On Wed, 06 Feb 2013 15:33:39 -0500, nospam <nos...@nospam.invalid>
wrote:
I too was a Pentax man, and had a very nice collection of screw mount
lenses, all Super Multi Coated and in excellent condition, ranging
from 20mm to 500mm. These all metal and glass lenses were worshipped
in their day and still look and feel very impressive.
When it came time to go digital, I considered getting a system so I
could keep using these cherished lenses. (Couldn't figure out why
Pentax wouldn't release a Spotmatic with a digital back!) But after
due consideration, I opted instead for a whole new start (with Canon).
The main reason at the time was that the Canon lenses and bodies work
so well together, with features like autofocus (which I shunned
before). I was ready to embrace the new technologies. (Same reasoning
if I had chosen for Nikon.)
What I found out later was that the new Canon zoom lenses way
outperformed the old Takumar primes. See, I bought a low-cost adapter
and was able to use all those old lenses on the Canon body. And the
results were not good. The 500mm, which was VERY expensive in its day
and looks very impressive, had terrible chromatic aberration, poor
sharpness and low contrast. Even my consumer grade 70-300mm Canon zoom
with the 500D closeup attachment outperformed my 100mm Takumar Macro
prime.
I still love the Pentax Spotmatic system and will keep my core system
(body and 3 lenses), but it's because I'm a collector, and they were
fine items in their day. Everything is usable and I could go out and
shoot a roll of IR film, or shoot without a battery in sub-zero
weather no problem... but mostly it will sit on a shelf.
If good files are your goal, I suggest you select a good modern
system, whether Canon, Nikon, Sony, or other. I'm pretty sure your
photography will benefit.
W