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Thread: Hawk with Robin

  1. #21
    Join Date
    Dec 2007
    Posts
    1,760
    were you using af?

  2. #22
    Join Date
    Dec 2007
    Posts
    2,562
    Yes I was.

    Frank
    Sony A77
    Sony A580
    Sony A 100
    Maxxum 400si.
    Sony 18-70 Kit Lens
    Minolta AF 35-70
    Minolta AF 50 f/1.7
    Tamron 70-300 f/4-5.6 Di LD
    Tamron 60mm Macro
    Tamron 17-50 f/2.8
    Tamron 2x Converter
    Sony HVL-F42AM
    Quantaray 70-300 4.5-5.6 Macro
    Slingshot 200 Bag



    http://www.flickr.com/photos/22083244@N06/

    http://s305.photobucket.com/albums/nn219/sparkie1263/

  3. #23
    Join Date
    Dec 2007
    Posts
    1,760
    it's never perfect...

  4. #24
    Join Date
    Nov 2008
    Location
    Monmouthshire, UK
    Posts
    2,152
    Quote Originally Posted by sparkie1263 View Post
    can the camera cause back focus?? I thought it was a lens problem.
    Frank
    B/F issues are rarely an individual lens problem, although a lens can contribute to an additive set of negative tolerances.

    Quote Originally Posted by sparkie1263 View Post
    How can I test to see if it is the camera or the lens. I have been using this lens for 3 years and never had a problem.
    It's still not a big problem with that particular lens, certainly at the long, f/5.6 end with increased DOF. B/F issues become critical with the narrow DOF associated with fast lens. You need to test with your 50mm f/1.7 and you could start with the "battery" test.

    I had a quick look at your Flickr gallery and the first image on the first page, Grayden 2......

    Name:  Frank Grayden2.jpg
Views: 42
Size:  31.2 KB

    ....exhibits some front focus. Easy to see that the Front of the tray, his fingers and the pattern on the right sleeve (his left) are sharp whereas
    the ears and the pattern on the left sleeve (his right) where it joins the black is already going OOF.
    As you were using f/5, the issue is disguised by three times the DOF compared to the case had you been using f/1.7 and fortuitously, the plane of focus was also in your favour.

    Perhaps you've have the same issue with the A100.

  5. #25
    Join Date
    Dec 2007
    Posts
    1,760
    Are you using 'spot focus' setting?

  6. #26
    Join Date
    Dec 2007
    Posts
    2,562
    Thanks Peter for taking the time to help. I will do the battery test.
    Yes I always use spot focus.

    Frank
    Sony A77
    Sony A580
    Sony A 100
    Maxxum 400si.
    Sony 18-70 Kit Lens
    Minolta AF 35-70
    Minolta AF 50 f/1.7
    Tamron 70-300 f/4-5.6 Di LD
    Tamron 60mm Macro
    Tamron 17-50 f/2.8
    Tamron 2x Converter
    Sony HVL-F42AM
    Quantaray 70-300 4.5-5.6 Macro
    Slingshot 200 Bag



    http://www.flickr.com/photos/22083244@N06/

    http://s305.photobucket.com/albums/nn219/sparkie1263/

  7. #27
    Join Date
    Mar 2011
    Posts
    3
    Very Very Nice shot, and beautifully focussed.
    and it's nature

  8. #28
    Join Date
    Mar 2011
    Posts
    3
    very very nice shot it is wounderful
    and i proud the camera man

  9. #29
    Join Date
    Mar 2011
    Posts
    3
    Quote Originally Posted by SONYNUT View Post
    were you using af?
    exhibits some front focus. Easy to see that the Front of the tray, his fingers and the pattern on the right sleeve (his left) are sharp whereas
    the ears and the pattern on the left sleeve (his right) where it joins the black is already going OOF.


    I had a quick look at your Flickr gallery and the first image on the first page, Grayden 2......

  10. #30
    Join Date
    Dec 2007
    Posts
    1,760
    take a shot of your lawn looking down at 45 degrees..see if the spot center is the best focus..@ lower f

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