Canon 100-400 f4-5.6L IS USM Lens

[Neilly]

Re: Canon 100-400 f4-5.6L IS USM Lens

Usually I use a 70-200 f/4L with a 1.4x extender.

Noticeably slower in focussing

Hi Andy,

If you found the 100-400mil slower then there's something wrong with it. I have tried the 70-200 f2.8 + 1.4TC and that was much slower in the AF department. My 100-400 is good throughout the whole range, but like Colin says f8+ the for best setting. Its a lens that does like a lot of light.

TTFN,
Neil

[colin C]

Re: Canon 100-400 f4-5.6L IS USM Lens

I'm pleased she is still looking after you David.

Colin

[djguk47]

Re: Canon 100-400 f4-5.6L IS USM Lens

..........A very versatile telephoto zoom and in many respects I wish I still had one.

Colin

She still loves you Colin and should have sent you a Christmas Card but was "down under" over Christmas and missed the post.....

David

[colin C]

Re: Canon 100-400 f4-5.6L IS USM Lens

Good light and stop it down to F8 with a high shutter speed. Mine didn't fall off at all at 400mm, was slightly softer at 70mm but you'd be hard pushed to noticed.

A very versatile telephoto zoom and in many respects I wish I still had one.

Colin

[AndyL]

Re: Canon 100-400 f4-5.6L IS USM Lens

Thanks, if you want to meet up there, just drop a line.

[Hereford_EOS2]

Re: Canon 100-400 f4-5.6L IS USM Lens

The sweet spot, as you call it, is at f/8 on the Canon 100-400mm lens.
There is a slight drop (only slight) in resolution at 400mm.

Llanelli WWT is on my list for this year.

[AndyL]

Hi, I have borrowed one of these for a week to see if it will augment my wildlife togging with some better closeups etc. Usually I use a 70-200 f/4L with a 1.4x extender.

Noticeably slower in focussing, but not by a lot, I'm just wondering what the "sweet spot" of this lens is in terms of aperture and zoom.

If you'd like to share your experience with this lens, I'd be most grateful.

(Shot attached from Llanelli Wetlands today)