posted on May, 14 2012 @ 03:24 AM
I assume you are using the kit lens you got with the camera?
If that is the case, there is no way you can get an aperture of f1.8. Those type of apertures are normally only available on higher end lenses, and
usually on prime lenses. Although many zooms do have that big an aperture too.
I suggest playing around with some manual settings mate. Since this is the digital age, you can take as many pics as you want!
As another poster stated, aperture, and shutter speed is important to master. Depending on the type of shot you want. Remember, the smaller the
aperture, ie, f16, f22, f32 etc, the smaller the little hole is that lets light into your camera, therefore, the slower your shutter speed will be,
otherwise it might be under exposed.
A small aperture like f32 adds lots of depth of field, so for landscapes and such, where you want all the details, it is important. For portraits, or
close ups, like the macro pics you posted, a big aperture, like a f5.6 for example is good for focusing on something close, and throwing the rest of
the background out of focus.
Also, try and shoot in RAW mode, your pictures file sizes will be massive, but it will be the best quality, and uncompressed. Where jpeg, etc the
camera basically compresses the pic, and you loose some quality.
I am not sure about the Canon, but on my Nikon, you have the option to take a single pic, in RAW and Jpeg mode, so one shot, gives you the same pic,
but in different formats.