On Mon, 9 Aug 2004 14:33:51 +0100 (BST), Kostas Kavoussanakis wrote: >> My favorite use for it was to turn a 50/1.4 into a sort of 85/2.4 macro. > >85/2.8, it does not go under that, says the manual.
You got that mixed up a bit :-) The manual states that you can not (reliably) use the 1.7x AF adapter with a lens slower than f/2.8. So the 50/1.4 is fine. The resulting largest f-stop for the combo is simply the lens one multiplied by the converter magnification (1.7 here), so the 1.4 will be 1.4 * 1.7 = 2.38 This is a fixed relationship, and equates to one and a half stops light loss. Regards, JvW ------------------------------------------------------------------ Jan van Wijk; http://www.dfsee.com/gallery
