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Re: Question about EIR

  • From: "James Bielecki" <bieleckj@xxxxxxxxxxx>
  • Subject: Re: Question about EIR
  • Date: Fri, 09 Jun 2000 11:39:27 -0400
>> No one else has mentioned this, so it made me wonder - is the focusing
>> difference of IR versus visible light not an issue with color IR? Do you not
>> have to adjust focus on some lenses as you would with B&W IR?

>One should not be correcting the focus when using EIR, as you >would do with HIE.

Absolutely correct.  The 70mm version of EIR (which is the same as 35mm I assume) is composed of three layers, two which are sensitive to visible light and one to IR.  Focus as normal.


Jim Bielecki
Silviculturist
Forest Management Division
Michigan Department of Natural Resources
1732 West M-32, Gaylord MI.  49735

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