Sigma Lens

Discussion in 'Photography Beginners' Forum' started by ketan, Jul 22, 2007.

  1. ketan

    ketan TPF Noob!

    Joined:
    Jul 16, 2007
    Messages:
    252
    Likes Received:
    0
    Can others edit my Photos:
    Photos NOT OK to edit
    Hi,
    I am planning to buy a Sigma 28-300 "DG Macro" lens for may 30D.
    Can someone tell me that what does DG Macro means ? Does it have functions of macro lens ?
    Thanks
    ketan
     
  2. Garbz

    Garbz No longer a newbie, moving up!

    Joined:
    Oct 26, 2003
    Messages:
    9,713
    Likes Received:
    203
    Location:
    Brisbane, Australia
    Can others edit my Photos:
    Photos NOT OK to edit
    It comes close. It has a 1:3 Reproduction ratio very characteristic of these zooming "macro" lenses. The image is only 1/3rd as close as what some would call a true macro lens which has a 1:1 magnification, is often optimised for this near focus distance, and usual a prime (fixed focus) lens.
     
  3. britonk

    britonk TPF Noob!

    Joined:
    Nov 21, 2006
    Messages:
    136
    Likes Received:
    0
    Location:
    Stoke on Trent, Staffordshire, UK
    Can others edit my Photos:
    Photos OK to edit
    DG means that the lens is suitable for use with full frame cameras (or 35mm film cameras). The sensor in most digital SLRs is smaller than the space usually used on a role of film and some lenses take advantage of this but this means you can't use them on "full frame cameras".
     
  4. DSLR noob

    DSLR noob TPF Noob!

    Joined:
    Feb 7, 2007
    Messages:
    1,527
    Likes Received:
    7
    Location:
    Atlanta, GA
    Can others edit my Photos:
    Photos OK to edit
    a 28-300 does not sounds like very good image quality to me.
     
  5. ANDS!

    ANDS! No longer a newbie, moving up!

    Joined:
    Nov 14, 2006
    Messages:
    2,178
    Likes Received:
    3
    Location:
    Downtown
    Can others edit my Photos:
    Photos OK to edit
  6. keith204

    keith204 No longer a newbie, moving up!

    Joined:
    May 20, 2007
    Messages:
    1,643
    Likes Received:
    2
    Location:
    Bolivar, MO
    Can others edit my Photos:
    Photos OK to edit
    A guy at work has both the 28-300 and the 28-200 (maybe 18-200) anyway, both sigmas. He said the 28-300 is awful compared to the other one. Terrible autofocusing, terrible quality. Image quality is suppossed to be OK, but the autofocus probably won't last long. His did, but has problems. Google that lens, and you'll find all kinds of people complaining that the autofocus goes out.

    However, I think you can get a 6 year warranty with that lens (?). In this case, who cares how much it breaks? worst case, you'll be stuck without a lens for a couple months. (something to consider)

    What's your budget?

    Anyway, to sum it up... if you don't need the 300, you might want to look into a 18-200 or 28-200. I own 2 very nice Sigma lenses, and am impressed...but can't necessarily say the 28-300 will have the same build quality.
     
  7. DSLR noob

    DSLR noob TPF Noob!

    Joined:
    Feb 7, 2007
    Messages:
    1,527
    Likes Received:
    7
    Location:
    Atlanta, GA
    Can others edit my Photos:
    Photos OK to edit
    A canon EOS camera can autofocus with a lens that has a max aperture of 5.6 or less(1-series, up to f/8), in the telephoto end of this lens it is a f/6.3, the autofocus doesn't "go out" it isn't functional because it isn't designed to be. I wouldn't get a lens this consumer level, quality, function, and build would be horrible.
     
  8. bjrouse

    bjrouse TPF Noob!

    Joined:
    Apr 20, 2007
    Messages:
    36
    Likes Received:
    0
    Location:
    Brisbane Australia
    Can others edit my Photos:
    Photos OK to edit
    You couldn't give me a Sigma 28-300.
    Save your money, wait and buy a decent zoom lens
     
  9. EOS_JD

    EOS_JD TPF Noob!

    Joined:
    Feb 15, 2007
    Messages:
    1,698
    Likes Received:
    0
    Can others edit my Photos:
    Photos OK to edit
    The AF will still work because it goes with ethe lens' maximum aperture (focal length does not come into it for AF). The max aperture of f3.5 is therefore greater than the 5.6 and AF will work......however

    The main thing is that at f6.3 the AF will not be great because the lens needs a lot of light to function properly. Most consumer zooms struggle in lower light. f6.3 is very slow and to be honest you would certainly be better with a faster lens.
     
  10. EOS_JD

    EOS_JD TPF Noob!

    Joined:
    Feb 15, 2007
    Messages:
    1,698
    Likes Received:
    0
    Can others edit my Photos:
    Photos OK to edit
    It's not that the AF will break or go out, it's just a function of focusing with a lens with a narrow f6.3 apperture.
     
  11. ketan

    ketan TPF Noob!

    Joined:
    Jul 16, 2007
    Messages:
    252
    Likes Received:
    0
    Can others edit my Photos:
    Photos NOT OK to edit
    Thanks Guys, I have almost made up my mind to stick to 28-200.
    Now I have one Tamron 28-200 AF Aspherical XR (IF) AO3 that I was using with EOS300 (Film camera).
    Should I mount that on my 30D or I should go for 28-200 Sigma 'meant' for digital camera ?:D
     
  12. EOS_JD

    EOS_JD TPF Noob!

    Joined:
    Feb 15, 2007
    Messages:
    1,698
    Likes Received:
    0
    Can others edit my Photos:
    Photos OK to edit
    Use the one you have. You'll find them both similar. Save up and buy a faster lens that you'll be able to use in more situations.....
     

Share This Page

Search tags for this page

cant get a clear photo with sigma lens