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01-04-2011, 09:04 PM   #91
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QuoteOriginally posted by abacus07 Quote
My primary usage would be backpacking and travel. So landscapes and architecture are my primary usages.
I agree - an excellent concept, hope it comes true & soon. But how will I ever update my K-7 when items like this pop up?

01-04-2011, 09:15 PM   #92
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I'm OK with 3.5-4.5

QuoteOriginally posted by sewebster Quote
I can understand not having f/2.8 but a constant aperture would be nice. Maybe it's just a pet peeve.
Some of my favorite 'classics' from past kits were f/3.5-4.5, so those numbers work for me. If it keeps the size down a notch, even better! In my imaging life I consider 3.5-4.5 a lucky number.. except it's two.
01-06-2011, 07:17 AM   #93
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QuoteOriginally posted by FullertonImages Quote
I think Pentax could make that lens smaller, especially if it is only an APS-c lens.
If you look at it, APS-C lenses are not significantly smaller than their full-frame equivalents. For whatever reasons, it is mostly about how the lens is designed and not the circle it produces. There were full-frame pancakes almost as small as the DA Limiteds. And the FA 77 is only a hair longer than the DA 70 when you include the hood.
01-06-2011, 07:53 AM   #94
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QuoteOriginally posted by rparmar Quote
If you look at it, APS-C lenses are not significantly smaller than their full-frame equivalents. For whatever reasons, it is mostly about how the lens is designed and not the circle it produces. There were full-frame pancakes almost as small as the DA Limiteds. And the FA 77 is only a hair longer than the DA 70 when you include the hood.
when you include the hood, yes
how about weight? the DA is lighter

01-06-2011, 03:11 PM   #95
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Hi,

Have you some new from this incredible(i hope) lens?
When pentax announce it? What price?
I hope it isn't more expensive from 800€...
01-06-2011, 05:21 PM   #96
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QuoteOriginally posted by dankoBanana Quote
how about weight? the DA is lighter
I am a big proponent of small and light gear. But even I have never found a photographic situation when a 130g difference mattered.
01-06-2011, 09:43 PM   #97
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I think My Sigma 10-20 and Pentax 18-135 WR are just perfect for my walk around, I also carry a Tamron 1.4 AF TC for a little nudge.
01-06-2011, 11:05 PM   #98
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QuoteOriginally posted by rparmar Quote
If you look at it, APS-C lenses are not significantly smaller than their full-frame equivalents. For whatever reasons, it is mostly about how the lens is designed and not the circle it produces. There were full-frame pancakes almost as small as the DA Limiteds. And the FA 77 is only a hair longer than the DA 70 when you include the hood.
More relevant examples:

Pentax DA 12-24/4: 430g, 83.5 x 87.5mm, 77mm front element
Sigma 12-24/4.5-5.6: 600g, 87.5 x102.5 mm, 82mm front element

It's not everything, but it's not nothing either. What would it have looked like if Sigma had made it f/4?

Pentax DA 16-45/4: 365g, 72x92mm, 67mm filter
Canon 17-40/4 L: 475g, 84x97mm, 77mm filter
Nikkor 16-35/4: 680g, 82.5x125mm, 77mm filter

Pentax DA 14/2.8: 420g, 84x69mm, 77mm filter
Nikkor 14/2.8: 670g, 87x87mm

I realize this isn't exactly apples-to-apples since Sigma and Nikon tend not to make compactness as high-priority as Pentax appears to.

And in these cases, the Pentax APS-C circle covering DA lenses are actually faster and/or offer longer focal length ranges than the full-frame lenses of similar specs.

01-06-2011, 11:58 PM   #99
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QuoteOriginally posted by AndrewG NY Quote
More relevant examples:

Pentax DA 12-24/4: 430g, 83.5 x 87.5mm, 77mm front element
Sigma 12-24/4.5-5.6: 600g, 87.5 x102.5 mm, 82mm front element

It's not everything, but it's not nothing either. What would it have looked like if Sigma had made it f/4?
7.58 kilograms, 152mm filter size, and with even worse IQ. (if that's possible?)

Plus, 3 out of every 2 samples would focus 0.5 metres behind the photographer.


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01-07-2011, 01:55 AM   #100
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QuoteOriginally posted by rparmar Quote
If you look at it, APS-C lenses are not significantly smaller than their full-frame equivalents. For whatever reasons, it is mostly about how the lens is designed and not the circle it produces. There were full-frame pancakes almost as small as the DA Limiteds. And the FA 77 is only a hair longer than the DA 70 when you include the hood.
It's mainly because the registration (flange distance) of APS-C bodies and APS-C-only lenses is identical to the one of 24X36 bodies and lenses for compatibility reasons.

It could be shorter since the mirror is smaller and it would have been if designed from scratch but the first (APS-C) digital SLRs were meant to be compatible with the huge existing inventory of FF lenses from the film era.
01-10-2011, 04:08 AM   #101
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QuoteOriginally posted by Cambo Quote
about this...



Holding out for the 2.8 'Pro' version...



Cameron
Didn't Zeiss design that for an Arab sheikh or prince or someone like that and he mounted it on a jeep.

Anyway its clear we need to find an Arab sheikh to want more pentax lenses ;-)
01-10-2011, 08:03 PM   #102
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QuoteOriginally posted by AndrewG NY Quote
More relevant examples:

Pentax DA 12-24/4: 430g, 83.5 x 87.5mm, 77mm front element
Sigma 12-24/4.5-5.6: 600g, 87.5 x102.5 mm, 82mm front element

It's not everything, but it's not nothing either. What would it have looked like if Sigma had made it f/4?
Sigma always make large lenses, even simple things like 28mm and 50mm. It's one of the reasons I don't much fancy them.
01-13-2011, 04:39 PM   #103
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I'm guessing it's not a DA* with that aperture setup. Anyways, it might be decent for nature photography.
01-13-2011, 05:23 PM   #104
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QuoteOriginally posted by sjwaldron Quote
I'm guessing it's not a DA* with that aperture setup. Anyways, it might be decent for nature photography.
i wouldn't rule it out
01-14-2011, 12:21 AM   #105
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It is almost constant Aperture so I'd say it is a middle range lens as are 16-45 and 17-70.
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