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Home > Classifieds > Astromart Classifieds > Telescope Making > Classified #281471

For Sale: E & W Optical 1.83" Fused Quartz Elliptical Flat

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Circa 1991 E&W Optical 1.83" fused quartz elliptical flat (secondary). Never used and kept in original box. Standard coating is in excellent condition. These were advertised as 1/20 wave (P-V surface), and sticker on box states same. E&W Optical sticker on back of secondary as well. No interferogram. I believe E&W had good reputation for quality flats, but some of you may know more about this than I. Buy a piece of history, and a beautiful, practical piece at that. Sorry about the repost. It was an unsuccessful last resort effort to get a photo to upload. Photo available upon request.

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