A&P Focussing Problems

Discussion in 'Lifestyle' started by pelf, Jul 30, 2006.

  1. pelf

    pelf The Juice Was Worth The Squeeze

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    I am in Europe and have been doing a lot of landscape shooting. I have been using auto focus but the pictures arent really coming out that clear everywhere.

    I tried manually focussing to infinity and that doesnt work either.

    Id upload a pic but im connected at 28.8k and kind of limited by that.

    Anyone have any idea why nothing is really focussing great?

    I am using a D70 with a 18-200 vr
     
  2. ittech

    ittech "If You're Not Part of the Solution, There's Good OT Supporter

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    post a couple resized pics that maintain the EXIF info (use photoshop to resize)
     
  3. ittech

    ittech "If You're Not Part of the Solution, There's Good OT Supporter

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    Also try to use a tripod and F11, manually focus on something about 4 feet in front of you in the scene and give that a try
     
  4. pelf

    pelf The Juice Was Worth The Squeeze

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    Sucked it up and uploaded some samples

    This is what I am getting:

    How does the focus look in these? Am I just being way too picky?

    Once again, D70, 18-200 VR, Auto Focus, Shooting in Program Mode. Using a CPL filter. Only changes to photos are resize and levels.

    Here are 3 samples:

    [​IMG][​IMG]
    [​IMG]
     
  5. ittech

    ittech "If You're Not Part of the Solution, There's Good OT Supporter

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    Sorry! The image contains no EXIF information. :eek5:


    I can see what focus point your camera used with the exif info... as well as f/stop etc...
     
  6. ittech

    ittech "If You're Not Part of the Solution, There's Good OT Supporter

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    looks acceptable in the resized images, hard to tell though... what was your F/stop, looks more like you need to stop down 1-2 stops more for example on the sandy beach shot and maybe focus a bit further into the scene if it is grabbing the sand closest to you which is what it looks like.
     
  7. pelf

    pelf The Juice Was Worth The Squeeze

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    How can I save for web and retain the EXIF?

    I use the center focus point for all the pictures and usually focus on something farther away
     
  8. ittech

    ittech "If You're Not Part of the Solution, There's Good OT Supporter

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    This is the kind of info that helps.

    Notice the focus point, however this is handheld with center AF and I actually focused about a third into the scene where the lower green grid line is. Thus the background is still sharp and the girl is more in focus than she would have been if i had just focused at the arch. (though not as much if I had moved back, focused on her foot and used F/16 or so)


    [​IMG]
     
  9. ittech

    ittech "If You're Not Part of the Solution, There's Good OT Supporter

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    don't use save for web, in photoshop use save as, jpg.


    also focusing farther away usually works but if there are objects in the foreground they will usually be out of focus then so it can help to "balance" it out by focusing and recomposing closer.

    IMO anyways, I'm not a super pro or anything.
     
  10. pelf

    pelf The Juice Was Worth The Squeeze

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    Exif information for DSC_52213181.JPG
    =============================================================
    Tag Name Description
    -------------------------------------------------------------
    Manufacturer of equipment NIKON CORPORATION
    Model of equipment NIKON D70
    Sofware used Ver.2.00
    Exposure time 10/2500second(s)
    F number 6.30
    Exposure program Normal program
    Exif Version 0221
    Date time original 2006:06:28 20:03:57
    Date time digitized 2006:06:28 20:03:57
    Exposure bias 0.0Ev
    Metering Mode Pattern
    Light Source Unknown
    Flash Unknown
    Lens focal length 18.0mm
    Supported Flashpix version 0100
    Color space Daylight
    Valid image width 3008
    Valid image height 2000
    Sensing method One-chip color area sensor


    ----------------------------------------------------------------

    #2
    Exif information for DSC_49052888.JPG
    =============================================================
    Tag Name Description
    -------------------------------------------------------------
    Manufacturer of equipment NIKON CORPORATION
    Model of equipment NIKON D70
    Sofware used Ver.2.00
    Exposure time 10/2000second(s)
    F number 7.10
    Exposure program Normal program
    Exif Version 0221
    Date time original 2006:06:25 22:41:48
    Date time digitized 2006:06:25 22:41:48
    Exposure bias 0.0Ev
    Metering Mode Pattern
    Light Source
    Flash Unknown
    Lens focal length 18.0mm
    Supported Flashpix version 0100
    Color space Daylight
    Valid image width 3008
    Valid image height 2000
    Sensing method One-chip color area sensor

    ---------------------------------------------

    #3

    Here is EXIF in corresponding order:

    Exif information for DSC_48252808.JPG
    =============================================================
    Tag Name Description
    -------------------------------------------------------------
    Manufacturer of equipment NIKON CORPORATION
    Model of equipment NIKON D70
    Sofware used Ver.2.00
    Exposure time 10/2500second(s)
    F number 8.0
    Exposure program Normal program
    Exif Version 0221
    Date time original 2006:06:25 22:29:42
    Date time digitized 2006:06:25 22:29:42
    Exposure bias 0.0Ev
    Metering Mode Pattern
    Light Source
    Flash Unknown
    Lens focal length 18.0mm
    Supported Flashpix version 0100
    Color space Daylight
    Valid image width 3008
    Valid image height 2000
    Sensing method One-chip color area sensor
     
  11. pelf

    pelf The Juice Was Worth The Squeeze

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    What do you mean by focus and recompose closer?
     
