On 6/3/09, Tim Bray, discombobulated, unleashed:

>OK, I confess to being a relative newbie in taking photography
>seriously, but, um... what would you use a lens like that for?  I have
>the 21mm pancake Limited and boy, it grabs a huge piece of the
>landscape... -Tim

I presume you are using this on a 1.5 crop sensor like the K20D ? The
angle of view and the size of the sensor means you are not exploiting
your 21mm lens to its maximum potential. The angle of view on a K20D
with a 21mm lens is similar to using a 31mm lens on film or 36X24
sensor. Here is a 15mm lens on a 1.3 crop sensor:

<http://www.cottysnaps.com/snaps/landscapes/images/pic25.html>

So the angle of view is similar to a 20mm lens on 35mm film or 36X24
sensor - and even this is still not fulfilling the lens' design capabilities.

If you are shooting film, then 15mm may be wider than you would want -
21mm is plenty wide enough for most people. Having used the K15mm 3.5 on
film, 1.5 and 1.3 crop sensors, I wouldn't want to be without it!

--


Cheers,
  Cotty


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