Hi there,
I have tested DA15 Limited vs DA14 some time ago (wrote a review). Many
have said that DA14 is better simply because it is a stop faster. Me
personally, I would avoid it at f/2.8 unless absolutely necessary. Test
it as much as you like - it's still soft and vignetting full open. At
f/4 it's much better and outperforms DA15 Limited a bit. At f/5.6 there
was no difference between 'em. Is it worth to have a MUCH larger and
heavier lens, that performs quite sluggish full-open?
One more thing - I never use DA14 without a hood. Never, even indoors.
DA15 Limited also needs protection from side-light, but at least the
hood is built-in.
The conclusion? If I wouldn't already own the DA14, I'd go for DA15 Limited.
BR, Margus
Adam Maas wrote:
All the reviews I've read indicate a slight decrease in performance
for the 15/4 over the 14/2.8 at the edge, which is consistent with the
design differences. While the 15 is slower, it's also a far less
complex (8/6) design than the 14 is (12/11) so it will remain less
well corrected. The differences in focal length is very minor and
won't have a serious impact on the design complexity.
-Adam
On Thu, Apr 15, 2010 at 11:31 PM, J.C. O'Connell <[email protected]> wrote:
I read a review on the da15 and they said it outperformed
the earlier da14 lens, which wouldn’t surprise me, its
not as wide and slower than the da14.
--
J.C. O'Connell (mailto:[email protected])
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-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Adam
Maas
Sent: Thursday, April 15, 2010 9:12 PM
To: Pentax-Discuss Mail List
Subject: Re: Ultra-wide zooms
New design, optimized for size over performance. Quite a good lens, but
inferior in performance to both the DA 14/2.8 and DA 12-24/4. Smaller than a
FA 50/1.4 though. Like the DA 21/3.2 it's marginally inferior to the older
and larger equivalent design.
-Adam
On Thu, Apr 15, 2010 at 8:51 PM, J.C. O'Connell <[email protected]> wrote:
what about the DA 15mm?
--
J.C. O'Connell (mailto:[email protected])
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-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf
Of P. J. Alling
Sent: Thursday, April 15, 2010 7:32 PM
To: Pentax-Discuss Mail List
Subject: Re: Ultra-wide zooms
Unfortunatly it hasn't been done. Most prime designs are at least 10
years old. In the case of the DA 40mm limited it looks like it's about
thirty years old, (see the M 40mm f2.8).
On 4/15/2010 1:35 PM, J.C. O'Connell wrote:
How many times do I have to tell you to make the point?
A zoom has to do much more than a prime so the zoom cannot be
"better" or even equal to a prime with BOTH using state of the art
designs and optics, period. Whatever they do to improve zoom
performance over the years can also be applied to primes.
the PDML, please visit the link directly above and follow the
directions.
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M. Adam Maas
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