  12. ittech

    ittech "If You're Not Part of the Solution, There's Good OT Supporter

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    I'd say for example that number 2 needs a smaller aperature (higher f/stop) to get more of the sand/water ripples in focus.

    hard to tell without knowing exactly where it's focusing etc. You are using a tripod?

    also some lenses (all my canon lenses) focus past infinity so you can't just turn it towards infinity as far as it will go or nothing will be in focus.

    it's hard to see but you can use the DOF preview button if you have one to help with manually focusing these scenes for what you want most in focus.

    Most of my sharper landscapes are around F8 but I bracket aperature a lot doing landscape.

    You don't just want to stop down as much as possible as over F16 diffraction really starts to pick up and can make the whole object softer.

    I also don't know much about the 18-200 but it sounds like way too much focal range to be that sharp... a 24mm prime or something may be your best bet and should be cheap.
     
  13. ittech

    ittech "If You're Not Part of the Solution, There's Good OT Supporter

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    try this and see how it works compared to what you normally do... (take pics both ways and compare)

    set F/8-13 Aperature priority
    center af only single shot af
    frame your shot at your intended zoom level, tilt camera down, AF about a third into the original shot pressing the button half way, after it beeps then tilt the camera back to the intened composition, and shoot the pic

    then let it reset focus to something else, and shoot it with center focus on the far object like you have been doing it.

    Sometimes it works and sometimes it doesn't, it's all a calculation called the Hyperfocal distance and you need a calculator for it to work it out. I have one on my pocket PC that I will occasionally use.

    Then again many times I get lazy and still comes out sharp but I do take a ton of shots and pick one.
     
  14. pelf

    pelf The Juice Was Worth The Squeeze

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    I will try all that.

    I am not using a tripod....Do I need one at these shutter speeds?

    I know this isnt the best lens for landscape but its what I have to work with for now.

    I also turn it towards infinity but take it all the way to the end. Maybe it is focussing past infinity? I will experiment with that as well.

    I also just realized that I had the camera in continous shooting mode. Does that affect the focussing if I am only focussing and shooting one shot at a time?

    I will give this stuff a shot and see what happens tomorrow.
     
  15. ittech

    ittech "If You're Not Part of the Solution, There's Good OT Supporter

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    At your current shutter speeds not really... though to stop down a couple stops you would need a tripod, or higher ISO (noise) So basically yes you may need a tripod. A tripod never hurts :)

    You can try setting camera on a beanbag and use self timer, or one of the mini fold up tripods should work if that lens isn't too big.

    Always take a noisy image over a shake induced blurry image or a shallow DOF over a deep DOF with blurry shake.

    VR/IS would also help alleviate the need for a tripod but you don't have it.

    I use continuous shooting all the time just make sure the focus is not continuous.

    If your shutter speed is dropping into the questionable range, try being very still and hold your arms into your body, and shoot a burst of 3+ pictures.

    The first picture you take is generally blurry from the action of pressing on the camera shutter, then it usually stabilizes for the second shot which you try to keep as still as possible, then release after the second shot but wait for the third as otherwise the action of releasing can move the camera as well.

    You should also be using raw (NEF) if you have the space.
     
  16. pelf

    pelf The Juice Was Worth The Squeeze

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    The 18-200 is a VR lens and I am using it. Do you still suggest tripod?

    I havent been using NEF...I am using a 1gb card and I have a 320gb ext. hd but I hate having to go in and individually open and edit hundreds of pics....Is it really worth it?
     
  17. Phlea

    Phlea OT Supporter

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    Have you tried shooting with VR off...?
     
  18. ittech

    ittech "If You're Not Part of the Solution, There's Good OT Supporter

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    Cool.. but VR only gives you 2-3 stops of "help" so if you are getting down to say 1/60th to 1/20'th of a second I would go tripod. Depending on your type of VR you may have to turn off VR on a tripod as well.

    But handholding definetly leave it on, I can't imagine it hurting.

    and yes RAW is a much better workflow... I shoot RAW+JPG and any snapshot stuff I just keep the JPG only, anything else I keep both, anything I really like or want to print then I do all the RAW stuff which is really pretty straightforward with Adobe Camera Raw...
     
  19. pelf

    pelf The Juice Was Worth The Squeeze

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    No I havent tried shooting with the VR off. Do you think that might be causing a problem? Maybe its malfunctioning or something?
     
  20. Airpoppoff

    Airpoppoff Vodka > Racing F1

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    http://forums.offtopic.com/showthread.php?t=2670923

    I took mine back already, Waiting on a new one from my shop.
     

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