Lens question

[formica]

no because it reduces the focal length, and sometimes you want a wide focal length, and for very bright situations, you may need a slower shutter speed for eg to take action shots to show up movement

allot of lens come with a wide range in a single lens, so its less restrictive i guess, its at the extreme ends of photography where it becomes important, very dark/very bright, extreme macro/wide landscape etc etc

[red ink]

Originally Posted by formica

no because it reduces the focal length, and sometimes you want a wide focal length, and for very bright situations, you may need a slower shutter speed for eg to take action shots to show up movement

allot of lens come with a wide range in a single lens, so its less restrictive i guess, its at the extreme ends of photography where it becomes important, very dark/very bright, extreme macro/wide landscape etc etc

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

Why would people just get a lens that will limit them in aperature size? In other words why even get a lens that is not the smallest f number?

The reasoning is simple.... the bigger the maximum aperture the bigger the price tag.

[Mikoh4792]

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.

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)