On 4 Jul 2004 at 21:25, Verge Scott wrote: > Actually from the testing I have read good 1.4 > teleconverters can actually be very good and almost > indistinguishable at times. If used with a high > quality prime lens also.
Quite correct, 30 years ago this wasn't the case, now a lot of the Prime/TC combos even wide open deliver near the resolution of the best colour films. > I just wasn't sure about the pentax ones cause I've > only read about some nikon and canon and the > kenko/tamron ones. I had a Kenko 7 element AF (pass-though) TC for a short while, up against the current Pentax TC it really delivered poor contrast (regardless of the lenses taking aperture), I suspect the Pentax AR coatings help a great deal. > So has anyone seen any tests of the pentax ones? Yes but not in conjunction with the lens you intend to use. It's hard to go wrong with the 1.4X-S and the 2X-S TC they are pretty good and contrary to some reports the 1.7AF TC is a very good performer also. I've sold my nX-S TCs but I retained the 1.7AF and the two nX-L TCs, I'm pretty pleased with them. Really their biggest downfall is that they don't support the AF function on AF lenses. Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
