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11-28-2016, 07:51 PM - 3 Likes   #1
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I really would love a DFA 24-135 f/4 WR. Too bad it doesn't exist.

I really would love a DFA 24-135 f/4 WR. Too bad it doesn't exist. To me it would be a sweet walk around with the K1. Or, imagine a DFA 24-150 f/4 WR to perfectly match the 150-450 I have? Ohh how sweet.

11-28-2016, 08:39 PM   #2
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It would be big, heavy and expensive.
Its just too big a range to cover in a fixed aperture (even F4) without the physical size getting up there and to keep the quality up across that range would make it expensive too.

There was an A28-135 F4 but it weighed 820 grams and in August 1985 cost $299 which was more than $100 over the cost of any other zoom, and only $20 less than the A*85 F1.4 and A135 F1.8 higher end primes. There was a macro function in that lens that would be omitted in a new lens, but the new lens would have the weight and size of the AF mechanism added so I would imagine that would be something of a wash for comparison.

The only stuff in the FA range that was even close was either cheap crap variable apertures or was only 28-70 F4 so I have no idea what something like that would really weigh or cost.
11-28-2016, 08:52 PM   #3
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QuoteOriginally posted by PPPPPP42 Quote
It would be big, heavy and expensive.
The Nikkor 24-120 f/4 weighs 710g and costs a grand.
11-28-2016, 08:53 PM   #4
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Tamron made a great 24-135/4-5.6, which I have. Excellent performance and very compact, just a bit wider than the excellent Pentax 28-105 DFA. With updated lens elements Pentax should just rebadge this lens, which would sell like crazy. I'm glad I bought my Tamron a long time ago and kept it. It has identical optical performance to the D-FA between 40 and 105, with weaker extreme edges 28 to 35 at 4.0 and under.

11-28-2016, 10:11 PM   #5
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QuoteOriginally posted by rdj92807 Quote
Tamron made a great 24-135/4-5.6, which I have. Excellent performance and very compact, just a bit wider than the excellent Pentax 28-105 DFA. With updated lens elements Pentax should just rebadge this lens, which would sell like crazy. I'm glad I bought my Tamron a long time ago and kept it. It has identical optical performance to the D-FA between 40 and 105, with weaker extreme edges 28 to 35 at 4.0 and under.
I also have this Tamron 24-135, and it probably should be rated a bit higher than it is. Check out the pics in the Pentax gallery.
11-28-2016, 11:08 PM   #6
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QuoteOriginally posted by PPPPPP42 Quote
A28-135 F4
The other DFA zooms that are a stop faster weigh a lot too.....
11-29-2016, 03:18 AM   #7
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QuoteOriginally posted by surfar Quote
The other DFA zooms that are a stop faster weigh a lot too.....
You can't compare pro lenses with non pro lenses.
11-29-2016, 04:48 AM   #8
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QuoteOriginally posted by kenspo Quote
You can't compare pro lenses with non pro lenses.
Well, there must not have been any Pentax "pros" back in the A lens era because all those zooms from then aren't F2.8!

11-29-2016, 05:35 AM   #9
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QuoteOriginally posted by surfar Quote
Well, there must not have been any Pentax "pros" back in the A lens era because all those zooms from then aren't F2.8!
Things are different now then back then. Cant compare a 2016 model car with a car from 1965.
11-29-2016, 06:44 AM   #10
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I imagine Pentax could pull it off at ~700-750g and 800 dollars.
11-29-2016, 07:26 AM   #11
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What makes you think so?
11-29-2016, 07:32 AM   #12
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Pentax has a history of doing it cheaper and lighter.
11-29-2016, 07:46 AM   #13
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QuoteOriginally posted by VoiceOfReason Quote
Pentax has a history of doing it cheaper and lighter.
Lately they've become Sigma clones, look at the DFA 70-200 and DFA 150-450, they are the heaviest in their class.
11-29-2016, 07:56 AM   #14
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QuoteOriginally posted by VoiceOfReason Quote
Pentax has a history of doing it cheaper and lighter.
Maybe; but that's not the case for the new D FA lenses.
11-29-2016, 07:59 AM   #15
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I would be happy with just a 24-105 3.5-5.6 type of lens to go with my 60-250.

24-105 is just barely over 4:1, it should be doable with decent quality. I'd be more concerned about no ƒ4 22-24mm prime.

Last edited by normhead; 11-29-2016 at 08:13 AM.
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