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11-22-2006, 09:20 PM   #1
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Da 18-55, 55-200 vs Sigma 18-125

Almost ready to buy the K100 but was wondering what would be the best starter lens choice. How is the Sigma 18-125 as compared with the tow lens kit (18-55, 55-200) I mostly do landscape work and some portraiture.

From reviews I read that the 18-55 has significant vignetting. How is the sigma in that regard? Any other issues with these lenses?

11-22-2006, 09:24 PM   #2
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Check out this thread for some kit lens shots. Can't help you any more other than to say the 18-55 does have the vignetting, but whether it's "significant" or not obviously varies from person to person. I don't mind it.
11-22-2006, 11:32 PM   #3
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I have the Sigma 18-55, the Pentax 18-50 and the Pentax 16-45, there is not a lot between them on my DS. If I can get one I am getting an 18-125 with my K10D, they perform quite well on other cameras and should do well on the K100D as well.
11-26-2006, 01:37 PM   #4
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I have the 18-125 and the 50-200, but not the kit lens, for my K100D. The 50-200 is slightly sharper than the 18-125, especially above 100mm. But the 50-200 isn't wide enough to be conveniently used as a walkabout lens.

In comparison pictures from other forums, I haven't seen much difference between the 18-125 and the 18-55 at the wide end.

As between the 18-125 alone and the 18-55 & 50-200 combined, I would choose the latter; zoom above 125mm is useful. If you can afford the expense (I bought by 18-125 slightly used on eBay for a good price), the 18-125/50-200 combo is equivalent to the kit lens/50-200 combo in image quality, and the 18-125 is a much better walkabout lens than the 18-55.

12-08-2006, 02:45 PM   #5
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Hi,

For landscapes I use either my 28-70mm or my 28-200mm. I use my 28-70mm for potraits. The 18-125mm would be a good walk around lens as would the 18-55mm.

Rudy
12-08-2006, 03:03 PM   #6
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QuoteOriginally posted by arbutusq Quote
Almost ready to buy the K100 but was wondering what would be the best starter lens choice. How is the Sigma 18-125 as compared with the tow lens kit (18-55, 55-200) I mostly do landscape work and some portraiture.

From reviews I read that the 18-55 has significant vignetting. How is the sigma in that regard? Any other issues with these lenses?
I purchased the 18-55 a few days ago for the sake of my collection, but I did take some sample shots. There was a bit of vignetting, and the lens itself feels light, cheap, and plasticky. I don't think I'll ever be using it in the field

The DA 50-200 is a solid lens with great focusing speed and sharpness. Plus, it's compact, so no complaints there.

The lens I use for everyday snapshots is still the FA 28-105 [Power Zoom]. It's better than the 18-55 in all aspects, and the only lens that could replace it IMO would be one of the DA*'s.

Adam
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12-08-2006, 04:50 PM   #7
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QuoteOriginally posted by Mo Quote
The lens I use for everyday snapshots is still the FA 28-105 [Power Zoom]. It's better than the 18-55 in all aspects, and the only lens that could replace it IMO would be one of the DA*'s.
Except the one spec that really matters: Field of view! (And the kit lens has the marvelous focus clutch, which I really like.)

I think you should give the kit lens a chance!
12-08-2006, 05:08 PM   #8
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QuoteOriginally posted by jbarnhart Quote
Except the one spec that really matters: Field of view! (And the kit lens has the marvelous focus clutch, which I really like.)

I think you should give the kit lens a chance!
The FA is much sharper at 28mm than the kit lens is at 18mm, so there's nothing to compare, frankly. Plus, it works on all the film bodies, too!

I'll give the kit lens one more chance, but the overall casing quality still diappoints me. I've seen some good shots taken with it, but lighting conditions aren't always ideal, are they?


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12-08-2006, 11:14 PM   #9
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Whats your 28-105 PZ like at the 105 end?? mine was good at 28mm but very soft at 105mm... I replaced it with the 3.2-4.5 version, much better at the long end but slightly softer at 28mm..

Last edited by joele; 12-08-2006 at 11:23 PM.
01-02-2007, 12:16 PM   #10
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I was about to start a new thread about this, actually.

The 28-105 has been my standard lens since I got it. Not soft at all at the long end for me, and now that I have the K10D, the PZ function comes in handy, too!

