Lee wrote:
> I've recently bought my first Digital SLR, a Nikon D40 with 18-55mm
> lens. The quality of pictures it's taking is great. I'm mostly playing
> around with the preset scenes before getting in to the more
> complicated settings. The only trouble I am having is with the depth
> of field, I can get my object (person, boat, whatever) in focus but
> everything else in the picture is out of focus, noticeably. Comparing
> this with my Kodak point-and-click, I used to take a picture and my
> foreground and background would both be perfectly focused
> auotmatically but I can't seem to acheive the same with my SLR. The
> following is a link to a picture taken with my point-and-click where I
> have good depth of field but I can't see how to acheive this with my
> new camera (http://www.trekearth.com/viewphotos.php?l=3&p=506700).
Any
> advice on firstly, why this is the case and secondly, how to correct
> it, would be very appreciated.
>
To get more depth of field, you need to use a smaller aperture (higher
f-number). That picture was taken at f/4.1 at 1/750s. Since there
doesn't appear to be any need to freeze motion in that shot, I would've
thought that f/16 at 1/50s would be more appropriate. For more
information on Depth of Field, look at:
http://www.cambridgeincolour.com/tutorials/depth-of-field.htm
The difference between your Kodak and a DSLR is that the point and click
has a tiny sensor, which means that it uses a much shorter focal length
for a similar angle of view, which in turn gives far greater depth of
field.
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