Originally posted by Lord Lucan . . . . There is no point in using anything newer as they have electrical contacts that your K1000 will not use, although they wont damage anything.
So your best choice is M-series, A-Series or Takumar, all K-mount. And I advise you should start with a standard lens, which is 50mm of 55mm focal length.
this might confuse the matter further, I hope not
As I understand it:
the camera lens acts as a substitute for the human eye which has a certain " normal " angle of view
a wide angle gives a greater than normal angle of view - think peripheral vision at the most extreme
a telephoto gives a more narrow ( lesser ) than normal angel of view ( gives the effect of seeming to bring distant objects closer and bigger )
I was taught the lens' focal lengths was to be classified as:
less than 50 mm
wide angle - example 28 mm, 35 mm
much less than 50 mm
extreme wide angle - example 10 mm, 20 mm
around 50 mm normal ( it mimics what the human eye sees as far as angles of view)
greater than 50 mm
telephoto - example 100 mm
much greater than 50 mm
extreme telephoto - example 400 mm
this was for 35 mm film cameras with the standard sensor size which matched the dimensions of a 35 mm frame on film
now since the full frame sensor in the K 1 mimics the same sensor size as what was in the film SLR the description would hold to be the same I believe
on " cropped " sensor cameras ( all modern DSLR cameras which are not " full frame " ) the sensor size is smaller ( cropped ) and the lens focal length is multiplied by the crop factor 1.5 in Pentax DSLR
so around 50 mm lenses would mimic what the human eye sees as far as angles of view of 50 multiplied by 1.5
above the 50 mm " normal " lens for a film camera appears to act like a short telephoto
did I get that right experts???