Canon Zooms - F2.8 or F4.0

[bennito42]

I currently own the Canon F4.0 24 - 105 L zoom together with an F4.0 70 - 200 Canon L series.
As I am mainly taking landscapes and candid (street scenes), I am thinking about changing the 24 - 105 lens for the F2.8 24 - 70 L series.
Taking into account costs (I'll sell the F4.0 24-105) , I wondering if there are enoughadvantages to buy the F2.8 lens ???

[I @ M]

Bit hard to answer that one without knowing the sort of quality of images you are producing at the moment with your current gear, how about sharing some that you have taken in the last 2 1/2 years that you have been a member here.

[Scotty72]

The advantage of a F/2.8 compared to a f/4 is 1 stop of light

[peterb666]

Rather than dump a perfectly good lens, why not get the Canon 16-35mm f/2.8 and head into UWA territory. It will exend your range with lanscapes.

[etherial]

Two questions. Do your find yourself looking for an extra stop of Shutter speed? How often do you use your 24-105 at longer than 70mm?

[fabian628]

if you require a shallow depth of field, yes
if you find you need faster shutter speed in low light, yes

I think the image stabiliser will be better for low light if you do not need to stop action. Then again the camera may need the wider aperture to lock focus.
You may also consider the size of the 24-70. Its bigger than the lens you currently have. Might affect your decision.

[jdbb]

I've got the f2.8 24-70L - it's a good lens but I'm thinking about changing it for a f4.0 24-105L to fill the gap between the 24-70 and the 100-400.

[bennito42]

Thanks for your replies...... think I'll stick with what I've got, and maybe save for the Canon 16 - 35

[Xenedis]

The f/4L zooms you have are fantastic lenses; they're just a stop slower than their f/2.8 alternatives.

If you require more depth of field, the f/2.8 aperture will not be particularly useful. If you want to freeze movement in dim light, f/2.8 helps. You may still need to push your ISO depending on the scene.

I use my 16-35/2.8L II quite extensively, but rarely wide open, as I shoot a lot of seascapes, landscapes and cityscapes, where I want depth of field. I shoot mostly at f/11 or f/8.