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Forum: Pentax SLR Lens Discussion
09-15-2015, 03:54 AM
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The original mirrorless ILC!!!
All of this probably explains why there was never a 50mm f/1.2 lens in the Pentax-M series. Even the 1.4 looks like it barely fits within the casing dimensions. Plus the 1.2 K was probably still in series production back then, and anyone who really needed the extra half-stop (and was willing to pay for it) could easily have got one. Not worth the pain and cost for the engineers and designers at Asahi to try to cram all that into an M-sized package.
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Forum: Pentax SLR Lens Discussion
09-10-2015, 07:01 AM
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The only lens I need to be pin-sharp wall-to-wall is my 35mm Macro. Everything else is allowed to be imperfect at the edges. Except maybe if I get a DA15/4.0; then I want the edges to be as good as the centre.
Yes, because there are people out there who judge lenses solely on the test charts and lab ratings and don't pay attention to what's out there in the field, but who have attained positions from which they can influence the purchasing habits of others - and lens makers, who want to sell lenses, are to a certain extent obliged to service this driving force. I accept and agree that the only honest way to compare two lenses against each other is with charts etc, but you HAVE to be able to interpret the results in the context of what you're using it for. It's no use having a lens that can give you some absurd number of line pairs/mm constant across the frame if it's too awkward, heavy or expensive for the market you've pitched it at, and that's before we get to reliability and QC issues.
Eventually we're going to get to a megapixel level that no affordable lens will be able to live up to (if we're not already there). Then what?
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Forum: Pentax SLR Lens Discussion
09-10-2015, 05:31 AM
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This is why I like the older Pentax philosophy of screwdrive and IBIS. It keeps the lenses smaller and lighter, all else being equal, not to mention cheaper, since you're not sticking IS and AF technology into every single lens that goes out the door. Everything that goes inside the outer casing is an exercise in packaging and ensuring reliability, and that increases complexity, which increases costs in order to maintain reliability. If Ricoh decides to run a second-tier line of lenses with good optics, WR, quickshift and screwdrive and leave off the DC motors, I will be well content. Unfortunately I fear this isn't the way things are going to go. :(
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