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Τετάρτη, Νοεμβρίου 27, 2013

Aperture range

A good aperture range: translation from a greek post (

First I want to clarify that it is not necessary to know one the details about photography to take good photos nowadays. And neither one can learns how to shtoo because they read a couplke of things on the internet.
Fortunately, digital technology provides us with useful automatic little cameras, so all we have to do is to stand in a place that that gives us a good view, to have the right lighting and shoot. Now if this photo is going to like to someone else except us, it is always a matter of taste.
However because these camera have limitations, it is advisable to learn two or three basic characteristics and learn a little theory behind these features, and to understand that there are restrictions and if it is possible to overcome them. But to do that , we must deal with our camera for hours, and we know well how our camera "behaves". And then we'll take good pictures .

But let's do a little recap

F1.8 - F16
F1.8 F2.8 F4 F5.6 F8 F11 F16

A great "maximum apperture" ( ie the low value of f / stop, F1.80 it is an advantage .
Allows more light to reach the image sensor, and thus lets you use higher shutter speed. The highest shutter speed freezes the action and stops the effect of camera shake, so the image is not blurred. That is if you want to freeze the image and not have any movement, you need to have high speed shutter, eg 1/1000.  More movement will occur in half a second, that of the 1/fourth. And most things will happen in 1/500 of a second than the thousandth.

Another advantage of the great "maximum aperture" is that it provides shallow depth of field. That can not photograph very far. This allows the background to blur nicely thus isolating your subject (especially effective when shooting portraits ).

A small "minimum" apperture ( ie reaches up to F8) is also an advantage. Allows you to use a slow shutter speed on a bright sunny day. A slow shutter speed allows you to check the movement. That will make that distinctive blur that reveals the movement.
Another advantage of the small opening is to increase the depth of field. Increasing the depth of field allows you to take landscape photos, where a large part of the image is in the foreground and reaching as far back ( usually , "infinity") But having clear display. Not to blur the background .