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  1. #1
    Join Date
    Dec 2007
    Posts
    2,562

    Test images with Tokina AT-X840 80-400mm

    I haven't had much time to take any shots with the Don's Tokina AT-X840 80-400mm. Here are two shots I took today. I have to get used to the extra 100mm and the weight.

    Frank

    Name:  6094781024_fcc1cd3a58_b.jpg
Views: 294
Size:  191.5 KB

    This shot is a little soft due to camera shake.

    Name:  6094781054_76ef78cf16_b.jpg
Views: 310
Size:  245.7 KB
    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/

  2. #2
    Join Date
    Nov 2004
    Location
    Wild, Wonderful, Wyoming
    Posts
    1,043
    The first one looks good, sharp, good contrast. I've always like Tokina lenses, I used to have a 12-24 f/4, it was a very good lens, when I purchased my 5D I sold it, my 17-40 had close to the same UWA range then.

    @ Don, whoa! Camera shake with a Sony with SSS???? Cmon I thought this was a thing of the past! I thought that's why all of us should switch to Sony, blurry photos due to camera shake will be a thing of the past...

    Actually Frank it looks like a little bit of back focus, the feathers on his wing are pretty sharp.
    A good photograph is knowing where to stand.
    Ansel Adams

    Rule books are paper, they will not cushion a sudden meeting of stone and metal.
    Ernest K. Gann-Fate is the Hunter.

  3. #3
    Join Date
    Feb 2006
    Location
    Des Plaines, IL
    Posts
    9,554

    Lightbulb Keep that DOF in mind...

    With a long telephoto shot, you have to be cognizant of the Depth of Field (DOF). You guys know that. Heck, it is razor thin with the 135mm @ f/1.8

    I suggest running the numbers in the DOF calculator and get comfortable with what it takes to get a "foot" of focal depth out of the lens at 400mm. Remember, this is also a "crop" camera, not a FF. Select: "A700, A550, A500, A450"

    From what I have determined, @ 400mm... your aperture would have to be f/22 and you would have to be back to about 25-feet!

    At 100mm, things are a little more generous, with and aperture of f/8 and only 10-feet away. Zooms have their limitations when you have a chubby, 3D target and it want it in focus, front-to-back.
    Don Schap - BFA, Digital Photography
    A Photographer Is Forever
    Look, I did not create the optical laws of the Universe ... I simply learned to deal with them.
    Remember: It is usually the GLASS, not the camera (except for moving to Full Frame), that gives you the most improvement in your photography.

    flickr & Sdi

  4. #4
    Join Date
    Dec 2006
    Location
    God's Country - Australia
    Posts
    10,415
    Quote Originally Posted by sparkie1263 View Post
    I

    This shot is a little soft due to camera shake.
    lol camera shake at 1/1250s ? no, i dont think so. its just misfocussed.
    D800e l V3 l AW1 l 16-35 l 35 l 50 l 85 l 105 l EM1 l 7.5 l 12-40 l 14 l 17 l 25 l 45 l 60 l 75
    flickr

  5. #5
    Join Date
    Nov 2008
    Location
    Monmouthshire, UK
    Posts
    2,152
    Frank,
    The goose was walking towards you.
    If there was any delay between focus lock and shutter release, back focus.

  6. #6
    Join Date
    Nov 2004
    Location
    Wild, Wonderful, Wyoming
    Posts
    1,043
    Thanks for the photography lesson, Don...This little exercise shows that SSS is just a very small part of having this stuff all work out. There are many other determining factors with steadiness just being one of them. Thanks Frank for having the nuts to post this shot. Sony cameras miss shots too....or is it the photog behind the camera? Nothing against you, Frank, I have have a trash basket full of missed this or that, I think we all do.
    A good photograph is knowing where to stand.
    Ansel Adams

    Rule books are paper, they will not cushion a sudden meeting of stone and metal.
    Ernest K. Gann-Fate is the Hunter.

  7. #7
    Join Date
    Dec 2007
    Posts
    2,562
    I think Peter is right. There is always a lesson to be learned. If I didn't post this I would have thought it was camera shake. I do have a steady hand. Almost all my images are hand held. I always check the SSS meter before I take the shot. I will check the DOF chart. The EXif for that image was iso 400, f/8, 1/1250 at 200mm.

    Here is the DOF caculation for that image.

    Subject distance 15 ft

    Depth of field
    Near limit 14.7 ft
    Far limit 15.3 ft
    Total 0.52 ft

    In front of subject 0.26 ft (49%)
    Behind subject 0.27 ft (51%)

    Hyperfocal distance 820.9 ft
    Circle of confusion 0.02 mm

    Thanks
    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/

  8. #8
    Join Date
    Dec 2007
    Posts
    2,562
    Here are a few more images from today.

    Frank

    Name:  Butterfly.jpg
Views: 234
Size:  96.4 KBName:  Finch.jpg
Views: 217
Size:  97.8 KBName:  Pigeon.jpg
Views: 221
Size:  115.4 KBName:  Seagull.jpg
Views: 230
Size:  98.9 KB
    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/

  9. #9
    Join Date
    Nov 2008
    Location
    Monmouthshire, UK
    Posts
    2,152
    Gets easier when the little B****** stand still and cooperate, what!

  10. #10
    Join Date
    Dec 2007
    Posts
    2,562
    LOL It does help!!!


    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/

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