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Re: Testing Focal Lengths of Lenses

  • From: Dan Slater <dslater@xxxxxxxxxxxxx>
  • Subject: Re: Testing Focal Lengths of Lenses
  • Date: Fri, 08 Dec 2000 20:51:50 -0800
George Pearl wrote:
Hello Roundshot VR camera owners!    I have made tentative special arrangements with an optical testing company to test lens focal lengths for us once every 3 months at a price of $50.00 per lens. It doesn't matter what kind of lens you send or how big of a lens. You will receive the effective focal length of each lens back in return with your lenses unharmed. We are looking for this to take about a week or so per session as long as you give us your Fed-X number for shipping / insurance.


Are any measurements made other than the effective focal length (I am assuming at infinity focus)?

What is the accuracy of the focal length measurement?

Dan Slater