John_K
old hand
Reged: 03/09/2006
Posts: 732
Loc: North Yorks
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I don't mean the Wratten 25 deep red, but the opaque filter version. I bought a SFX kit which came with a gelatine I/red opaque filter in a mount that fitted the Cokin 'P' holder. It works well too with my 28/105 Nikkor. However the gelatine filter is held in a sub mount which gives extreme vignetting when I use it with my 17/35 Nikkor Is there anyone who produces a 'P' size IR opaque filter that slides into a cokin mount with no sub mount
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beejaybee
Marvin
Reged: 18/07/2007
Posts: 6283
Loc: Really Here In Name Only
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Quote:
Is there anyone who produces a 'P' size IR opaque filter that slides into a cokin mount with no sub mount
I suspect you may be better off looking for a filter that screws directly into the filter thread on your lens. They're not cheap. For SFX you probably want the B+W 092 rather than the 093 which may not pass enough "short" infra red to activate the film.
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John_K
old hand
Reged: 03/09/2006
Posts: 732
Loc: North Yorks
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No there is no vignetting with a normal 'P' series Cokin and I use these regularly I was just trying to find out if anyone made one with the opaque I/R filter. The one that came with the SFX, the overall mount is the same as a cokin filter, but the actual gelatime filter part itself, is in a circular aperture only appox 60mm in diameter. Not even as big as the FRONT element of the 17/35
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Nod
Carpal \'Tunnel
Reged: 08/04/2006
Posts: 5533
Loc: Devon, UK.
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Just measured the aperture of my SFX filter for Cokin P and it's 75mm across. Not quite big enough for the blu-tak, although you might get away with it.
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