That would be a nice addition, and I agree it would be fairly simple to 
implement.

-Adam


Juan Buhler wrote:
> I know it is a dead horse, but I think it was killed in the wrong way.
> 
> The mechanical coupler is gone for good, and there's no reason for
> Pentax to reimplement it.
> 
> But a better solution could be achieved with software. I'd like to
> have, besides the green button behavior in M mode, a similar behavior
> in P: press the green button to get correct exposure. When the light
> changes, the camera modifies the shutter speed it had selected. If you
> move the aperture ring you're on your own.
> 
> This would be a trivial firmware update, and would add a totally new
> mode for pre-A lenses.
> 
> j
> 
> 
> On 10/8/06, Adam Maas <[EMAIL PROTECTED]> wrote:
>> William Robb wrote:
>>> ----- Original Message -----
>>> From: "Adam Maas"
>>> Subject: Re: k10d and manual-aperture lenses?
>>>
>>>
>>>> In practice, the 'Green Button'/AE-lock hack on the DSLR's is simple
>>>> and
>>>> easy to use. You always set aperture on the lens for non-A lenses, and
>>>> either hit the AE-Lock (Green Button on D/K10D) and it immediately
>>>> sets
>>>> an appropriate shutter speed or you use the DoF preview to get a
>>>> metering readout. I usually do the former and it works very well.
>>>>
>>>> Av mode is usable with adaptor-mounted glass (since that is stop-down
>>>> on
>>>> any K mount body and doesn't have the aperture coupling either) or
>>>> wide-open with pre-A glass. The latter is surprisingly useful for a
>>>> serious low-light shooter like me.
>>>>
>>>> Frankly working with MF glass on the K100D is less hassle than using
>>>> the
>>>> same glass on my MX (Or any other purely manual body).
>>> You do have to keep an eye on things, since it is possible to run the
>>> meter out of range pretty quickly. It's a good idea to have a clue about
>>> what the shutter speed should be with the aperture chosen.
>>>
>>> William Robb
>>>
>> Agreed.
>>
>> Frankly, if you're going to use old glass, you should know what you're
>> doing with regards to exposure and be paying attention. Of course,
>> that's a useful skill even shooting within the metering range with A and
>> later glass.
>>
>> Note I successfully shot for quite a while with the D50 and AI-era
>> glass, which utterly lacks metering of any sort. And after the first
>> week or two I was shooting 1-2 test shots for each lighting condition
>> and leaving it at that. It's a good way to learn to expose (So is
>> shooting RVP50 in a TLR with no meter and only an exposure calculator)
>>
>> -Adam
>>
>>
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> 
> 


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