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03-08-2010, 09:30 AM   #31
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I believe the 28mm f2 was a prediction from a magazine based on what they thought Pentax should do. I don't see any reason to think it's a serious possibility. A 30mm f1.4 is still a good bet, but dont expect it to be cheap.

03-08-2010, 10:02 AM   #32
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I agree that Pentax needs a 28mm. The Fa 31mm ltd is way too expensive for the average photographer. It is a speciality lens. A 28mm f/2.8 lens should be produced. F/2 would be better, but of course it would cost more.
03-08-2010, 12:21 PM   #33
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QuoteOriginally posted by Erik Quote
Cool, if you wanna post some I'm looking forward to that.

I found a bunch on flickr and must say this looks like a beautiful and extremely useful lens. The bokeh is sweet and you can get much thinner DoF than I had expected out of a 28mm.

Loving this. Very smooth.
Here you are, they are in my profile. Album name is obvious. No time to check for aperture settings for each but I guess you'll quickly find the f/1.8 ones
03-08-2010, 12:26 PM   #34
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QuoteOriginally posted by thibs Quote
Here you are, they are in my profile. Album name is obvious. No time to check for aperture settings for each but I guess you'll quickly find the f/1.8 ones
Thanks! Looking good.

Checking the EXIF Data, apparently this lens has the same lens ID as the "smc PENTAX-F 28mm F2.8"...

03-08-2010, 12:30 PM   #35
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QuoteOriginally posted by Erik Quote
Thanks! Looking good.

Checking the EXIF Data, apparently this lens has the same lens ID as the "smc PENTAX-F 28mm F2.8"...
Yep, I also own the Pentax-F but never used it much at all. Since I have the Sigma, I didn't used it at all.

In fact, the problem with this lens used very close and at f/1.8 is... that you really don't get much in focus, really really not much. Often had to bump ISO and close aperture (flash was out of the question).
03-08-2010, 02:16 PM   #36
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Okay, I asked these questions on the lens forum but since this is a more-active thread, perhaps someone who has used both the Sigma 28mm f/1.8 and the Sigma 30mm f/1.4 can answer these three questions:

1) Given that only the 30mm offers f/1.4, which lens is sharper at f/1.8?

2) Is the 28mm any sharper at the edges than the 30mm?

3) Does either lens do better when it comes the CA and/or flare?
03-08-2010, 06:07 PM   #37
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QuoteOriginally posted by Biro Quote
Okay, I asked these questions on the lens forum but since this is a more-active thread, perhaps someone who has used both the Sigma 28mm f/1.8 and the Sigma 30mm f/1.4 can answer these three questions:

1) Given that only the 30mm offers f/1.4, which lens is sharper at f/1.8?

2) Is the 28mm any sharper at the edges than the 30mm?

3) Does either lens do better when it comes the CA and/or flare?
I do not own the 30mm, but the general consensus seems to be that it is optimized for center sharpness. My 28mm seems sharp enough across the frame.
03-08-2010, 07:10 PM   #38
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QuoteOriginally posted by StephenMerola Quote
I do not own the 30mm, but the general consensus seems to be that it is optimized for center sharpness. My 28mm seems sharp enough across the frame.
I'm probably going to get the 30 f/1.4 at some stage as I am in the market for a super-fast standard for night street stuff. Pentax's superb 31mm f/1.8 would also fit the bill but is a bit noisy and slow to AF from some feedback I sought. The Sigma is not HSM in Pentax mount, which is very disappointing. Maybe Sigma will change that. If you check out photozone's test of the Sigma, it's very much geared for centre sharpness and to use it from f/1.4. Even stopping down won't really help the borders too much, whether that matters on a f/1.4 too much depends on what you shoot I guess.

03-08-2010, 07:28 PM   #39
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If they make one I will buy it.

If they produce a 28mm 2.0, (1.7-1.9 works too) AND they keep it reasonably priced I would purchase it in a heart beat.

My current issue with Pentax lenses though is the long minimum focusing distance. My 12-24mm is too long for a lot of effects I want, and the 50-135mm is likewise cursed.

Fast, Sharp and Cheap. (I would like all three)
03-08-2010, 09:21 PM   #40
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QuoteOriginally posted by omega leader Quote
My current issue with Pentax lenses though is the long minimum focusing distance. My 12-24mm is too long for a lot of effects I want, and the 50-135mm is likewise cursed.
ugh, I HATE the 3 foot minimum focusing distance of the 50-135mm. This lens begs to be used indoors or up close, especially with the F2.8 aperture. But 3 feet is too long.
03-09-2010, 10:43 AM   #41
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If Pentax makes something new I hope it focuses closer--doesn't need to be 1:1 macro but many of Pentax's designs are rather conservative in this aspect. The FL and max aperture of the FA31/1.8 are attractive but perhaps it could be updated with quick-shift AF, lighter/more compact/cheaper by sacrificing FF capability. I actually think Pentax needs two lenses in this range--one with 'Limited' quality, one more basic and with more entry-level-friendly pricing.
03-09-2010, 10:57 AM   #42
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IMO the Limited is perfect how it is but QuickShift.

One would add a cheap 28/30mm prime Ó la DA28/2 WR and a DA*28/1.7 or an updated FA35/2 to DA 35/2 WR + DA*28/1.8.

Well, something along those lines...
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