Sigma 18-50 f/2.8 HSM. Any advice regarding this lens?

Discussion in 'Digital Photography' started by 66217, Dec 1, 2008.

  1. 66217 Guest

    Joined:
    Jan 30, 2006
    #1
    I had posted a couple of months ago I was intending to buy a 17-55mm f/2.8 Nikkor this christmas. But I never saved enough money (and I really think it is just too much) and I'm currently debating which lens to get. I just don't like my 18-55 anymore.

    So my options are three (if you have any other suggestions do say them:))
    - Keep the Nikkor 18-55 f/2.5-5.6 and get the new 50mm f/1.4
    - Buy the Sigma 18-50 f/2.8
    - Buy a Nikkor 16-85 f/3.5-5.6

    I've read the Sigma is soft at f/2.8, and also the possible problems they might come with (front focusing, etc).

    I have a Nikon D40x.
     
  2. MaddMacs macrumors 6502

    Joined:
    Jan 16, 2008
    Location:
    Flagstaff, Az
    #2
    I have the Pentax mount of this lens 18-50mm EX DC 2.8 and am still practicing with it... so far its worlds better than the kit lens. I really like the wide angle, and the moderate zoom (27-75mm on a crop sensor camera). It is a great walk around lens, and not bad in low light. I still want the Pentax 50mm 1.4 though... for the price... they are both good lenses but stopped down, not perfect... for the price... Check out my flickr for examples.
     
  3. 66217 thread starter Guest

    Joined:
    Jan 30, 2006
    #3
    Nice photos. Was this one taken with the Sigma?

    It has a nice bokeh, which is something I miss from my kit lens. Also, you say it is not that sharp, but do you find that photos at f/2.8 are acceptable?

    Thanks. =)
     
  4. MaddMacs macrumors 6502

    Joined:
    Jan 16, 2008
    Location:
    Flagstaff, Az
    #4
    Yes it was. Now, don't get me wrong, it's a good lens, but there is always something better....and more expensive. I thought at around $300 it was a good buy. The reviews say it is a little soft at 2.8 on the high and low focal lengths... but here is a high-res version so you can judge for yourself:
    [​IMG]
    Camera: Pentax K200D
    Exposure: 0.001 sec (1/1000)
    Aperture: f/2.8
    Focal Length: 50 mm
    ISO Speed: 200

    Here's another stopped up:

    [​IMG]

    Camera: Pentax K200D
    Exposure: 0.006 sec (1/180)
    Aperture: f/8
    Focal Length: 50 mm
    ISO Speed: 100
     
  5. 66217 thread starter Guest

    Joined:
    Jan 30, 2006
    #5
    Thanks for posting the photos. It's a bit soft at f/2.8, but that second photo looks sharp.

    It ¡s starting to look as a very good option to replace my 18-55. I really think that it being constant 2.8 aperture is going to be a much better option than going for a 16-85.

    Tho I'm still afraid of the problems they may have.
     
  6. yaroldb macrumors 6502

    Joined:
    Feb 21, 2007
    #6
    Roco,

    I own this lens for the Olympus 4/3rd system. I have to say it is currently my favorite lens. I heard a lot about this lens being soft wide open and also had problems at 50mm. I purchased it used for about $325 from a user on Amazon. This lens is super sharp wide open and at 50mm. I love it. I could not have asked for a better lens. I read that the problem with Sigma was quality control. There are good and bad copies of this lens. I must have gotten a good copy. This picture was taken at 2.8. It is a bit small (I do not have a higher res version here at work) but it will give you an idea of the lens. Click here

    Converted to B&W in LR.
    ISO 400
    f/2.8
    Olympus E-520.
     

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