Long Exposures Bad for Camera?

Discussion in 'Beyond the Basics' started by tron, Jan 19, 2009.

  1. tron

    tron TPF Noob!

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    So last night i was doing some light painting and i must have taken like twenty exposures, each at least 30seconds? so this morning i find that my pictures are turning out fuzzy even with af on?

    Am i just being paranoid or is this a legitiate concern?
     
  2. dEARlEADER

    dEARlEADER TPF Noob!

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    most likely camera shake
     
  3. Overread

    Overread has a hat around here somewhere Staff Member Supporting Member

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    I am no expert on the effects of long exposures with digital (or any other form) of camea. However to assess if the problem you having is your camera or your shooting style try this;

    Mount your camera on a tripod and fix a good lens onto it
    Aim the lens at a subject which it should be able to resolve without any difficulty
    Make sure your exposure settings are right for a good exposure
    use either the timer or a remote release to triggor the shutter.

    that should give you a shot with little to no shake problems on the camera so any softness will not be a result of that
     
  4. EhJsNe

    EhJsNe TPF Noob!

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    is the Image stablization on while taking the long exposures? (im assuming you used a tripod)

    The image stablizatoin actually shakes the body/lens to compensate for the movement of your hands.

    On a tripod--since it has no movement--will cause the image to become blurry.
     
  5. Joves

    Joves No longer a newbie, moving up!

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    Using AF was probably a poor choice. With the camera on the tripod you need to measure the distance to the focal plane/sensor it should be marked on the body or, read your manual to find out where it is. Then you focus your lens in manual of course. That the good old fashioned way. Were you using your 50mm for this? It should have the distance marks on it. Oh it maybe a green dot near the rear of your top LCD.
     
  6. nikki2291

    nikki2291 TPF Noob!

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    I know that if you have image stabilization built in to the camera and not the lens then when you have the camera still it can cause softness in the camera because of the shaking inside the camera...

    ~Nikki~
     
  7. tron

    tron TPF Noob!

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    no i mean now when i take pics normally around thehouse (not long exposures) the pics look blurry. so is it possible i damaged the sensor with all my long exposure shenanagins last night?
     
  8. schumionbike

    schumionbike TPF Noob!

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    Um, put your camera on auto and shoot and see what happen, I have a D40 and I've done some long exposure and I heard of something like this. I done quite a few long exposure with point and shoot camera too.
     
  9. feRRari4756

    feRRari4756 TPF Noob!

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    to get the sharpest pics with long exposures:

    USE MIRROR LOCKUP!
    USE TIMER OR WIRELESS REMOTE!
    USE TRIPOD!
    AF is FINE w/ tripod and long exposures.
    If you have VR or IS, turn it OFF.
    Use small aperture/more DOF (if needed)

    ^^the ones in CAPS are very important.

    I take 30 or 50 sec. exposures all the time, and my pics come out tack sharp.
     
  10. Joves

    Joves No longer a newbie, moving up!

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    OK! What ISOs are you using around the house? If you are using preset modes then stop. That is where you problems lie. If you are shooting at low ISO then any movement at all will blur the image. I low light is your AF assist light firing off? Also inside you will need flash as a general rule.
     
  11. tron

    tron TPF Noob!

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    im shooting full manual, iso800, f/3.5, around 1/30 shutter speed. hmm would i use mirror lock to take pics?
     
  12. Joves

    Joves No longer a newbie, moving up!

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    1/30 is slow for indoors, unless you have really good lighting. For indoor try bumping up to 1600 or use flash. For the time exposure you need to set the distance by measuring or lighting the subject or area for the light painting. You can light the subject get the focus set then switch it to manual then shoot it. But measuring is easier to me in manual focus. Im an old timer.
     

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