Ver clever William, yes the lens focal lengh doesnt change but the view
you get is no longer that of an 85mm lens because of the crop factor.
Which is what I was refering too. But of course you know that and are
just being a smarty pants.
A.
On 19 Jul 2004, at 16:13, William Robb wrote:
----- Original Message -----
From: "Antonio Aparicio"
Subject: [Norton AntiSpam] Re: Replacement for the FA 50 and 100
Macros? (Re: Pentax is Dying)
Yes, but because of the crop factor your 85mm portrait lens is now
a
132mm lens. Therefore for a portrait lens you would use say the
50mm,
hence a different DOF, no?
Wrong.
The focal length of a lens is fixed.
If the manufacturer makes an 85mm lens, then that is what it will be,
no matter what format is put behind it.
Wishful thinking won't change that either.
William Robb
