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06-21-2013, 02:24 AM   #151
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QuoteOriginally posted by Postumus Quote
Well if Sigma can fit all of that in such an economy priced lens I'll be impressed
No expecting much....everyone is hyped on price and speed.....
Get real people......IQ will suffer....forget the daydream specs if your images are crap
I forgot why I gave my Sigma's away.........?
Ohh ...... now I remember!....IQ
Sigma A 18-35 mm f/1.8 DC HSM review - Introduction - Lenstip.com

06-21-2013, 03:11 AM   #152
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Seriously, I find the testimonies of some people here much, much more credible than from any "professional" reviews.

Thus, I'll probably decide when our resident reviewers (read: early adopters) here have finalized and drawn their verdicts.
06-21-2013, 03:29 AM   #153
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QuoteOriginally posted by Postumus Quote
Well if Sigma can fit all of that in such an economy priced lens I'll be impressed
No expecting much....everyone is hyped on price and speed.....
Get real people......IQ will suffer....forget the daydream specs if your images are crap
I forgot why I gave my Sigma's away.........?
Ohh ...... now I remember!....IQ
A few years ago I would have agreed with you, and my experience with a few consumer zooms and a not so great pre-digital copy of their EX70-200/2.8 confirmed that. I actually swore never to buy Sigma again!!

Since then, after research and seeing images made by others, I relented and purchased both a EX180/3.5 macro and the 8-16 UWA zoom. Both these lenses are excellent and frequent residents in my camera bag. They restored Sigma's reputation for me. This more recent experience means the 18-35/1.8 *is* a lens I'll will want to see perform on a Pentax body. Of course I'll only decide whether a purchase is in order after seeing and reading feedback from other Pentaxians. I will always remain cautious when Sigma is concerned...

Wim
06-21-2013, 04:32 AM   #154
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after scrutinising some image samples taken at f/1.8~f/5.6 range I can say the FA31 can rest easy.

06-21-2013, 01:38 PM   #155
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How does this help me over my 50-135mm?

Having never used full frame or film, I'm struggling to understand how 28-50mm f2.8 is helpful vs my existing lens collection...

Anyone able to enlighten me?
06-21-2013, 07:44 PM   #156
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QuoteOriginally posted by Pheo Quote
How does this help me over my 50-135mm? Having never used full frame or film, I'm struggling to understand how 28-50mm f2.8 is helpful vs my existing lens collection...
if you don't see a need to own it, don't get it.

...yes it really is that simple.
06-23-2013, 11:57 AM   #157
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QuoteOriginally posted by Digitalis Quote
if you don't see a need to own it, don't get it.

...yes it really is that simple.
I was more wondering if someone can enlighten me as to the differences between a 17-50mm f2.8 on APSC vs a 24-70mm f2.8 on full frame

Got a wedding to shoot later in the year an I hear lots of people going on about this lens being ideal for that. So I could sell my Tamron 17-50 and Sigma 30mm and replace with this lens potentially, but was looking for someone with more experience with this lens set.
06-23-2013, 05:25 PM   #158
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If you keep the same aperture f-number, the FF lens will have about 50% better resolution and a little less than half the noise. The DOF will also be much smaller.

If you keep the same DOF, you will have about 50% better resolution with the same noise.

06-24-2013, 04:47 AM   #159
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QuoteOriginally posted by Digitalis Quote
after scrutinising some image samples taken at f/1.8~f/5.6 range I can say the FA31 can rest easy.
What exactly do you have in mind?

That Sigma IQ is so great that FA31 can rest easy on a shelf.

Or

That Sigma IQ does not match the FA31, so FA can rest easy on a camera body.

06-24-2013, 06:26 AM   #160
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QuoteOriginally posted by Digitalis Quote
after scrutinising some image samples taken at f/1.8~f/5.6 range I can say the FA31 can rest easy.

It would be quite weird if a prosumer zoom matched one the finest prime lenses. But thanks for the comparison anyway
06-24-2013, 10:47 AM   #161
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QuoteOriginally posted by Apapukas Quote
That Sigma IQ does not match the FA31, so FA can rest easy on a camera body.
That was my intended meaning...I mean, really? who buys a $1,400 lens only to have it gather dust - people who fit that description are utterly unworthy of owning such a lens.
06-24-2013, 10:56 AM   #162
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QuoteOriginally posted by Digitalis Quote
I mean, really? who buys a $1,400 lens only to have it gather dust
Collectors.

