Hello, I am new to this Forum and not sure how things work yet, however, I have a new K5 that I just purchased without a lens as I believe that while the Kit lens (18-55) is ok there are a lot better lenses available around this size. I already have a Pentax-F SMC 1:4-5.6 35-80mm and also a Pentax-F SMC 1:4.5-5.6 100-300mm (Both autofocus lenses) from my Mz5-n Film camera. These lenses seem to work fine on the K5.
I understand that these lens need to be multiplied by 1.5 to indicate their trye size when fitted to my K5.
Therefore, am I on the right track to think I require something like a 17-70 Sigma or Tamron to fill the void of the wider angle?
Which of these is better?
I was also thinking I really need a wider aperture and am considering the 2.8 in one of these choices.
I do not have a lot of experience in the Photography world and would appreciate any comments (positive or negative) about my equipment and/or ideas.