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Thread: (NTP) : Aperture Challenge : 2011

  1. #21
    Member ninja em's Avatar
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    aside from the purpose of the exercise, I just love the subject of the two photos from Arj
    Last edited by ninja em; 08-02-2011 at 2:15am.

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    Quote Originally Posted by ninja em View Post
    aside from the purpose of the exercise, I just love the subject of the two photos from Arj
    So how about giving the exercise a go yourself?
    "It is one thing to make a picture of what a person looks like, it is another thing to make a portrait of who they are" - Paul Caponigro

    Constructive Critique of my photographs is always appreciated
    Nikon, etc!

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    My Photography

  3. #23
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    Ok I just did this challenge while sitting here reading this tonight so no fancy pics here. I chucked a few things on the dining room table as I don't have tripod here to stop movement, Also has poor flurescent light aswell but still got the point. The first Pic I took at F4.5. They keys are the focal piont and the only thing in focus. The next F22 and all clear...this second pic took quiet a while to take hence the sitting on the table. I thought i had the ISO set at 100 for both but wouldn't that mean the pics took the same time to take?
    I enjoyed the challenge I learnt from it, Thanks!
    Woops guess i don't know how to add pics yet
    Last edited by cindy82; 10-02-2011 at 8:41pm.

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    There we Go!!
    Last edited by cindy82; 10-02-2011 at 8:47pm.

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    Does anyone know why I would only have two f setting f6.4 and f3.1, as I own a Fujifilm s1800?

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    Quote Originally Posted by photoexplorer View Post
    Does anyone know why I would only have two f setting f6.4 and f3.1, as I own a Fujifilm s1800?
    Some cameras really limit your ability to choose settings. I would have to look into this further and see what I can find out for you.

  7. #27
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    According to your manual - page 40 you can set apertures. See page 43 of your manual for more information. If you get stuck ask again here.

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    Can someone please tell me what I am doing wrong - I have tried numerous times to take photos, of different subjects outside, changing the aperature from f3. to f22 and they are all turning out very dark; yeet when I take the same photo using the automatic option it works beautifully? I have a Nikon D60 with kit lens 18-55mmm.

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    Just want to say the same thing happened when I tried to change the ISO, for the ISO challenge.

  10. #30
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    f22 ISO 100 6sec

    f2.8 ISO 100 1/13sec

    Here are my two photos. enjoy.

    What i noticed was
    smaller f stop = longer exposure = greater DOF
    larger f stop = shorter exposure = shallow DOF

    btw Love these challenges!

  11. #31
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    Quote Originally Posted by jtp22 View Post
    What i noticed was
    smaller f stop = longer exposure = greater DOF
    larger f stop = shorter exposure = shallow DOF

    btw Love these challenges!
    I'm confused now , shouldn't it be the other way around e.g. larger f number = longer exposure = greater DoF
    and smaller f number = shorter exposure = shallow DoF

  12. #32
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    Quote Originally Posted by Kaktus View Post
    I'm confused now , shouldn't it be the other way around e.g. larger f number = longer exposure = greater DoF
    and smaller f number = shorter exposure = shallow DoF
    f22 is a small hole and will give you greater DOF

    f4 is a big hole and will give you what is call a Shallower DOF

    When I say , Hole thats the size the Aperture blades make at that setting

    Usually you use (As an example) f4 for Portraits , So you blur the Background (Shallow) with a nice Bokeh to highlight the subject

    Landscapes you go for greater DOF and use (Example) f8 upwards to f22

    Hope thats not to confusing - Bill
    Last edited by William; 13-02-2011 at 12:32pm.
    Canon : 30D, and sometimes the 5D mkIII , Sigma 10-20, 50mm 1.8, Canon 24-105 f4 L , On loan Sigma 120-400 DG and Canon 17 - 40 f4 L , Cokin Filters




  13. #33
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    Quote Originally Posted by William View Post
    ... Hope thats not to confusing - Bill
    Thank you for explaining

    I think I'm confusing myself with not being able to understand the 'terminology'.
    My thinking was that: smaller f stop means a smaller number e.g. f2.8 = a large 'hole' or aperture opening
    and larger f stop means a larger number e.g. f22 = a small 'hole' or aperture opening.

    So, if I understand your explanation correctly then the term f stop actually describes the size of the 'hole' i.e. aperture opening and not the f number.

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    Yep , I think you've got it , If you want to highlight a particular subject and take out any other distractions use a smaller f stop number f2.8

    If you want the whole scene in Focus , Go to a higher f stop f10 to f22 , eg , Landscapes/Seascapes , Funny I used to go to a beginners photography class and even there , Understanding the f stop was the hardest thing for people to get their heads around - Cheers Bill

  15. #35
    Member macrocephalic's Avatar
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    Quote Originally Posted by arj View Post
    nice shots itybitypieces.

    the second shot (f22) looks a lot "whiter" and brighter to me than the first. eg. look at the colours of the eggs. Can someone explain why?
    Part of the reason (but not the whole reason in this photo) is vignetting. When the aperture is really wide (small f stop) you get darkening around the edges of the pictures (varying depending on the lens and sensor size) called vignetting. This is because when the aperture is small (high f stop) only the light from the centre of the lens makes it through to the sensor. When the aperture is large (low f stop) the light from the whole of the front of the lens is going into the sensor - but the edges of the barrel get in the way a bit and cause shadows (can't think of a better way to describe it). If you stack too many filters and shoot with wide open aperture then the vignetting gets worse, because the edges of the filters are making the shadows worse.

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    I found the problem. It appears when I changed the aperature reading I also changed the exposure compensation which was making the photos very dark.
    Here is the photo taken at f4.5
    Aperature f4.jpg

    Here is the photo taken at f29
    Aperature - f29.jpg
    Apart from some slight changes in DOF, not so clear I really can't see a significant change??
    Last edited by ElizabethAtkinson; 15-02-2011 at 7:20pm.

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    [/QUOTE]Apart from some slight changes in DOF, not so clear I really can't see a significant change??[/QUOTE]

    I'm still getting my head around this too, but I think when you use f29 you might find camera shake as the shutter stays open longer to adjust for light so check your exif data to see if shutter speed changed in relations to change in f setting, cause when you change your f your shutter will decide on the best setting.
    I have to add I am still learning this but feel that I'm getting there. Can someone with more experience confirm.
    Nikon D90, Nikkor 50mm, Nikon 18 - 105mm

  18. #38
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    What I noticed about this was that sometimes the camera would go higher than 22 or not as low as 3.5 depending on the image or lighting. At first I was playing with the exposure compensation but then I realised and set that to 0 again. With the 22 shot I cant see any bird in complete focus but all are way more defined in this. Using the 4.5(the camera wouldnt go to 3.5 which it did on some outside shots) the first owl is the focus. Both were taken with ISO 100.
    f 22


    f 4.5

  19. #39
    Member daggert's Avatar
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    I mainly focus on birds and flowers with my photgraphy. From my limited concept of this stuff if I wanted to take a close up of a flower then I should go with a bigger aperture to capture the whole flower and do away with the blurred egdes of the petals?

  20. #40
    Member itybitypieces's Avatar
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    and when you took these two photos what did you notice with the shutter speed
    [SIGPIC][/SIGPIC] K100d super 18-50mm sigma kit lens

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