What We Like
+Remarkably lightweight for 500mm super-telephoto reach; weighs only 1375g, lighter than the shorter GF 250mm f/4
+Excellent optical quality with minimal aberrations; sharp edge-to-edge performance with minimal distortion and chromatic aberration
+Powerful 6.0-stop optical image stabilization enables handheld shooting at long focal lengths
+Fast and quiet autofocus with internal focus design and linear motor for responsive subject tracking
+Doubles the telephoto reach of previous GFX system, enabling sports and wildlife photography on medium format
+Compatible with optional GF1.4X teleconverter for extended reach to 554mm full-frame equivalent
Worth Knowing
−Effective focal length of 396mm full-frame equivalent due to medium format crop factor means less reach than full-frame telephoto alternatives
−Plastic construction on barrel raises durability concerns compared to premium telephoto lenses despite solid build quality
−Autofocus can hunt slightly at near minimum focus distance; better suited for longer working distances
−Maximum aperture of f/5.6 requires more ambient light compared to faster full-frame telephoto options