Hutech Astronomical Products Equipment for the Serious Amateur Astronomer
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Specifications: Focal length : 50mm F-ratio : 2.8 (~16) Lens configuration : Fully multi-coated 6 elements in 4 groups Filter size : 37.5mm Back focus : 41.3mm Parts configuration (from left ) : 2850 - 7844 - 7840 - 7843 - 5013 (for Sony E mount) Part #2850 EL-BORG 50/2.8 Lens 2018-01-03