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Old 10 November 2011, 11:19 AM   #16
"TRF" Member
Join Date: May 2011
Location: Cali
Posts: 152
Originally Posted by Nanuq View Post
Here's a picture of an aftermarket looking at a distant object. See the exaggerated "ring" around the perimeter? As you move the crystal around it takes on the appearance of a toroid.
Will take a look at that. I wonder if its more subtle with T19s b/c its a smaller dome. You certainly don't see any "rings" looking straight on when the background is closer as in your second picture.

Also to clarify, in the picture of the crystals side by side on graph paper, the authentic T39 is the middle one? If that's the standard, then A, D and E seem to exhibit similar optics.
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