Which aperture to use?

Question by bob: Which aperture to use?
I’m struggling to find out which aperture to use on certian photographs. Is a 4.0 aperture good all round or should I change it for lighter pictures. I take photography at college but the cameras there are different and they tell you what is a good aperture. Whenever I press the button to show the aperture everyting above 4.0 looks too dark through the lens so should i even bother changing it?
If i wanted to take a more blurred picture of a moving object with a shutter speed of less than 100 how high should the aperture so not too much light shines on the film?

Best answer:

Answer by sneezecoughwheeze
The button you’re talking about is the aperture preview button. When you press it it stops down the camera so you can see the change in the depth of field. When you use the aperture preview while looking through the viewfinder, it’s going to be darker the higher the f-stop you’re using.

When you use higher f-stops when actually taking a picture, the camera automatically compensates for the loss of light by leaving the shutter open for longer. Higher f-stops (smaller apertures) don’t mean darker pictures, it’ll just turn out darker when you see it through the viewfinder.

If you want to shoot pictures that you can intentionally blur, use a shutter speed of around 1/50 second.

Set your camera to shutter priority (Labeled “Tv” on Canon cameras) and set the shutter speed to around 1/50 second. The camera will automatically compensate for the slower shutter speed by using a smaller aperture to get the appropriate exposure.

If you’re wanting some literature on the basics, I highly suggest checking Amazon for a copy of The Photography Bible by Daniel Lezano. It’s a great book to reference.

Hope this helps!

What do you think? Answer below!

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2 Responses to Which aperture to use?

  1. DigiDoc says:

    Optimum aperture is generally the roughly middle number on the lens. This is generally 5.6 or 8.0 This will be the maximum sharpness (not to be confused with depth of field).

    EVERY aperture you preview will be dark, the higher the f-stop the darker it appears. This has nothing to do with anything. The preview button is for checking your depth of field.

    What you need to learn and understand is “depth of field”. Do a search and learn some more about what it is, what it means, and why/when to use different f-stops.

  2. victor98_2001 says:

    f/16, f/19 and f/22 were the most sharpest images, f/3.5, f/4 and f/5.6 were blurred the images,very easy don’t you think so.

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