If what you are looking for is the highest achievable brightness, contrast and sharpness during critical observations with high-end instruments, The WO 90° 2 inch mirror Dielectric star Diagonal is your choice. A premium product at a discounted price!
Ultra High Dielectric 99% reflectivity
Precision 1/10 lambda surface with
2"- 1.25" adapter with brass clamping ring.
Inside diameter (48mm): threaded to fit a variety of filters.
Weight : 470 g
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