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Re: Newbie question about lenses

  • From: George L Smyth <GLSmyth@xxxxxxx>
  • Subject: Re: Newbie question about lenses
  • Date: Fri, 10 Jul 1998 06:40:28 -0400
Birger Aune wrote:
> 
> Hello everybody
> 
> I have a question concerning lenses and focusing for IR-photography. If I
> use an apochromatic lens, will I then have to adjust the focusing when
> using infrared film ?

You'll need to check with the manufacturer, as some extend into the infrared,
while others do not.

george

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