On Mon, 9 Aug 2004, Jan van Wijk wrote: > On Mon, 9 Aug 2004 14:33:51 +0100 (BST), Kostas Kavoussanakis wrote: > > >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
No, I have got it right, here is the quote from the manual: "In the case of a lens faster than f/1.7, the compound maximum f-stop becomes f/2.8." I don't have a 1.4 lens to try it, unfortunately. Kostas
