Tamron sp 70-300 f/4-5.6 With VC & Autofocus Strange

Discussion in 'Digital Discussion & Q&A' started by donny1963, Apr 13, 2017.

  1. donny1963

    donny1963 No longer a newbie, moving up!

    Joined:
    Dec 15, 2015
    Messages:
    279
    Likes Received:
    25
    Can others edit my Photos:
    Photos NOT OK to edit
    I got this Tamron sp 70-300 f/4-5.6 With VC & Autofocus, something i notice, that if you focus on lets say a flower right in the center lets say 200 or 300 mm using shutter speed 1/160 F8
    ISO 100, As you go away from the center the image will seem to go out of focus, or if they was something just 1 or 2 inches in front of the subject that will be way out of focus.
    So this tells me this lens is impossible to get good hyperfocus & wide depth of field, even at apertures at F8 wich is strange not even the 7-200 i have does this..

    Just shot around to test this lens and yes in the very center it's sharp..


     

    Attached Files:

  2. jessecrowdenphotography

    jessecrowdenphotography TPF Noob!

    Joined:
    Oct 10, 2017
    Messages:
    37
    Likes Received:
    8
    Can others edit my Photos:
    Photos NOT OK to edit
    i personally recommend the
    Canon - EF70-300 IS II USM Telephoto Zoom Lens for Canon DSLR Cameras
    I use it all the time for far shots and it takes great pictures. i havent noticed a focus problem with it at all.[​IMG]
    see more pics at Jesse Crowden Photography
     
  3. zombiesniper

    zombiesniper The camera takes the Pic. I just point the way. Supporting Member

    Joined:
    Jun 23, 2015
    Messages:
    4,697
    Likes Received:
    2,844
    Location:
    Angus, Ontario
    Can others edit my Photos:
    Photos OK to edit
    Donny the images you posted are exactly what I would expect to see of a 200-300mm depth of field at around F8.
    Hyper focus and wide depth of field at 300mm and F8 just don't make sense. Even at 200mm depending on distance to subject you'll get a narrow depth of field. I think you may need to read up of depth of field calculations.

    jessecrowdenphoto, he wasn't talking about the sharpness of the lens but more the depth of field.
     
    • Like Like x 2
  4. SquarePeg

    SquarePeg Hear me roar Staff Member Supporting Member

    Joined:
    Mar 18, 2013
    Messages:
    4,999
    Likes Received:
    2,797
    Location:
    Boston
    Can others edit my Photos:
    Photos OK to edit
    I used to own this lens and never had any issues with it being soft as long as I nailed the focus point and dof that I wanted. When I got it I did have to calibrate the lens with my 7100 to get it super sharp.
     
  5. jaomul

    jaomul Been spending a lot of time on here!

    Joined:
    Feb 4, 2011
    Messages:
    5,414
    Likes Received:
    1,414
    Location:
    Cork Ireland
    Can others edit my Photos:
    Photos OK to edit
    When you focus on something close the depth of field is generally tiny, maybe even just a few millimetres
     
  6. jessecrowdenphotography

    jessecrowdenphotography TPF Noob!

    Joined:
    Oct 10, 2017
    Messages:
    37
    Likes Received:
    8
    Can others edit my Photos:
    Photos NOT OK to edit


    Ah my bad, I must have misread it. It was near 2 am when i was looking at the forum. Thank You for letting me know
     
    • Like Like x 1

Share This Page

Search tags for this page

azs