Jay, I regularly use 1.4 Pentax extenders on my 300MM f4.5 FA and 600mm f4.0 FA and am happy with the results. Never tried 2.0 extenders and don't intend to. Kenneth Waller ----- Original Message -----
Sent: Thursday, March 25, 2004 5:59 PM Subject: Re: tele extenders > >From: Jay Todd <[EMAIL PROTECTED]> > > >To those that have used a 2X tele-extender with a telephoto (200 or > >300mm), what do you seem to find to be the compromising element...loss > >of sharpness, contrast, etc?
