"Lee" <leemeadowcroft@[EMAIL PROTECTED]
> wrote in message
news:12961aa7-c975-4bc7-90f9-693ecb91dafb@[EMAIL PROTECTED]
> Thanks for the comments. I'm struggling understanding the relation****p
> between aperture size, shutter speed and iso and how you can adjust
> them to get the correct focus and depth of field. Don't get me wrong,
> I understand these things take time and need to be learnt, I have a
> good book that I'm reading and am working through the manual for the
> camera.
>
> The reason I was asking is because I went out for a walk with the kids
> yesterday and got some great action shots of them and some good shots
> of the landscape but any shots of them had a blurred background and
> shots of the landscape had a blurred foreground, both of these types
> of picture would of been enhanced by a bit more focus at short and
> long range.
>
> Rob, thanks for the explanation and the link. That makes sense. So if
> I manually increase the f number I get better depth of field. I've
> just tried this and my shutter speed is much slower for higher f. This
> isn't great when I don't yet have a tripod. So I then tried manual and
> took a few pictures with various values of f and shutter speed e.g.
> f16 and s125. I can see very well what effects this has on the
> picture, the colour of the sky, the darkness of the foreground, the
> depth of field etc. Now that I know I can change the settings to
> achieve what I want to achieve, I will try to understand it a bit
> better so I can take the photos I want to take. My earlier concern was
> that I didn't feel I would be able to take pictures as good as with my
> point-and-click. Many Thanks.
>
> Terry, I appreciate some good pictures can be taken with an out-of-
> focus background, especially when it's done on purpose. However, I am
> learning and need to understand why these things happen so that I can
> decide what happens when I take the picture and not just accept what
> the camera gives me. Changing my camera isn't going to help me learn
> to use my DSLR and get better at photography.
>
> If I'm going to move away from the standard aperture priority or
> shutter priority methods to get the ideal photos, is there a rule of
> thumb on what combinations of settings work best for a particular
> photo e.g. what range of shutter speeds should genearlly be used with
> an f of 16 or 22.
>
> Thanks again.
>
> Lee
In simple terms, since that's all I can handle, the bigger the aperture
(lower
f-stop), the shallower the depth of field is, that is, objects in front
and
beyond
the focused object will be out of focus; conversely, the amaller the
aperture
(higher f-stop) the deeper the depth of field; that is, object in front
and
beyond
the focused object will also be in focus. This technique may work better
with
long zoom lenses.
You may offest a bigger aperture with a faster shutter speed (bigger hole
to
allow
light in, but only a shorter time to allow it in), and a smaller aperture
with a slower
shutter speed (smaller hole to allow light, but more time to allow it).
Although,
keep in mind that, say, decreasing aperture 1 stop, and then increasing
shutter
speed 1 stop does not guarantee, to say the least, the same composition
from
the aperture/shutter settings' 1 f-stop before.
That's my amateur explanation.
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