They're out there,
and they drive up the prices users have to pay.
06-24-2013, 11:39 AM   #163
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QuoteOriginally posted by lytrytyr Quote
Collectors.

They're out there,
and they drive up the prices users have to pay.
Luckily for us, most of them have their eyes on things that say "Leica" on them, not the humble Pentax.
06-24-2013, 01:25 PM   #164
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QuoteOriginally posted by Edgar_in_Indy Quote
Now, I'm thinking that in a lot of cases this 18-35mm 1.8 can take the place of both my 10-20mm and my 30mm 1.4, as long as I don't need an extreme wide angle. So I could see myself frequently going with the 18-35mm 1.8, along with either the 85mm 1.4 or the 50-150mm 2.8 depending on what I'm doing. So with just two lenses I've got a wide angle, a fast standard, and a fast telephoto.
Yes, that would be quite a killer kit. All Sigma lenses! Fast and quiet focusing, great in low light, from 18-150mm.

QuoteOriginally posted by EarlVonTapia Quote
- This lens is quite heavy. It's more or less comparable to the weight of the DA*50-135. Carrying one around for a while is already tiring enough. Carrying two? I'm not so keen on that. It could work if you're in a setting where you can set a camera/lens down for a while, but as a walkaround say on vacation or a casual setting, I don't think so. - Also, people are paranoid enough these days about big lenses on the street, and the trend seems to be for pocketable discrete cameras for that kind of thing (Fuji, Sony, Ricoh GR). As for those "everyday moments", well I got a Q so I didn't have to lug my K30 to dinners and whatnot. I think a big lens like this could be kind of obnoxious for that sort of thing. - It's range is small. I find myself shooting at either the wide end (17-20mm) or 50mm. Only sometimes in between. While the difference between 17mm and 18mm is negligible, I think I'll miss that extra reach at the long end quite a bit. The f1.8 is nice though, and at that price it's absolutely amazing. It certainly makes buying a DA*16-50 at brand new prices seem kind of foolish. But I think the Sigma 18-35 will be a specialist lens for more creative purposes or for use in a more controlled environment (wedding or studio perhaps?). I don't think it will outright replace general zooms like the 17-50's or the 17-70's.
All very valid points and will make me seriously wonder whether it's worth getting this over, say, a Sigma 17-70 contemporary, that is far smaller, lighter, and offers more versatile zoom range. But of course, is not f/1.8 constant! I have a Sigma 50-150 that I love but which is quite bulky/heavy, and I often don't take it on vacations; instead, I take the DA 70 or D FA 100WR, or DA 55-300, because those are all so much easier to carry and travel with. I'm worried if I got the new 18-35, I might similarly feel like not packing it on trips, and instead use more versatile and practical options like a 18-135, or the DA limited primes.

Still, between the 18-35 range, I have no prime lenses that are faster than f/2, so this zoom would be a big upgrade. And I really enjoy shooting in the 21-35 range while indoors, especially at 24mm and 28mm.

QuoteOriginally posted by Rmel26 Quote
Me think, me will sell Tamron 28-75, Sigma 17-70 and Sigma 28 F1.8. Get this lens and attach it to my K5ii. Then bring along the K01 with the DA 70. Question to the board: TO PREORDER OR WAIT.
If you have the money and think this can replace several of your existing lenses, you might as well preorder and give it a try! The early reviews have been outstanding. If you sold all three of these lenses, though, wouldn't you miss the 35-70 range? Or maybe buy a cheap F 35-70 zoom to cover it?
06-24-2013, 07:16 PM   #165
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QuoteOriginally posted by lytrytyr Quote
Collectors. They're out there, and they drive up the prices users have to pay.
I think all things Zeiss and Leica are of more interest to collectors, several of the lens collectors I know have an almost fetishistic view of Leica cameras. Frankly, I find it to be a bit disturbing. I really don't consider cameras to be objects d'art....they are tools, nothing more.
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