I have one of each of them and except for the cosmetics they seem to
very similar. The K 24mm has the edge as a tactile experience. I don't
use the K very often because the A is much more convenient.
On 6/16/2015 10:03 PM, Mark C wrote:
Bojidar's site says that the K 24 f3.5 was made from 1975-77, with the
2.8 following from 1977-84. Interesting - looking at the optical
formulas the K24 2.8 and A 24 2.8 appear to be identical.
On 6/16/2015 6:11 AM, J C OConnell wrote:
When Pentax switched over to bayonet mount lenses the first series of
K mounts included the K24/3.5.
It was later discontinued and replaced by the K24/2.8. Does anyone
know the date this happened? Was
it during the M era of lenses or before? (They never made a M series
24mm).
jco
On 6/14/2015 1:00 PM, J C OConnell wrote:
Welcome to the wonderful world of SMC Pentax K series lenses. Not
only are they optically superb, they are mechanically excellent as
well.
Now you know why I have collected and use nearly the complete set of
primes...
jco
On 6/13/2015 11:12 PM, Mark C wrote:
I bought a copy of this lens from B&H a few days ago, and it
arrived yesterday afternoon. I really have to hand it to B&H - this
copy is absolutely perfect / mint / like new condition. I bought it
mostly to use reverse mounted for macro work - something that will
get me more magnification than the DFA 50mm macro using the same
extension. I made a few test shots today and I can only say I am
*really* impressed with this lens. I fully expected to see some
degree of chromatic aberration ( and was hoping it would be
correctable) - but really, there is none. None. This may not hold
up for all subjects, but in the tests I ran today it was amazing.
I am really feeling good in that the DFA 50mm macro has proven to
be exceptional, and the K 24 f3.5 looks like it will be every bit
as good. I tried a lot of lenses recently for high magnification
work - M 50mm f4 macro, M 50mm f1.7, A 28mm f2.8, F 28mm f2.8, and
XR Rikenon 28mm f2.8 and a few enlarger lenses (admittedly no first
rate enlarger lenses). The F 28mm f2.8 was the only one that
delivered acceptable results, but this K24 is clearly a cut above.
Pentax should revive some the optical formulas in these cult
classic lenses - add the latest coatings, AF and LTD lens build
quality - call them the CC Limited Series.
I also should comment that I am very positively impressed with
B&H's return process. I never had occasion to use their return
service before, but they quickly processed the return on the AF 160
ringflash that did not work out. I replaced the flash with an
AF360FGZ original model - so I will continue to use the flash setup
that I have used for the last 10 years or so. The cost of the K 24
f3.5 consumed the rest of the refund, with a little left over.
Mark
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