That's excellent data - many thanks. I'm keen to be fair to the
marque, even if I'm talking about the Samsung. I'll borrow some old K
and KA lenses if I can and check, now I know what to look for.
Andrew Fildes
afildes@xxxxxxxxxxxxx
On 09/04/2006, at 9:01 PM, Chuck Norcutt wrote:
> Lens compatibility back to all Pentax M-42 and K and KA mount lenses.
> You can still put all those Adaptall lenses to good use. Here's a
> response I got from a Pentax user when I asked about compatibility
> with
> the older lens lines:
>
> ----------------------------------------------------------------
> You can use any M42 screw mount, K or KA lens on any of the Pentax
> *ist
> DSLRs.
>
> With M42, you obviously need an M42 - K bayonet adapter. You focus at
> full aperture then stop the lens down to the taking aperture before
> taking the meter reading.
>
> With K, you don't need an adapter, and you can focus at full aperture.
>
> The following applies to M42 or K: Depending on which *ist DSLR
> you are
> using, the procedure is slightly different, but a press of a button
> stops the K lens down (the m42 lens is already stopped down) to the
> selected aperture, takes a meter reading and sets the appropriate
> shutter speed. It's like a single shot aperture priority AE.
>
> If you carry on taking pictures without obtaining another meter
> reading,
> the camera will continue with the same shutter speed. If you need
> a new
> meter reading, just press the button again and the camera will
> select a
> new shutter speed.
>
> It sounds complicated, but it isn't. You can master it in 5 minutes.
> It works great. The exposures are spot on, every time.
>
> With KA lenses it is even better. You get all the exposure modes the
> camera body offers. So KA lenses give you program AE, shutter
> priority
> AE, aperture priority AE and metered manual. Obviously there is no
> autofocus, but you do get focus confirmation.
>
> The backward compatibility offered by Pentax is the best of any
> brand of
> DSLR. You get to use legendary Pentax and independent lenses in
> M42, K
> and KA bayonet mounts. The one shot AE mode is great - you can take
> several shots of the same subject knowing all will be consistently
> exposed. This is particularly useful when shooting several shots that
> you will later stitch together, such as a panorama.
>
> The only other DSLRs that offer compatibility with manual focus lenses
> such as our beloved Kirons is Nikon, and only on their top D1* and
> D2* models. Even those won't accept pre-AI lenses, whereas just about
> every M42 and K bayonet lens will work on the Pentax *ist DSLRs.
> ----------------------------------------------------------------
>
> It's surprising that this exceptional backward compatibilty record
> isn't
> given more press. I'm sure Oly could have done the same with the
> 4/3's
> mount but chose not to. Maybe they figured it would hamper acceptance
> of 4/3's by other manufacturers if the mount had faithful vs.
> similar OM
> characteristics. Anyhow, lens compatibility is the real Pentax story.
>
> Chuck Norcutt
>
>
> Andrew Fildes wrote:
>
> For the life of me, the only selling point I can see to
>> the Pentaces is the 'smaller/lighter' claim. Anyone know better what
>> their selling point might be?
>
>
>
> ==============================================
> List usage info: http://www.zuikoholic.com
> List nannies: olympusadmin@xxxxxxxxxx
> ==============================================
>
==============================================
List usage info: http://www.zuikoholic.com
List nannies: olympusadmin@xxxxxxxxxx
==============================================
|