E1 the object will be twice
the size because the *effective* focal length of the lens has doubled.

Paul

-----Original Message-----
From: olympus-owner@xxxxxxxxxx [mailto:olympus-owner@xxxxxxxxxx]On
Behalf Of Piers Hemy
Sent: Thursday, March 09, 2006 8:47 AM
To: olympus@xxxxxxxxxx
Subject: [OM] Re: 80mm macro experiences?



Walt's right.  Here's another way of thinking of it.

That lens on an OM camera will fill the frame with an object 24 x 36 mm.  On
your E-1, the same lens will show the same object at the same size - but you
won't see so much of it because the frame is smaller.

--
Piers

-----Original Message-----
From: olympus-owner@xxxxxxxxxx [mailto:olympus-owner@xxxxxxxxxx] On Behalf
Of NSURIT@xxxxxxx
Sent: 09 March 2006 16:02
To: olympus@xxxxxxxxxx
Subject: [OM] Re: 80mm macro experiences?



In a message dated 3/9/2006 9:58:21 AM Central Standard Time,
hiwayman@xxxxxxx writes:

If I  took my 90/2.8 Tamron macro and put it on one of my Graphics and shot
something 1:1, I would get a circle in the middle of a much larger piece of
film, but it would still be 1:1.  Same thing if you use it on an  itty-bitty
piece of film, or sensor, and only get part of it.  1:1 is  1:1.





OK.  I think I have it . . . unless it leaves me again.  Bill  Barber


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