Getting Rid of blur

Discussion in 'Photography Beginners' Forum' started by 5ubz3r0, Jan 21, 2010.

  1. 5ubz3r0

    5ubz3r0 TPF Noob!

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    Hi!

    I have asked this question in another thred of mine but thought it would probably gain more attraction in it's own.
    I took this pic a few days after I received my Nikon D5000 (I'm very new to photography) I just took this pic whilst playing with the settings on my camera and quite liked it. Looking at it closely I realised his hand is blured :grumpy:. How can I stop this from happening? Apart from adjusting the shutter speed. Can this be amended in programmes such as Photoshop and Lightroom 2? Like a sharpening tool? Please let me know!!

    [​IMG]
     
  2. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    No, you can't really fix blur with photoshop or other programs.

    Consider it like this. If you want to 'fix blur', what are you really wanting...sharpness. So if you have, for example, a blurry hand, you would need a sharp hand to 'fix' it. A digital image is just a collection of pixels...if you want to change or remove something, you have to replace it with something.
    So unless you have (within that image or in another one) a sharp hand that can be used to actually replaced the blurred one, then you are S.O.L.

    There are sharpening tools in both Photoshop and Lightroom...but they don't actually fix blur. They increase the contrast between shapes/colors (pixels).
     
  3. Overread

    Overread has a hat around here somewhere Staff Member Supporting Member

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    Motion blur in a photograph is one thing that photoshop can't get rid of* so you have to fix this in camera - sometimes its worth it to even underexpose the image to ensure that blur does not occur (one can add brightness and work with a darker shot to far more extent than with the unfixable blur).
    I would strongly recomend the book Understanding Exposure by Bryan Peterson - it is aimed at beginners but goes into enough depth in an understandable language that you can build up a good understanding of exposure and how aperture, shutter speed and ISO work together to give you an exposure.

    Essentially for you to stop motion blur you need a faster shutter speed on the camera so first lets look at the settings you used on the shot (you can get this from the properties of the image file - right click and go to properties - then details - then scroll down to find aperture, shutter speed and ISO)
    f4.2, ISO 800 and for some reason opera is not reading the shutter speed... but regardless this tells me that you had your aperture at a wide (small f number) setting and thus were letting in more light. (infact considering the kit lenses you were probably at the widest aperture the lens could achive at that focus point).
    ISO is also pretty high as well as 800 - and you will have seen the effect of this in the shot by seeing more noise (dots) over the image. This is the limit of ISO since whilst rising the ISO will give you a faster shutter speed it also increases your noise. At what level this becomes unusable is mostly down to personal taste and the shooting conditions.

    Ok so with the light you have in the scene you still have the blur - what's next? Well boost the local lighting - which means reflecting more light onto the subject or flash. With the popup flash you often get rather harsh lighting and a counter to that is to use a few folds of white toilet paper (or any similar fabric which is white) and wrap it around teh flash head - that will give some softness to the light - not much, but enough to help take the edge off


    *some graphic artists might very well be able to of course, but it would take a lot of hours and a lot of skill and work to fix in just a single shot
     
  4. gsgary

    gsgary Been spending a lot of time on here!

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    1/60 @ 135mm is way too slow, this is probably as good as you are going to get with the equipment you have, best bet is shoot him outside in good light
     
  5. 5ubz3r0

    5ubz3r0 TPF Noob!

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    Thank you both for very informative replies.

    Big Mike: Thanks again, Unfortunatly I dont have a sharp hand to replace :( I could take a pic of mine and replace it but I fear it would be to big! lmao!

    Overread: Once again thank you. So basically everything about my photo was wrong! lol. My lense taking this picture was a Tamron 70-300mm. Shutter speed was 1/60, I could of done with 1/120? or 1/160?
     
  6. Overread

    Overread has a hat around here somewhere Staff Member Supporting Member

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    hmm no no I think you missunderstood (or I wrot it badly). You used the widest aperture - f4.5 and a high ISO. Combined together that gave you a shutter speed of 1/60sec in that lighting. The only way to get faster was to use a wider aperture (smaller f number) which that len's won't do at longer ranges; or use a higher ISO (myself 800 is the limit I will go to any higher and noise kills the image quality and even 800 is rather too high - 400 is my max most times).
    The final bit is that sometimes there is just not enough light for an image (especailly indoors where it is infact quite dark photography wise) and so boosting the lighting is the only method left open - save for changing the location
     
  7. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    The rule of thumb, to avoid blur from camera shake, is that you want at least 1/focal length. So if you are shooting at 300mm, you will want at least 1/300 for a shutter speed. Some also say that you should take the 'crop factor' into that equation, (1.5 for your camera) so you'd want a shutter speed of 1/450 when shooting at 300mm. That's going to be hard to do when your max aperture is only F5.6 (you would need very bright light).
     
  8. 5ubz3r0

    5ubz3r0 TPF Noob!

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    I deffinatly need read that understanding exposure book. I was looking at it the other day. Will buy it at the end of this month. I'm going to go home and look at my Camera and keep adjusting to see what effects what (like you said ISO and aperture gives your shuter speed) I thought I could adjust my shutter speed manually without combining ISO with aperture?
     
  9. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    Well, you can adjust it...but it will affect your exposure.

    Maybe try to think of exposure (the basis of photography) as a triangle between shutter speed, aperture and ISO. You need all three in order to make an exposure. There is a certain combination that will give you 'correct' exposure for a certain amount of light. (correct being a subjective term).
    So let's say the combination for your shot is F8, 1/125 and ISO 100. You can adjust the shutter speed, but unless you also adjust the other settings, it will change your exposure. So if you change the shutter speed to 1/250 (on stop faster than 1/125), you would need to open up your aperture by one stop to F5.6.
    Now if you wanted to adjust your shutter speed another stop, to 1/500, then you would need to open up the aperture another stop to F4.
    The problem is that sooner or later, you will hit the maximum aperture of the lens. In your case, the maximum aperture of that lens (at full zoom) is F5.6, so you couldn't open the aperture that far.
    However, you could adjust the other aspect of the triangle, the ISO. So if you want the shutter speed to be 1/500, and the aperture is maxed out at F5.6, then you would have to increase the ISO to 200.
    If you increased the ISO to 400, you could use a shutter speed of 1/1000. You won't get much (or any) blur at that speed.
    The trade off is that higher ISO will give you more digital noise.

    (Keep in mind that these are just examples, your settings will depend on the light that you are shooting in).
     
  10. ClickCrazy

    ClickCrazy TPF Noob!

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    There is some great advise here and should all be tried , however I am surprised no one has mentioned one obvious culprit. Camera shake , a tripod is always advisable. If your camera has vibration reduction you could try that as well.
     
  11. HikinMike

    HikinMike No longer a newbie, moving up!

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    ....and in this particular shot....a 4 year-old moving around! :thumbup:
     
  12. 5ubz3r0

    5ubz3r0 TPF Noob!

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    Thanks again for all of your advise!

    My Lens says f4-5.6, how comes I can only go down as far as 5.6?

    Yeah there was a thred on some website explaining the triangle of exposure - but was at work so had to be called to fix some servers.

    Faster Shuter speed is less in qualitys isnt it?
     

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