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Old Mar 16, 2011, 5:25 PM   #1
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Default What lens would you like to see Pentax bring out ?

I'd like to see a DA * 400 mm....around a F 5.6....kind of like the Canon 400 mm L F 5.6.

I've thought about something similar to a Sigma 10-20mm....but I find my Pentax 12-24mm seems to do the job for me...very happy with that .

Well that's about it for me.

Would would you like to see Pentax bring out...lens - wise ?
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Old Mar 16, 2011, 10:17 PM   #2
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I agree about the DA*400, but I wouldn't be able to afford it. It would be nice to have a prime that's longer than 300.
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Old Mar 16, 2011, 11:53 PM   #3
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I agree about the DA*400, but I wouldn't be able to afford it. It would be nice to have a prime that's longer than 300.
If Pentax does bring out a 400mm F 5.6, I'm hoping that it would be the price and lens quality (excellent) of the Canon 400 mm F 5.6 L.

I think that (Canon) is around $ 1500 in Canada.

In the USA it would be cheaper as almost everything is...btw, don't know why as our dollars are more or less at par.
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Old Mar 17, 2011, 12:08 AM   #4
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70-200 2.8
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Old Mar 17, 2011, 2:12 AM   #5
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I'd probably go along with a DA* 400 f5.6, or maybe a touch faster though it probably wouldn't help much. I always look for a bit of added versatility in a long tele by being able to use a TC, but there's no SDM TC so the point is rather moot. With an f5.6 lens, a 1.4x would bring it to f8 max, so AF would be a bit dodgy.

The price would have to be competitive or it wouldn't sell. I've seen used FA*400/5.6 s going for over $2K USD. At prices like this, I don't think it would sell enough to justify the mfg or release.

What might be better is a revolutionary design or materials, like a slower version of the Canon 400/4 DO (Diffractive Optics) -- it's a 400/4 that weighs 4.3 lbs including the tripod mount (300/2.8s are typically 5-6 lbs with the same 112mm filter size and a little shorter than a 400/4) -- or some kind of 400/5.0 Aspherical design that would be the same size and weight as the normal 400/5.6. An analog of this would be the Tamron 28-75/2.8 XR Di which uses a 67mm filter instead of the "normal" 72mm (or larger) filters of all of its competitors. People could probably be convinced to pay more for something that's outrageously good, but different.

All that being said, I probably wouldn't buy a DA* 400 at any speed though I shoot at 300mm or longer for over 90% of my shooting. I get much more useful reach and usability from my 300mm f4.5 and f2.8s + the 1.7x AFA. If I use a 1.4x TC with any of them, I get a pretty good 420mm f6.3 of f4.8 respectively. There would be little motivation for me to get a shorter lens that's only 1/2 stop faster or slower respectively but would give me little IQ advantage for the $1500 + cost.

BTW, Canon has an interesting concept in development -- the EF 200-400mm f/4L IS USM Extender1.4x. This lens has a built-n 1.4x TC, so it's both a 200-400/4 and a 280-560/5.6 with the Extender activated. If Pentax could design a 400/5.6 Extender 1.25x (Which would make it a 500mm f6.3) with superb optical quality at both FLs, and price it at or under $2K USD, I'd buy one.

Scott
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Old Mar 17, 2011, 7:34 AM   #6
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Another lens I'd really like would be a wide angle tilt/sift lens at a reasonable price. I think it would be fun to play with being able to correct perspective without using photoshop's skew tool.

A 70-200 f2.8 isn't of interest to me - it's too long at 70 for my shooting style, I find the 50-135 more useful.
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Old Mar 17, 2011, 10:48 AM   #7
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I won't argue with any of the suggestions so far. But how about a 135-400mm zoom to go with the new 18-135? WR and DC motor for zooming just like the existing lens... f/3.5-5.6 would be just fine, as long as it was sharp with good color and contrast.
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Old Mar 17, 2011, 12:40 PM   #8
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something like a 85 1.8 or 1.4 and a 30 or 28 1.8 or 1.4 would be nice also that is less then 500 dollars.
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Old Mar 17, 2011, 11:32 PM   #9
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Quote:
Originally Posted by Biro View Post
I won't argue with any of the suggestions so far. But how about a 135-400mm zoom to go with the new 18-135? WR and DC motor for zooming just like the existing lens... f/3.5-5.6 would be just fine, as long as it was sharp with good color and contrast.
Hi Biro,

This is a good idea -- with 2 lenses, you could cover 18-400mm with pretty good IQ. I would just suggest that the telephoto zoom should prioritize IQ at the long end unlike so many tele zooms, as this is where many of the previous releases with a range out to 400mm have fallen a bit short.

This would be ideal in my mind because with the shorter FLs, you have a faster max aperture, and it's easier to shoot these stopped down a couple of stops, but you have a lot less room, aperture-wise, at the long end as it's only one to two stops before diffraction starts to effect resolution at f8-11, and being able to shoot at wider apertures (with correspondingly faster shutter speeds) helps more at the long end where camera shake effects IQ the most. I must admit to some bias here. . .

Priced reasonably, this lens would sell well.

Scott
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Old Mar 28, 2011, 7:23 PM   #10
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Pentax really need something beyond 300mm, preferably 400mm at f5.6 to keep the price affordable for the majority.
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