Not a problem if you use Pentax TCs. They apparently don't transmit focal length information. I don't know about third party TCs though. The only third party TC's I've got experience with on Pentax are K mount.
John Whittingham wrote: > Hi Adam > > >> The K100D does not permit you to override focal length parameters. >> > > Damn! > > >> But I believe that focal length and lens ID are tranmitted seperately. >> > > I'm not sure how that would help. > > >> I'm not aware of any TC for Pentax bodies which contains actual >> firmware, which would be necessary to communicate actual focal >> length to the body. Canon EF TC's have firmware and can do the calculations. >> > > It looks like it's tripod time with TC's then. > > Thanks Adam, > > John > > > ---------- Original Message ----------- > From: Adam Maas <[EMAIL PROTECTED]> > To: Pentax-Discuss Mail List <[email protected]> > Sent: Sat, 25 Nov 2006 18:49:52 -0500 > Subject: Re: FL information & SD ( was Reservations about DA 16-45) > > >> John Whittingham wrote: >> >>> Hi Christian >>> >>> >>>> It certainly is. However, with the matching 1.4x and 2x EX >>>> converters it still shows up as 300mm. I'm not sure if that would >>>> adversely effect SR (600mm vs 420mm vs 300mm). As a point of >>>> example, the Canon 300/4 and 1.4x converter show as 420mm in the >>>> EXIF data and the 600/4 + 1.4x show up as 840mm. >>>> >>> Forgive me I've been away from the list for some time, it was you who >>> > told me > >>> originally I believe, as well as showing some of your great images. I >>> > feel OK > >>> with the 300 and converters because I can enter the focal length manually >>> > as > >>> long as the camera will let me. I'm pretty sure I should be able to >>> > overide > >>> the automatic settings, but it remains to be seen. It's the zoom I'm >>> concerned with knowing some of the problems Canon owners have had to put >>> > up > >>> with Sigma lenses such as the 70-200/2.8 EX. >>> >>> Regards >>> >>> John >>> >>> John Whittingham >>> >>> >> The K100D does not permit you to override focal length parameters. >> But I believe that focal length and lens ID are tranmitted seperately. >> >> I'm not aware of any TC for Pentax bodies which contains actual >> firmware, which would be necessary to communicate actual focal >> length to the body. Canon EF TC's have firmware and can do the calculations. >> >> -Adam >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> >> ---------------------------------------------------------------------------- >> > ------------------------ > >> The information transmitted is intended only for the person to whom >> it is addressed and may contain confidential and/or privileged >> material. If you have received an email in error please notify >> Carmel College on [EMAIL PROTECTED] then delete all copies of it >> from your systems. >> >> Although Carmel College scans incoming and outgoing emails and email >> attachments for viruses we cannot guarantee a communication to be >> free of all viruses nor accept any responsibility for viruses. >> >> Although Carmel College monitors incoming and outgoing emails for >> inappropriate content, the college cannot be held responsible for >> the views or expressions of the author. The views expressed may not >> necessarily be those of Carmel College and Carmel College cannot be held >> responsible for any loss or injury resulting from the contents of a message. >> >> ---------------------------------------------------------------------------- >> > ------------------------ > ------- End of Original Message ------- > > > ---------------------------------------------------------------------------------------------------- > > The information transmitted is intended only for the person to whom it is > addressed and may contain > confidential and/or privileged material. If you have received an email in > error please notify Carmel College > on [EMAIL PROTECTED] then delete all copies of it from your systems. > > Although Carmel College scans incoming and outgoing emails and email > attachments for viruses we cannot > guarantee a communication to be free of all viruses nor accept any > responsibility for viruses. > > Although Carmel College monitors incoming and outgoing emails for > inappropriate content, the college cannot > be held responsible for the views or expressions of the author. > The views expressed may not necessarily be those of Carmel College and Carmel > College cannot be held > responsible for any loss or injury resulting from the contents of a message. > > ---------------------------------------------------------------------------------------------------- > > > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
