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Compatible Arrays: EMC VNX series
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William Optics RedCat 91 WIFD 91mm f/4.9 Apochromatic Refractor Telescope (OTA Only K4320 Compatible Arrays: EMC VNX seriesFeaturing an image circle big enough for medium format photography, the RedCat 91 WIFD 91mm f 4. 9 Apochromatic Refractor Telescope from William Optics is a photo only optical tube assembly built for making gorgeous deep sky images. The RedCat 91 features a fully multicoated five element lens with super ED, ED, and Lanthanum elements in a field flattening Petzval design that delivers edge to edge sharpness and eliminates complex back focus
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