P. J. Alling wrote:
That seems like a good price for it. It's life span is problematic as
the separation can happen while it's simply sitting on a shelf. The
problem was an aspheric element that was a spherical glass lens molded
into an optical plastic element with the same refraction index. (It
shows as one lens element in the optical formula
http://www.bdimitrov.de/kmp/lenses/zooms/_optics/28-70f4.gif ).
Which one? There are green, red and clear elements on that image.
Any chance it's the front-most (green) element?
Thibouille wrote:
Yeah I remember that and if I remember well, not easily repairable by
Pentax.
I wonder if at 50 Euros it would be worth the try r not.
I just got mine back from Pentax, and they charged a shade over US$80.
Of course, I don't know how long it will last, nor how good a job they
did. (That's one thing about film. Takes a while to get the results! We
get spoiled!)
However, Pentax did say what work was done, just not specifically.
Sort of like they replaced and repaired all necessary, tested focus and
zoom with an AF test body, tested the lens electronically, etc.
It's entirely possible they simply replaced that lens assembly with off
the shelf stock. You're not going to get much labor (time) out of a
$49.51 labor charge!
Nor, for that matter, much out of a parts charge of $26.66!
Ahhh well. I'll put a roll thru the camera and wring out the lens.
I don't yet have an interchangable lens DSLR, so it will HAVE to be film!
I would expect that if I don't subject the lens to extremes of
temperature, and avoid shock, it might last for a very long time!
On Sun, Jun 7, 2009 at 12:43 PM, Adam Maas<a...@mawz.ca> wrote:
The issue with this lens is that it's quite prone to unrepairable
element separation.
-Adam
Considering what I paid to have mine repaired/replaced, that's not much
of a big deal!
My original cost for this 99.9% perfect condition lens, and the factory
repair cost still adds up to less than $170 ~ and for a useful,
reportedly fine performing AF lens, that is CHEAP!
IMMHO! keith whaley
On Sun, Jun 7, 2009 at 4:24 AM, Thibouille <pentaxl...@gmail.com> wrote:
I know this lens was well regarded in film era but what about its
digital performances?
Would it be worth chasing it?
What price would be acceptable for that lens ?
Thank you all.
--
Thibault Massart aka Thibouille
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