Model consists of 9 objects, grouped into single group for easier appending/linking. Left and right lens enclosures have proper local rotation constraints set to simplify binoculars manipulations; central rotor object is set as parent object for both enclosures.
Materials: all procedural PBR based on Principled shader, thus widely compatible with modern PBR renderers. No texture files used.
UV maps unwrapped.
HDRi environment map (Blue Grotto, public domain) packed in .blend for more realistic reflections, as well as put into supporting items separately.
All imagery is done via Cycles / Filmic (Base Contrast profile), no post-processing.