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06-20-2007, 12:27 AM   #1
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Sigma 18-50mm f/2.8 EX DC Macro (3 Imgs)

Ordered from Adorama and got it in today. Took a quick few photos at work to test it out, nothing interesting, but first impressions of image quality look good. Nice and sharp and love the bokeh at f/2.8.







Can't wait to test it out more when time permits

06-20-2007, 02:10 AM   #2
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Looks pretty good. I'd love to see it compared with the Sigma 1770 though

Thanks for sharing.
06-20-2007, 02:27 AM   #3
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The Sigma 17-70 and Tamron 28-75 were my other choices. But I wanted a constant f/2.8 ruling out the 17-70 and I needed a wide-angle so that ruled out the Tamron. Gave this one a shot and looks like I'll be happy with the lens.
06-20-2007, 12:03 PM   #4
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QuoteOriginally posted by Toshi Quote
The Sigma 17-70 and Tamron 28-75 were my other choices. But I wanted a constant f/2.8 ruling out the 17-70 and I needed a wide-angle so that ruled out the Tamron. Gave this one a shot and looks like I'll be happy with the lens.

Good taste Toshi, I bought this lens 2 months ago, no regret, you are right about the constant f/2.8, for indoor use, the 18-50 Macro f/2.8 is the king compare to the other 2 lenses mentioned here. Sigma gives us f/2.8 all the way with the bonus Macro for under $450.00, I vote it for the lens of the year 2007 as far as quality and money can buy. For out door use, I think the 17-70 has more advantage, it gain 20 mm tele, the Tamron 28-75 ?? Ummm, for full frame may be, for digital 1.5 crop, it is a funny size lens, not wide enough. Again, congrat to your new toy or new tool. I hope you enjoy it as much as I do.

06-20-2007, 11:48 PM   #5
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Thanks BigMac. Did a few more outdoor shots today after work. It was pretty overcast and lighting was bad, but the lens still performed superbly. Definitely happy I sold my other zooms for this one
06-21-2007, 12:33 PM   #6
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Great shots! Is indoor focusing fast or does the lens hunt? How's CA and distortion at 18mm?
06-21-2007, 11:12 PM   #7
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QuoteOriginally posted by frank Quote
Looks pretty good. I'd love to see it compared with the Sigma 1770 though

Thanks for sharing.
Hi Frank,

I checked the Nikon versions of both the 18-50/2.8 Macro and the 17-70/2.8-4.5 side by site, comparing the MTF charts from photozone.de, they seem fairly similar with the 18-50/2.8 having a bit of an edge in terms of resolution, also has better border performance. All-in-all, I think the only real distinguisher between the two is the max-constant aperture of the 18-50.

I've been interested in both these lenses for some time, but first I need to get a DA16-50/2.8.

Cheers,
-Asad
06-22-2007, 12:30 AM   #8
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QuoteOriginally posted by neighhoma Quote
Great shots! Is indoor focusing fast or does the lens hunt? How's CA and distortion at 18mm?
I did do a bit of indoor low light shooting and it was pretty fast. Focus was accurate and rarely hunts. This was in a unlit room with only my computer monitor and an aquarium light on. I'm sure it performs better under 'normal' low light conditions.

So far, no CA at all, at least nothing I could see. Distortion at 18mm was barely noticeable, but it kind of depends on the subject. There is a bit of vignetting when shooting wide open, again depending on the subject.



Another sample shot taken the other day.



Resize only, 50mm, 1/50 @ f/13, Handheld.

06-22-2007, 12:33 AM   #9
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QuoteOriginally posted by Asad_Masede Quote
Hi Frank,

I checked the Nikon versions of both the 18-50/2.8 Macro and the 17-70/2.8-4.5 side by site, comparing the MTF charts from photozone.de, they seem fairly similar with the 18-50/2.8 having a bit of an edge in terms of resolution, also has better border performance. All-in-all, I think the only real distinguisher between the two is the max-constant aperture of the 18-50.

I've been interested in both these lenses for some time, but first I need to get a DA16-50/2.8.

Cheers,
-Asad
Thanks Asad Looks like the 1770 is still quite comparable even with the newer faster EX 2.8 lens

I've got this 1770 lens for about 4 months now, it's one of the better zoom lenses I've ever used. I'd rate it higher than the Pentax 24-90 even within the same focal range

Of course we all are waiting for the DA* zoomies, just don't know when they'd really come out

Cheers!
06-22-2007, 12:35 AM   #10
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QuoteOriginally posted by Toshi Quote


Another sample shot taken the other day.

http://newton-i.usefilm.com/images/5/1/6/2/5162/1321629-large.jpg

Resize only, 50mm, 1/50 @ f/13, Handheld.
That's a beautiful photo. Very pretty.
06-22-2007, 12:55 AM   #11
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QuoteOriginally posted by frank Quote
That's a beautiful photo. Very pretty.
Thanks so much Frank. I live right by the beach and this is usually my test area when I get a new lens Luckily the fog wasn't too thick and I was able to capture some nice light in the distance.
06-23-2007, 04:01 AM   #12
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Hi,

Toshi, have you done any checking to see if the 18mm setting is truly 18mm? There were reports of the older non-'Macro' version of this lens being a 19mm actually.

Thanks.
06-23-2007, 08:19 AM   #13
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QuoteOriginally posted by Kev Teoh Quote
Hi,

Toshi, have you done any checking to see if the 18mm setting is truly 18mm? There were reports of the older non-'Macro' version of this lens being a 19mm actually.

Thanks.
Hi Kev,

How would I go about checking to see if it's truly at 18mm? According to EXIF information, it does state 18mm. Is there another way to check; I'd be glad to confirm it for you.
06-24-2007, 02:49 AM   #14
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QuoteOriginally posted by Toshi Quote
Hi Kev,

How would I go about checking to see if it's truly at 18mm? According to EXIF information, it does state 18mm. Is there another way to check; I'd be glad to confirm it for you.
I was thinking, maybe check the apparent wideness (field of view) against another lens at 18mm (e.g. kit lens, or similar). If it's too much hassle or you don't have similar lenses, it's okay - I'm close to going for this lens either way. Thanks.
06-24-2007, 05:45 AM   #15
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QuoteOriginally posted by Kev Teoh Quote
I was thinking, maybe check the apparent wideness (field of view) against another lens at 18mm (e.g. kit lens, or similar). If it's too much hassle or you don't have similar lenses, it's okay - I'm close to going for this lens either way. Thanks.
Unfortunately, I sold my kit lens to upgrade to this one, sorry.
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