Field Flat and Sharp, Edge to Edge !
B&L Criterion ceased operations here in Connecticut in November of '87 - We acquired all the remaining Telescopes and Accessories at that time -This is one of those items.
Just another one of Hundreds of Unique Astro Accessoriesfrom an accumulated Inventory extending over 40 Years !astroptx.com
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Filed under: Eyepieces & Accessories