All of the photos in these galleries were taken with it:
Motec Photo Gallery
Motec Photo Gallery

How is the 3.2-4.5 version? I've been hearing that the elements come loose over time, but those must have been rumors...

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01-02-2007, 12:56 PM   #11
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QuoteOriginally posted by Mo Quote
How is the (FA 28 - 105) 3.2-4.5 version? I've been hearing that the elements come loose over time, but those must have been rumors...
I'd like to know also! How is the build qualit copare to the kit lens? I'm going to check it out at Adorama when they have it back in stock.

I've seen the kit lens - FA18-55mm, and even if it takes nice pictures it is not something that I would use. Too light and too much plastic.
01-02-2007, 05:10 PM   #12
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Check some pro reviews...

Definetly better than 18-200 superzooms:

Sigma AF 18-125mm f/3.5-5.6 DC - Photozone Quick Test Report / Review
Sigma 18-125mm f/3.5-5.6 DC review
01-02-2007, 06:03 PM   #13
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I have the 18-125 on both my DS and K10D, it is avery good lens and ideal walkabout, its light small and sharp and an ideal starter lens, it cost me $AU70 more to get the 18-125 with my K10D in lieu of the 18-55 kit lens but well worth it.
01-02-2007, 06:08 PM   #14
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Regarding the original topic I would rate the 18-125 a step above the 18-200 and then the 17-70 another step (or two) above that.. The 18-55 is definately not as good as the 17-70 either (or the 18-125 for that matter in some respects).. I have also owned (I get a lot of lenses through work) the DA 16-45 and believe at least in colour/contrast it is slightly above the Sigma 17-70 and has the advantage of quick shift focusing and a little less distortion.. But the 17-70 is slightly brighter and has more reach...

Personally if you mainly do landscape and portrate I would go for the Sigma 17-70 (Pentax is releasing their own but still no date on that one)...



Off topic As to the 28-105 3.2-4.5, when I compared it to my PZ 28-105 I found it ever so slightly softer at 28mm but better at the mid to long end.. It is also a fair bit smaller ad lighter than its powerzoom cousin.. Fantastic colour, my only real complaint is the AF hunts a little at the long end esp on the DS (not as much on the K100d/K10d, but still a little at times)..

I am actually thinking of selling mine not because of any problem, I just don't use it much, and my girlfriend prefers the feel of the Pentax-A 35-105 3.5
08-07-2007, 04:53 PM   #15
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QuoteOriginally posted by arbutusq Quote
Almost ready to buy the K100 but was wondering what would be the best starter lens choice. How is the Sigma 18-125 as compared with the tow lens kit (18-55, 55-200) I mostly do landscape work and some portraiture.
Well, the "no brainer" is the DA 50-200mm f/4.0-5.6.
Why?
Because it's almost $100 after the "double rebate" when you buy it with the K100D (or K10D).
You can always eBay it later.

So then you have to ask yourself what "wide" lens you want?
In addition to the sub-$100 DA 18-55mm f/3.5-5.6 "kit" or the $250 Sigma DC 18-125 f/3.5-5.6 or even the $350 Sigma DC 17-70 f/2.8-4.5, don't forget about the ...
- $250 (after $100 rebate) DA 16-45mm f/4.0
- $400 Sigma DC EX 18-50mm f/2.8

The former is an excellent, good and wider (24.5mm equivalent, 83 degree FOV) replacement for the kit (27.5mm equivalent, 76 degree FOV) lens.
The latter is an outstanding replacement for the "kit" lens too, with a constant f/2.8 that many like.
Don't confuse it with the "cheaper" Sigma DC (non-EX) 18-50mm f/3.2-4.5, not the same -- get the "EX" version at f/2.8.

I only wanted to spend $250 and got the wider DA 16-45mm f/4.0 to replace my "kit" lens, but that's me.
I also have the AF 28-105mm f/4.0-5.6 as a general "walkabout lens" for when I want more reach.
At some point in a year or two, I'll hand my K100D to my wife, and I'm not sure if she'll keep the AF 28-105mm f/4.0-5.6 (or if I acquire the f/3.2-4.5 AL version), or if I'll break down and buy the $250 Sigma 18-125mm f/3.5-5.6 so she has a 7x zoom.
I might end up doing the latter.

Last edited by bjsmith; 08-07-2007 at 04:59 PM.
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