November 22, 2014, 09:31:06 PM

Author Topic: Ultrafast wide angles  (Read 7739 times)

Viggo

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Re: Ultrafast wide angles
« Reply #15 on: April 17, 2011, 06:39:14 AM »
Please rent a 24 L II and use it for two days, then all your questions will be answered. My most used lens for everything.
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Re: Ultrafast wide angles
« Reply #15 on: April 17, 2011, 06:39:14 AM »

Lawliet

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Re: Ultrafast wide angles
« Reply #16 on: April 17, 2011, 12:18:15 PM »
I wonder how big the filter threads would need to be?

Depends on your definition of need. With long lenses you have a hard lower limit on the filter size, not so with the wide ones. Here you want the front element to be as bulbous as possible to avoid a shallow angle of incidence.
Compare the Nikkor 17-35/2.8,16-35/4, Canon EF 16-35/2.8I and 17-40/4, as counterpart we have the Tokina 16-28/2,8 which has got really good corners.

neuroanatomist

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Re: Ultrafast wide angles
« Reply #17 on: April 17, 2011, 04:16:13 PM »
I wonder how big the filter threads would need to be?

Depends on your definition of need. With long lenses you have a hard lower limit on the filter size, not so with the wide ones. Here you want the front element to be as bulbous as possible to avoid a shallow angle of incidence.

The original 16-35mm f/2.8L used 77mm filters.  The MkII version uses 82mm filters.  I'd expect an f/2 version of such a lens to be designed for at least 86mm filters, perhaps 95mm filters - getting further into the area of hard-to-find filters.  Even with my 16-35mm f/2.8L II, though I have a B+W Käsemann CPL in 82mm (which also fits my TS-E 42mm f.3.5L II), I'd really like a dark ND filter (e.g. 10-stops), but they aren't available in round/threaded.
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Re: Ultrafast wide angles
« Reply #17 on: April 17, 2011, 04:16:13 PM »