Thanks Tim I have no problem with the 1.5x IQ it's just it limits me to manual focus, I may as well buy a manual focus 400mm f/5.6 and have the added benefit of SR.
John ________________________________________ From: pdml-boun...@pdml.net [pdml-boun...@pdml.net] On Behalf Of Tim Øsleby [maritim...@gmail.com] Sent: 11 May 2009 18:42 To: Pentax-Discuss Mail List Subject: Re: PESO - Wagtail Focus wise the F 1,7 does a good job with my DA* 300. It's locks fast, sometimes faster than the DA* 300 alone. I was refering to image quality when saying it didn't seem tp like other lenses. But fringing or abrivation or whatever it is, is unaceptable. steping down at least two steps, more in high contrast situations is needed In good light it locks with the K-500/4,5 on motifs with good contrast. But IQ wise the combo is practically useless. Won't focus with Tokina ATX 150-500/5,6. So I believe the real limit is around f:4,5 with high contrast lenses. Could be wrong off cource. -- MaritmTim 2009/5/11 John Whittingham <jo...@carmel.ac.uk>: > Hi Tim > > I'm having troubles with the DA*300/4, whenerver I fit a Kenko 1.5x SHQ > converter to the rear it hunts just either side of the subject constantly but > never locks focus. When used on a tripod some time ago it worked just fine, > the Teleplus i.7x converter displays the same behaviour when hand held but > more so. On my last visit to Mere Sands Wood I ended up going back to my > Sigma 300/4 APO and 1.4x EX converter and they worked fine. I'm wondering if > investing in a Tamron 1.4x converter may be the way to go, if I can find one. > Pentax seem to have dropped the SDM converter from the roadmap, I woder if > they may have discovered the same problem. BTW the Kenko and Teleplus support > SDM, the Sigma does not. > > Best regards, > > John > ________________________________________ > From: pdml-boun...@pdml.net [pdml-boun...@pdml.net] On Behalf Of Tim Øsleby > [maritim...@gmail.com] > Sent: 11 May 2009 14:21 > To: Pentax-Discuss Mail List > Subject: Re: PESO - Wagtail > > The Pentax F 1,7X AF. The one that provides semi-AF on MF lenses. > > A handy thing, but it dos'nt seem to like my other lenses. > > -- > MaritimTim > > 2009/5/11 John Whittingham <jo...@carmel.ac.uk>: >> Nice capture, we have a breeding pair here where I work, see them on a >> regular basis but have never photographed them. What 1.7x TC were you using? >> >> Regards, >> >> John >> ________________________________________ >> From: pdml-boun...@pdml.net [pdml-boun...@pdml.net] On Behalf Of Tim Øsleby >> [maritim...@gmail.com] >> Sent: 11 May 2009 00:32 >> To: Pentax-Discuss Mail List >> Subject: PESO - Wagtail >> >> This little fella came passing by today. >> http://www.diskusjon.no/index.php?act=attach&type=post&id=300079 >> >> Handheld 300/2,8 + 1,7x >> >> -- >> MaritimTim >> -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
