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04-06-2008, 06:07 AM   #1
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18-55 vs Sigma 17-70

I put both of these lenses to a rather unscientific test. I shot both at f/4, 1/50 sec., ISO 400.
Personally, I don't see a whole lot of difference between either one of them. What do you think?

The 18-55:


The 17-70:


Thanks!
Heather

04-06-2008, 07:31 AM   #2
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They are hard to tell many differences , maybe a 100% crop or large prints , but as you mentioned an unscientific test. There is a tool called Exposure plot ( I think Lowell pointed it out to me) that does some analysis on your pictures(reading EXIF data) I ran it on about 6k photos and learned I take over 50% of my shots between 17 - 70 so for me that would be added into the equation. The kit lens is a very good lens for the price . There are a few good bargains out there (people rave about the Tamrom 70-300 Macro for about $200.00). The Sigma is faster , offers more range if those are not important to you stick with the Kit lens.
04-06-2008, 07:56 AM   #3
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No pictures?
04-06-2008, 08:01 AM   #4
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Not seeing anything here either.....

04-06-2008, 08:02 AM   #5
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You are right there is very little difference. The only difference I can see is in the colour rendering. The red plant in the background and the round ball seem to have a bit more saturated but this could also be because the Siggy seems to be "over-exposing" compared to the DA. It gives a much airier and, IMHO, nicer image.

Thanks
04-06-2008, 08:04 AM   #6
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Picture links, http://i.pbase.com/g3/36/816636/2/95212662.pyiR34e1.jpg (DA) and http://i.pbase.com/g3/36/816636/2/95212645.Y9GdisFE.jpg (Siggy).
For those that can't seem to see them...

Thanks
04-06-2008, 08:06 AM   #7
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Something seems to be up with pbase -
Forbidden

You don't have permission to access /g3/36/816636/2/95212662.pyiR34e1.jpg on this server.
Apache/2.0.58 (Unix) Server at i.pbase.com Port 80
04-06-2008, 08:21 AM   #8
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I had to get the urls' (right click the 'x' , properties) fire up another IE tab , display them then they appeared for me by comming back to original tab right clicking and then choose show pictures that worked for me. YMMV

04-06-2008, 08:29 AM   #9
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Yep, the URLS are correct, just the link is mucked up somehow....
04-06-2008, 08:53 AM   #10
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I tested both lenses a few days ago, Sigma 17-70mm outperforms DA 18-55mm easily.
Both lenses do not suffer from BF/FF issue, i tested both before.
The test was done using tripod, SR off, 2s delay, using K100D.

Sigma 17-70mm DC Macro VS DA 18-55mm

kyrios
04-07-2008, 02:04 AM   #11
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after looking at link provided by kyrios, I don't think we can argue much in favour of DA18-55...
04-07-2008, 12:22 PM   #12
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If you want to view any difference and compare them :

Pentax SMC-DA 18-55mm f/3.5-5.6 AL - Review / Test Report

and


Sigma AF 17-70mm f/2.8-4.5 DC (Pentax K) - Review / Test Report

I think is very useful,
Alex

Last edited by alex1962; 04-13-2008 at 10:30 AM.
11-05-2009, 07:29 AM   #13
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Mikhail, never got your pics to open

kyrios, yours don't open as well any more, it says photobucket account inactive.

alex1962, I've been looking at the reports but the way I read it they are very comparable in the measurable tests such as sharpness and distortion. What am I missing?
11-05-2009, 08:28 AM   #14
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QuoteOriginally posted by juu Quote

alex1962, I've been looking at the reports but the way I read it they are very comparable in the measurable tests such as sharpness and distortion. What am I missing?
juu - I have both and I am a fan of the kit lens, which is light and nifty and works well. But the Sigma (if you get a good one, so make sure you test it carefully) is better particularly in the peripheral areas of the shot. Mine is anyway. The first two examples I had weren't. And of course it is faster and has a more flexible range. It is also larger, heavier and (for anyone it's pointed at) scarier.

It's a trade-off.

Tim
11-07-2009, 02:00 PM   #15
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QuoteOriginally posted by timo Quote
make sure you test it carefully
That's the part that scares me in buying lenses. I don't think I'm qualified to test them really, and I'd be ordering online so I'd have to try convincing the online shop to exchange it.
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