No ranges, you pick a focal length. There's choice for essentially every 
Pentax 35mm prime lens made between 8 and 800mm. For zooms you pick 
wahtever's closest to what length you're using at the time.

-Adam

P. J. Alling wrote:
> That was me, it was an uninformed guess, based an early display 
> picture.  Logically there would have to be some kind of range, since 
> lenses are often only within 10% of their marked focal length.  Thinking 
> about it now it would probably be better to apply a shorter focal length 
> than a longer one for better results.
> 
> Tom Lesser wrote:
> 
>> Hi Adam:
>>
>> An earlier post (can't find it now) implied that there were ranges of 
>> focal lengths listed in the SR menu.  Is that what you are finding (in 
>> K100D)?  If so, how broad are the ranges?  I have an old 28-135, for 
>> instance.  How many ranges are there to cover that lens from 
>> end-to-end?  Is it something like 28-50, 50-80, 80-100, 100-135?  And 
>> if there really are ranges, do they overlap; e.g. 28-50, 35-70, 50-100, 
>> 80-135???
>>
>> Thank you
>> Tom Lesser
>>
>> On Sep 30, 2006, at 10:15 AM, Adam Maas wrote:
>>
>>  
>>
>>> What I've been doing is mostly at one end or the other, so
>>> I've been manually entering the closest focal length when working on 
>>> the
>>> zoom. This works for me as I usually use a zoom like a multi-length
>>> prime, switching focal lengths only when needed rather than zooming all
>>> the time.
>>>
>>> -Adam
>>>    
>>>
>>
>>  
>>
> 
> 


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