That's a good question, Boris. Not being a gearhead I don't closely study the fine details of lens construction, but I assumed that only glass was hard and stable enough to be ground or milled into shape with the required tolerances.
Does anyone know if plastic, or anything besides glass and coatings is used in the optical path of any K mount lenses? On Mon, Jan 6, 2014 at 12:12 AM, Boris Liberman <bori...@gmail.com> wrote: > Point taken. However I don't believe that all modern Pentax lenses are > devoid of optical plastic. Nor do I think that all the lenses that Pentax > marks as having aspherics is made by crafty glass processing techniques, > especially the inexpensive ones... > > > > > On 1/4/2014 9:46 PM, Bruce Walker wrote: >> >> Excellent! Let me know when your balsa wood jetliner is ready for its >> maiden voyage and I shall be there with my K-3 to document it. >> >> >> On Sat, Jan 4, 2014 at 2:34 PM, Boris Liberman <bori...@gmail.com> wrote: >>> >>> Bruce, let me suggest to you ever so humbly that the precision of >>> execution >>> has nothing to with material used... >>> >>> >>> On 1/4/2014 9:30 PM, Bruce Walker wrote: >>>> >>>> >>>> On Sat, Jan 4, 2014 at 2:22 PM, Aahz Maruch <a...@pobox.com> wrote: >>>>> >>>>> >>>>> On Sat, Jan 04, 2014, Boris Liberman wrote: >>>>>> >>>>>> >>>>>> >>>>>> My point is that miniaturization is reaching yet another level. And >>>>>> this camera unlike iPhone's and plethora of Android devices is >>>>>> seriously real deal. >>>>> >>>>> >>>>> >>>>> Yes and no -- real glass requires real weight and bulk. I agree that >>>>> most people (who don't care about DOF, macro, or large prints) will >>>>> stick with phone cameras. No surprise, really. >>>> >>>> >>>> >>>> Not to mention: sharpness, contrast, colour, and all the other quite >>>> significant qualities that precision glass has over plastic lenses. >>>> >>> >>> >>> -- >>> 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. -- -bmw -- 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.
