Re: Good News!

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

On 18 Feb 97 at 14:25, MartyF2938@xxxxxxx wrote:

> Good news! The Noblex filters for the 35mm camera line are now available. I'm
> holding one in my hand as I write this. The question is: as I have a #25
> filter, so I can shoot IR film in a panoramic format, should I also get an
> 87C made for the Noblex. Is threre a significant difference when using the
> two. Since Willem is the mavin and the maker, perhaps you could enlighten me.

Yep, there is a difference between the two, the unworldly effect does
increase by going with opaque filters. Note that the amount of IR
does not increase, it is just the lack of any visible radiation that 
makes them weirder than normal. Haze penetration is also improved, as 
the gain in that is basically a power 4 related to wavelength 
increase.

PS: I hope you saw this warning I posted a week ago?
You *might* need more tricks to make IR & Noblex work....if you are 
lucky it is just the back....if the swing-lens construction itself isn't 
IR-proof then all bets are off....8-((
You better first try the #25 before indulging in opaque filters....
Thumbs up, and let us know how things go!
(perhaps they changed plastics/construction over time....if not I am 
eager to yank some chains in Germany....;-))

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Date sent:        Tue, 11 Feb 1997 08:57:33 GMT
Send reply to:    infrared-photography@xxxxx
From:             "Willem-Jan Markerink" <w.j.markerink@xxxxx>
To:               w.j.markerink@xxxxx
Subject:          (Fwd) IR & Noblex pan cameras

>From the Panorama Mailinglist....thought this might interest some
IR-panorama nuts....comments very welcome!

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From:          ALAN_KAFTON@xxxxxxxxxxxxxxxxxxxxxxx
Date:          Mon, 10 Feb 1997 13:34:36 -0800
To:            Panoramic Imaging E-mail List
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John wrote:

        Every depth of field chart I've ever seen for Widelux, and I've owned at
        least one each F5, both F6 models, several F7's, and an F8 since the   
        mid-70's, has shown infinity not coming in until f11.  It's a point I  
        always try to impress on new users of Wideluxes and something we always had
        trouble with while renting cameras.  It was also a big reason I was excited
        about the newer Horizon and Noblex cameras, the ability to shoot landscapes
        at "wider open" apertures. Don't know about your reference to IR, infinity
        and f5.6, but I know a  number of people shooting IR successfully with
        Wideluxes for many years now.  Geir Jordahl in the Bay Area of California
        would be the first one that comes to mind.  A very successful user of IR
        film in a Widelux for a long time now.

Quite correct, I've seen MANY truly excellent IR images taken by Geir with many
Widelux cameras he's had over the years.  Interesting, however, is that the Noblex
35 didn't work for him for IR images.  It seems the Noblex is not IR light tight. 
Geir tried several cameras all with the same results.  He even tried lining the
camera back (where he suspected it was leaking) with lead foil to no avail.

Cheers,

alan_kafton@xxxxxx


--
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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