Spotting scopes

To: bird <>
Subject: Spotting scopes
From: brian fleming <>
Date: Mon, 24 Sep 2007 18:44:47 +1000
A comment on zoom eyepieces.

Unlike most camera zoom lenses, they do not remain in focus as you zoom. I suspect that this is because there isn't much room for mechanism and several lenses in such a compact unit. Even allowing for improvements in the 5 years or so since we bought ours following an optics day put on by BA, when even Leica and Swarovski had to be refocussed, I suspect that this is still the case.

And the bigger the lens, the more light gets in - essential for antiques like me.

Brian Fleming

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