Re: "Photography by Infrared" Walter Clark

["Willem-Jan Markerink" <w.j.markerink@xxxxx>]

On 12 Oct 96 at 22:33, dlevy@xxxxxxxxxx wrote:

> It is not an issue of whether it is in print or out of print or if it is
> Laurie White or Joe Paduano's book or the writer is dead or alive, it is an
> issue of whether the copyright protects against such acts. It is the
> intellectual property of another and before publishing it (that's the act
> that you are doing), you need to confirm that the copyright has expired by
> operation of law. If not, one day you may need my services.

I am no lawyer, and I see your point, but how many cases have gone
to court with 50 year old books? Wouldn't we have known about this 
'danger', especially in the USA? 
Btw, I do recall a number of 50 years from one of my intellectual
property classes a few years ago....whether music, patents, or
written documents, none of the intellectual property rights are
infinite in time.
I also recall that this is one of the few chapters of legislation 
that have been implemented similarly in most of the civilized world.

Mmm....btw old: I believe Edward Lukacs (sp?) once mentioned his first 
encounter with HIE, albeit not by that name. 
Are we heading for an 50 year anniversary, or have we already
overslept it?....:-)) 

<jump in time>

Browsed through some old Kodak brochures again, I refreshed my memory 
about the non-existence of HIE in at least a 1947 and 1952 
brochure....yet I did find some other odd trivial details:
The predecessor of HIE was available in plates, sheet and 35mm roll. 
Not as sensitive as HIE, up to 880nm or so.
I found an interesting note about the latter, the 135-20 confection. 
I knew it was a 20 exposure film, but I often wondered about why 20, 
and not 24 or 36 (actually, I am not even sure why anyone ever agreed 
on a number; any number is trivial, not?). But now I know.
The film *did* have a length of more than 20 frames, a 7" paper 
leader preceeded the film! 
(or was that standard in those days?....8-))

It also says that loading in subdued light is possible, as well in 
normal artificial light indoors.

Other IR trivia: this time about Ektachrome, found in a new Heliopan
brochure: they show a nice picture taken with #25 red filter, far 
less monochrome than I thought, I definately wouldn't have 
recognized it as such. Yet in the general filter advise for 
Ektachrome IR they not only mention yellow (#12), orange 
(#22....mmm....that used to be #21) and red (#25), but also *green* 
(#13).
Can anyone comment on using a green filter with Ektachrome IR??
(no, I dare not speak out a prediction. too tricky.)

Gosh, maybe that stupid green filter included with my Horizon will 
get some use afterall....8-))

--
Bye,

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      The desire to understand 
is sometimes far less intelligent than
     the inability to understand


<w.j.markerink@xxxxx>
[note: 'a-one' & 'en-el'!]

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Topic No. 12