Quote:
Originally Posted by red ink
Focal length is not affected by aperture... All aperture does is control depth of field. You can get low end lenses that have a maximum aperture of 5.6 but have a focal length of 200mm and you can get 200mm lenses that have a maximum aperture of 2.8.
In bright situations you want faster shutter speeds to control your exposure if your not going to close your lens aperture down - which will change your depth of field. You will blow out the image if you don't.
@Mikoh
The reasoning is simple.... the bigger the maximum aperture the bigger the price tag.
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Ah I see. So you can basically do the same with a bigger aperature lens...it's just you have more options with a bigger aperature lens?(since you can always lower aperature with your camera)
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