Yes, my FA 100mm 1:2.8 Macro gives wonderful results at infinity. ----- Original Message ----- From: "Rob Studdert" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, September 10, 2002 7:53 PM Subject: Re: Favourite K mount normal lens poll
> On 10 Sep 2002 at 16:03, Fred wrote: > > > > A50 2.8 MACRO IS NOT A "NORMAL" LENS. > > > > > IT WILL NOT PERFORM AT INFINITY AS > > > WELL AS THE OTHERS LISTED WILL. IT'S > > > COMPROMISED AT INFINITY FOR BETTER > > > CLOSEUP PERFORMANCE. > > > > I haven't found that to be true, JCO. My A 50/2.8 seems to do quite > > well at infinity (at least up to a 5 x 7 - 13cm x 18cm - sized > > print, which is the biggest photo taken near infinity with the > > 50/2.8 that I can lay my hands on here right now). > > I have also found that most macro lenses perform better at infinity, in fact > MTF diagrams for many lenses will bear this out. I have the diagrams for some > CZ lenses and my new APO 125f2.5 Lanthar. The lanthar MTF graphs cover > infinity, 1m, 1:2 and 1:1 and the results are best at infinity and poorest at > 1:1, this stands to reason as the image circle is being enlarged as the lens > magnification is increased, ie it's moving further from the mount, so all > errors are magnified. > > The SMCPA50f2.8 macro is a pretty nice little lens, if the FA version is better > as is suggested I'd be pretty impressed. > > My selection would be the same as Freds for lenses of "normal" AOV ie > > 1 SMCPA50f1.2 > 2 SMCPA50f1.4 > 3 SMCPA50f2.8 Macro > > However my defacto standard lens has become the SMCPFA31f1.8 Ltd :-) > > Cheers, > > Rob Studdert > HURSTVILLE AUSTRALIA > Tel +61-2-9554-4110 > UTC(GMT) +10 Hours > [EMAIL PROTECTED] > http://members.ozemail.com.au/~distudio/publications.html >
