Sigma's earlier 500mm for Nikon — the f/4.5 EX APO without OS, same as ID 4098.
The Sigma 500mm f/4.5 EX APO DG for Nikon F is a variant listing of the super-telephoto described under ID 4098. Same lens — APO correction, HSM motor, no OS. At 500mm f/4.5, serious super-telephoto reach. The non-OS design predates the later 500mm f/4 Sports. Check if this is the same as ID 4098 before purchase.
Same outstanding super-telephoto optics as ID 4098. APO elements control chromatic aberration. HSM motor for fast quiet AF. The f/4.5 provides adequate speed. Sharpness very good. The lack of OS is the main limitation. Compatible with Sigma teleconverters. Tripod essential at this focal length and weight.
Nikon F mount. Rear drop-in filter. Weight approximately 3,150 grams. Professional EX build. No OS. Same specifications as ID 4098. Do not purchase both if the same lens. HSM AF. Tripod or gimbal required. The 500mm f/4 Sports is the improved successor with OS and weather sealing.
Same as or very similar to ID 4098. Very affordable versus Canon/Nikon 500mm alternatives. Check OS status — this version lacks stabilisation. The Sports version is preferred. Only at significant discount versus the Sports. A professional super-telephoto at budget pricing.