Macro w/ Sigma 50mm F2.8 DGMacro

Discussion in 'Beyond the Basics' started by Freedbaby, Jun 4, 2008.

  1. Freedbaby

    Freedbaby TPF Noob!

    Joined:
    Jan 12, 2008
    Messages:
    87
    Likes Received:
    0
    Location:
    Houston
    Can others edit my Photos:
    Photos OK to edit
    I just bought a Sigma 50mm F2.8mm DG Macro for taking pictures of Jewelry. Previously I was using my Tamron 17-50 F2.8 which was not a true macro lens but it was getting the job done.

    What I am noticing with the Sigma Macro is that it has Crazy shallow depth of field. I usually hand hold everything because in my office I am usually in a big hurry to send a picture of something off to a customer, but even at F11 or F13 I am still getting quite a bit of blur. I know it has nothing to do with hand holding it because I AM indeed getting a focus point that is razor sharp but not the rest of the ring.....Is this normal with a macro lens?? Focus distance it about 2-5 inches BTW

    My office camera is a Rebel XT and I have been shooting at ISO 800 125th or so at F11 or F13.......wondering if using my 40D would make a difference due to the ability to use higher ISO

    Freedbaby
     
  2. JimmyO

    JimmyO TPF Noob!

    Joined:
    Feb 3, 2008
    Messages:
    2,132
    Likes Received:
    0
    Location:
    NJ
    Can others edit my Photos:
    Photos NOT OK to edit
    Yup, macro lenses have hair thin DOF. You need a good tripod so you can use a longer shutter speed, you could also get off camera lighting (which most macro shooters use all the time for this very reason, i think)

    HTH
     
  3. Freedbaby

    Freedbaby TPF Noob!

    Joined:
    Jan 12, 2008
    Messages:
    87
    Likes Received:
    0
    Location:
    Houston
    Can others edit my Photos:
    Photos OK to edit
    I am indeed using a light tent with three external lights but if I stop it down anymore I will no longer be able to hand hold it.

    well...maybe you are talking about strobes??

    Freedbaby
     
  4. JimmyO

    JimmyO TPF Noob!

    Joined:
    Feb 3, 2008
    Messages:
    2,132
    Likes Received:
    0
    Location:
    NJ
    Can others edit my Photos:
    Photos NOT OK to edit
    Yes
    These will be much more affective then those little lights that come with those softboxes
     
  5. Freedbaby

    Freedbaby TPF Noob!

    Joined:
    Jan 12, 2008
    Messages:
    87
    Likes Received:
    0
    Location:
    Houston
    Can others edit my Photos:
    Photos OK to edit
    so again...........more money to be spent?!?!?!?:x
     
  6. JimmyO

    JimmyO TPF Noob!

    Joined:
    Feb 3, 2008
    Messages:
    2,132
    Likes Received:
    0
    Location:
    NJ
    Can others edit my Photos:
    Photos NOT OK to edit
    Hehe
    This IS photography were talking about.
     
  7. Overread

    Overread has a hat around here somewhere Staff Member Supporting Member

    Joined:
    May 1, 2008
    Messages:
    23,084
    Likes Received:
    3,752
    Location:
    UK - England
    Can others edit my Photos:
    Photos OK to edit
    yah = also you can get some nice small tripods (I forget who makes them) which would be idealy sized and of good solid quality for macro work - much easier to deal with for this kind of work than a fullsized tripod.
     
  8. Freedbaby

    Freedbaby TPF Noob!

    Joined:
    Jan 12, 2008
    Messages:
    87
    Likes Received:
    0
    Location:
    Houston
    Can others edit my Photos:
    Photos OK to edit
    thanks for that overread...I picked up one today at the local camera shop. Small and very sturdy, but only slightly adjustable. I seems to hold either of my cameras with lens and battery grip, so hopefully when I get to work tomorrow that will be the answer.

    I didnt buy the remote control though....didnt have enough stash money in my pocket:er:

    Freedbaby
     
  9. TamiyaGuy

    TamiyaGuy No longer a newbie, moving up!

    Joined:
    Jun 25, 2007
    Messages:
    1,078
    Likes Received:
    0
    Location:
    Chelmsford, UK
    Can others edit my Photos:
    Photos OK to edit
    You don't really need a remote for still tripod photography; you can use a 2-second timer. Yep, photography can be a black hole when it comes to money, but as long as you think it's worth it... :D

    After a quick google search, I've found that a 50mm lens focusing at 18cm has a depth of field of approximately 1 millimetre.
     
  10. Overread

    Overread has a hat around here somewhere Staff Member Supporting Member

    Joined:
    May 1, 2008
    Messages:
    23,084
    Likes Received:
    3,752
    Location:
    UK - England
    Can others edit my Photos:
    Photos OK to edit
    Also use mirror lock-up mode as well with the timer - that will remove any shaking from the viewfinder mirror moving up before taking a shot. It will probably set itself to a 2 second delay between moving the mirror and taking the shot.
     
  11. Ben-71

    Ben-71 TPF Noob!

    Joined:
    Apr 28, 2008
    Messages:
    203
    Likes Received:
    0
    Location:
    Israel
    Can others edit my Photos:
    Photos NOT OK to edit
    As the closer you get to the object, the shallower the DOF,
    try taking it from a bit further, and crop.
     
  12. lockwood81

    lockwood81 TPF Noob!

    Joined:
    Jun 10, 2007
    Messages:
    887
    Likes Received:
    0
    Location:
    Daytona Beach
    Can others edit my Photos:
    Photos OK to edit
    :thumbup:
     

Share This Page

Search tags for this page

sigma50mm f2.8mm macro