[Foto] pentax_digiagain

[Fiso_PENTAX]

Hello pentaxosok,

>
> Boris Liberman wrote:
> 
>> So if I were to modify K/M lens so that it would have proper contacts 
>> and transfer widest/narrowest aperture value to the body, would 
>> *ist(D) be able to meter in fully manual mode? If so, we might be in 
>> not so bad a shape. 
> 
> It is not possible to midify an SMC or SMC-M lens to behave like an
> SMC-A.  The reason is that the former ones have a logarithmic aperture
> coupling and the latter a linear one.  The *ist D requires linear, so
> even if you modify the lens mount to simulate the presence of the SMC-A
> contacts, the aperture will not operate properly.  Furthermore, such a
> modification would simulate an SMC-A lens set to a numeric aperture, and
> the *ist D requires as minimum and SMC-A lens set to "A".
> 
> Cheers,
> Boz

 Es utana nemsokkal:


>
>>   It was a deliberate, cynical move to force owners of old lenses to
>>   buy new ones. It was also carefully planned over several years,
>>   starting with the release of the MZ-50.
> 
> Although you may be right, I note that the MZ-6 and MZ-7, introduced
> after the MZ-50, as well as the MZ-3 and the MZ-5n, of about the same
> time as the MZ-50, were fully compliant. Why did they bother?
> 
> This makes it hard for me to dismiss the "lack of time" theory. Time
> will tell, if they release in the future a backward compatible
> digital, we will know for good :-) There are two factors that tell me
> that, for some at least, the upgrade is inevitable: the fact that this
> digital effects a 1.5 multiplication of the focal length, which means
> that wideangles (always expensive) need a bit of rethink (how many
> below-20 K/Ms are still out there?); and the fact that the digital
> body costs near $2,000 in the UK, which means that if you can order it
> in September 2003, you most probably already have the FA 20-35, or the
> 28-70/2.8 or sth similar (and yes, you bought that too on the first
> day it came out :-).


Meg egy erv amellett hogy kivarjuk a masodik generacios Dist-et....

IMHO....



-- 
Best regards,
 Fiso_PENTAX                          mailto:pentax1 at freemail.hu