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William Optics 2 Inch Dielectric Diagonal for SCTs
If what you are looking for is the highest achievable brightness contrast and sharpness during critical observations with your SCT WO 90? 2 mirror Dielectric star Diagonal for SCT is your choice. Ultra High Dielectric 99% reflectivity for SCTSpecificationsUltra High Dielectric 99% reflectivity Precision 1/10 lambda surface with 10mm-thick mirror.2- 1.25 adapter with brass clamping ring.Inside diameter (48mm): threaded to fit a variety of filters.Internal safety stop prevents 2 barrels from hitting the mirror. Compression rings (both on diagonal and adapter) to prevent barrels marring.Fits any standard SCT on the market.2 to 1.25 eyepiece adapter included. Lock screw for eyepiece/adapter.Big knurled thumbscrews easy to turn even with gloves on.Weight : 470 g
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