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12-11-2011, 08:18 PM   #1
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Why no 28?

Why isn't there a 28mm lens in the current lineup? The current jump in primes is from 21-35 with 2 offerings at 35mm.

12-11-2011, 08:31 PM   #2
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Because pentax is weird (21, 31, 43, 55, 77)
12-11-2011, 08:33 PM   #3
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Had one, stopped making it after FA

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12-11-2011, 08:42 PM   #4
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QuoteOriginally posted by JinDesu Quote
Because pentax is weird (21, 31, 43, 55, 77)
i'm going with this explanation, pentax Is weird...and that is why I love it.

12-11-2011, 09:10 PM   #5
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QuoteOriginally posted by Docrwm Quote
Why isn't there a 28mm lens in the current lineup? The current jump in primes is from 21-35 with 2 offerings at 35mm.
Well, they do have a new 25:

Pentax-D FA 645 25mm F4 AL [IF] SDM AW Reviews - 645 Wide-Angle Primes - Pentax Lens Reviews & Lens Database

and an old 31:

Pentax-FA 31mm F1.8 AL Limited Reviews - FA Prime Lenses - Pentax Lens Reviews & Lens Database


28 = (25 + 31) / 2 = (21 + 35) / 2 , with the second option being cheaper
12-11-2011, 09:12 PM   #6
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Pentax is definitely not normal. But something like a DA 24.5mm or a DA 26mm needs to fill the gap between 21mm and 31mm.
12-11-2011, 09:23 PM   #7
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I'm lobbying for the DA 26, definitely not normal.
12-11-2011, 09:38 PM   #8
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QuoteOriginally posted by causey Quote
Pentax is definitely not normal. But something like a DA 24.5mm or a DA 26mm needs to fill the gap between 21mm and 31mm.
Why 26 and not 28?

12-11-2011, 09:48 PM   #9
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You always have the option of Zeiss 28mm f2, and Sigma offers a 28 mm prime as well.
12-11-2011, 09:56 PM   #10
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QuoteOriginally posted by Franky2step Quote
You always have the option of Zeiss 28mm f2
Zeiss has stopped making lenses for pentax K mount, so unless one appears on the second-hand market he is out of luck.
12-11-2011, 09:59 PM   #11
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QuoteOriginally posted by Franky2step Quote
You always have the option of Zeiss 28mm f2, and Sigma offers a 28 mm prime as well.
Yes, but the Sigma is huge and the Zeiss is both costly and not AF. I mean 28 was a mainstay forever and then with the change from FA to DA it disappeared from the Pentax line.
12-11-2011, 10:00 PM   #12
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how often will manual focus be a problem @ 28mm? By all accounts it's supposed to be a great lens. Just say'in
12-11-2011, 10:06 PM   #13
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QuoteOriginally posted by Franky2step Quote
Zeiss 28mm f2
And here you go: ZEISS 28MM F/2 ZK DISTAGON T* PENTAX K MOUNT USA NEW

12-11-2011, 10:09 PM   #14
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QuoteOriginally posted by Docrwm Quote
Why isn't there a 28mm lens in the current lineup? The current jump in primes is from 21-35 with 2 offerings at 35mm.
The jump is actually from 21-31, plus the two 35s.
12-11-2011, 11:16 PM   #15
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QuoteOriginally posted by JinDesu Quote
Because pentax is weird (21, 31, 43, 55, 77)
Consider FF FOV equivalents:

APS-C . 135/FF
--------------
21mm -- 31.5mm
31mm -- 46.5mm
43mm -- 64.5mm
55mm -- 82.5mm
77mm -- 115.5mm

Thinking outside the box?

A couple make traditional sense. 31mm is close to APS-C 'normal' and 43mm is dead-on 135/FF normal. 55mm is dead-on for APS-C portraiture. The rest... don't reproduce the same old formulae, don't fit in the usual slots.

But maybe that's an incomplete picture. Here are the current Pentax primes AFAIK, with FF FOV equivalents:

DA14/2.8 ---------- 21mm
DA15/4 Ltd -------- 22.5mm
DA21/3.2 Ltd ------ 31.5mm
FA31/1.8 Ltd ------ 45.6mm
FA35/2 ------------ 52.5mm
DA35/2.4
DA35/2.8 Ltd Macro
DA40/2.8 Ltd ------ 60mm
FA43/1.9 Ltd ------ 64.5mm
FA50/1.4 ---------- 75mm
DFA50/2.8 Macro
DA*55/1.4 --------- 82.5mm
DA70/2.4 Ltd ------ 105mm
FA77/1.8 Ltd ------ 115.5mm
DFA100/2.8 WR Macro 150mm
DA*200/2.8 -------- 300mm
DA*300/4 ---------- 450mm

Notice the clusters around 14-15 (ultrawide), 31-35 (long-normal), 40-43 (midrange), 50-55 (short-portrait), 70-77 (long-portrait), and the macros. No, it's not a complete lineup -- but certainly an *interesting* lineup. Is their a method to their madness?
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