To the best of my knowledge both the Sigma DG and Tamron Di lenses are full frame 35mm. They are in some way "optimised" for digital. This is a quote from the description of the 17-35 EX DG:
"The design concept of this lens is especially suitable for the characteristics of Digital SLR Cameras." Exactly what this means to 35mm users I don't know, however I will soon as I have ordered the Tamron Di 28-75/2.8 for use on both the D and film 35s. For now I will stay away from the Pentax DAs except for the 16-45/4 that came with the D. I am still a long way from convinced that the D is suitable for subjects such as highly detailed landscapes. IOW: "I reserve the right to shoot whatever works best!" Don > -----Original Message----- > From: Mark Roberts [mailto:[EMAIL PROTECTED] > Sent: Tuesday, November 02, 2004 6:50 AM > To: [EMAIL PROTECTED] > Subject: Re: Which wide angle zoom for the *ist D? > > > "Jens Bladt" <[EMAIL PROTECTED]> wrote: > > >I have thought about this one too, Mark. But I'd like to check > out the fast > >Sigma: Sigma EX 18-50mm DC Pentax /2,8. > > I need a lens that will work on my film cameras as well as my DSLR... > > >I would prefer all my lenses to be at least 2.8 all the way. > > Me, too! But there isn't one in this focal length range available for > Pentax. > > -- > Mark Roberts > Photography and writing > www.robertstech.com >
