I've been told that it is mainly about amount og light and contrast. And my experience seem to support this. Contrast is important.
Tim Typo Mostly Harmless ----- Original Message ----- From: "J. C. O'Connell" <[EMAIL PROTECTED]> To: "'Pentax-Discuss Mail List'" <[email protected]> Sent: Sunday, September 02, 2007 6:34 AM Subject: RE: eBay Madness, Sometime you get lucky! >I would like to add that any autofocus system is going to be more > effective > at not only brighter light levels or faster fstops but also with higher > quality optics. Hence, some slower lenses may work just as well as > faster > ones at same light level if they are of extra high quality ( i.e. primes > vs zooms > or mediocre third party vs oem or Pentax lenses ). > jco > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of > Bob Sullivan > Sent: Sunday, September 02, 2007 12:18 AM > To: Pentax-Discuss Mail List > Subject: Re: eBay Madness, Sometime you get lucky! > > > Perry, > I've used it to good advantage with the 200/4 lens on shore birds. In > bright light, any f4 lens seens to do well with it. If I can find the > pictures, I'll post some samples. Regards, Bob S. > > On 9/1/07, P. J. Alling <[EMAIL PROTECTED]> wrote: >> This was taken with the A*300mm f4.0 and F 1.7x converter. It wasn't >> the brightest day, (conditions were somewhere between "cloudy bright" >> and overcast, I've found that the 1.7x auto focuses nicely with lenses > >> with maximum apertures down to f4.0 under most conditions. (it's >> really hard to get good exposures of these birds in bright sunlight). >> >> >> >> Perry Pellechia wrote: >> > On 9/1/07, Digital Image Studio <[EMAIL PROTECTED]> wrote: >> > >> >> On 02/09/07, Perry Pellechia <[EMAIL PROTECTED]> wrote: >> >> >> > >> > >> >> Nice find, I bought one of mine at a similar price, the current >> >> prices that they often acheive at auction these days seems absurd >> >> as compared. Interestingly the current Pentax lens catalogue from >> >> Japan indicates that they are still a current product. >> >> >> > >> > If they are available I am surprised that no one from Japan is >> > selling them on eBay. They would probably be able to turn a good >> > profit with the prices they go for now. >> > >> > >> >>> BTW, Any recommendations for a inexpensive 200mm lens to mate up >> >>> with the TC? >> >>> >> >> Cheap no, it loves f2.8 lenses, anything slower and the AF may >> >> become a bit flaky in anything but great light. >> >> >> > >> > That's what I was afraid of. It seems to work very well with my >> > Tamron 90mm/F2.8. I do not have many other MF lenses where a TC >> > makes sense. >> > >> > >> >> >> -- >> Remember, it's pillage then burn. >> >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.484 / Virus Database: 269.13.2/983 - Release Date: 01.09.2007 > 16:20 > > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
