Leica HOOKI blue filter

[shortstop]

Hi,
what kind of filter is this.
Best

 

[Roger Hicks]

Either colour temperature conversion (daylight film in artificial light) or weak blue to give more haze in landscapes or "higher" skin tones by emulating ortho film. Sorry, dunno which.

Cheers,

R.

 

[shortstop]

Either colour temperature conversion (daylight film in artificial light) or weak blue to give more haze in landscapes or "higher" skin tones by emulating ortho film. Sorry, dunno which. Cheers, R.

I thought so, but my question is more specific. as there are blue filters of varying intensity, what is the corresponding Wratten number of HOOKI?

 

[Roger Hicks]

I thought so, but my question is more specific. as there are blue filters of varying intensity, what is the corresponding Wratten number of HOOKI?

Ah, sorry. The answer is still "Dunno". I can tell you that the 1967 catalogue list only one kind of blue filter, though. And, of course, not all blue filters correspond to Wratten numbers. The Germans were keen on mired filters (micro reciprocal degrees, if I remember aright).

Other than idle curiosity, why do you want to know? I must confess to idle curiosity myself but it would be easy enough to guess by comparing it with other blue filters.

Cheers,

R.

 

[D-76]

I thought so, but my question is more specific. as there are blue filters of varying intensity, what is the corresponding Wratten number of HOOKI?

80A, according to this:

http://en.wikipedia.org/wiki/Wratten_number

Well, roughly, anyway. Now, I'm not sure. I had a blue filter to fit the LTM Summaron, but I can't say if it was named after a water pipe. I think it was darker than an 80A.