That should be aspheric, (damned spell checker). P. J. Alling wrote:
>The problem a number of us have had is the rear spheric element, which >is a glass/plastic composite, separates over time, with the symptoms of >the lens becoming cloudy. Don Sanderson (I believe), tried to get a >replacement from Pentax and was told that particular part was >unavailable. They might have made more, but if that's the problem the >lens is probably cooked. > >John Coyle wrote: > > > >>Peter, I had mine fixed only a month or so ago, here in Oz, so it would seem >>that parts are available. They replaced a tube thingy with guide-slots cut >>in it for various cams, so I guess that's a pretty fundamental part! >> >>John Coyle >>Brisbane, Australia >>----- Original Message ----- >>From: "P. J. Alling" <[EMAIL PROTECTED]> >>To: "Pentax-Discuss Mail List" <[email protected]> >>Sent: Wednesday, June 21, 2006 4:19 AM >>Subject: Re: Your Favorite Zoom Lens >> >> >> >> >> >> >>>Good luck, but I don't think parts are available. (The decay doesn't >>>seem to come from use, but from time, so the spares probably fail at the >>>same rate in storage as they do in the lenses). However keep us >>>informed. If they can fix it then Pentax repair will probably be >>>inundated. >>> >>>keith_w wrote: >>> >>> >>> >>> >>> >>>>P. J. Alling wrote: >>>> >>>> >>>> >>>> >>>> >>>> >>>>>It's this one Shel, with the Power Zoom feature. >>>>> >>>>>http://www.bdimitrov.de/kmp/lenses/zooms/short/FA28-105f4-5.6-i.html >>>>> >>>>>It's supposed to be quite good. However I'd never even considered it >>>>>since it's quite heavy and not very fast for all that extra weight, with >>>>>a variable aperture. If I'm giving up a fixed aperture I would want a >>>>>zoom to be very small and light as well. Just as an aside my favorite >>>>>Pentax Zoom is the 20-35 f4.0 followed closely by the 28-70 f4.0, >>>>>unfortunately the latter is becoming extinct due to lens element >>>>>separation. >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>I have one of the latter that I just (belatedly) sent to Pentax to have >>>>them >>>>bless (= fix)! >>>>I cross my fingers! >>>>I bought it in that condition, and have been dragging my feet (other >>>>things to >>>>do that have a higher priority...) >>>>If it tests okay after it comes back, I can see it becoming one of my >>>>favorite >>>>lenses. >>>> >>>>Glad you mentioned it. No telling how long it would have been! <g> >>>> >>>>keith whaley >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>-- >>>When you're worried or in doubt, >>>Run in circles, (scream and shout). >>> >>> >>>-- >>>PDML Pentax-Discuss Mail List >>>[email protected] >>>http://pdml.net/mailman/listinfo/pdml_pdml.net >>> >>> >>> >>> >>> >> >> >> >> > > > > -- When you're worried or in doubt, Run in circles, (scream and shout). -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
