[rollei_list] Re: Rolleiflex FT focusing mechanism
- From: CarlosMFreaza <cmfreaza@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Wed, 27 Oct 2010 10:35:06 -0300
Hi Eric:
My now pretty old Pentax A 28-80 zoom at 80mm has a position
where the nearest focusing distance becomes a few centimeters from the
subject, a special lens element integrated into the general lens
allows it (a lot of zooms have similar feature); I thought something
similar could be possible for the dedicated FT Tele-Xenar considering
the new optical glasses and plastics and floating and aspheric
elements and computer software available for the lens designer and in
spite of the traditional mathematics for optics.
Carlos
2010/10/27 Eric Goldstein <egoldste@xxxxxxxxx>:
> On Wed, Oct 27, 2010 at 8:52 AM, CarlosMFreaza wrote: (snipped)
>
>> I really thought
>> that the 1,5m nearest focusing distance was obtained via the new lens
>> optical formula mainly thanks to some powerful elements combo as
>> commented in some forums and with some slight modifications for the
>> focusing parts.
>
>
>
> Hi Carlos -
>
> How would this be possible?
>
>
> Eric Goldstein
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