Index of refraction. more power in a flatter lenses or even more in a curved one.
Size (diameter) is light gathering ability. Focal length determines magnification.
They wanted more magnification without getting larger.

Martin

Martin Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
NRA LOH & Endowment Member
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member


xray wrote:
On Wed, 22 Mar 2006 20:03:09 -0600, "Martin H. Eastburn"
wrote:


The Captains and near - would be able to see better
with the radioactive lenses.


Any logical explanation for why radioactive glass (I presume thats where
the radioactivity was) would be better optically? Seems odd. The
radioactivity can't matter by itself can it?


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