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
