Nikon's upcoming NIKKOR Z 120-300mm f/2.8 TC VR S lens is a game-changer for sports and wildlife photographers, offering a built-in 1.4x teleconverter that extends its reach to 420mm at f/4. This feature, combined with its constant f/2.8 aperture and in-lens optical stabilization, makes it a versatile tool for professionals. However, the lens's weight and price tag are significant considerations. With a potential retail price of around $10,599 and a weight of approximately 2.59kg, it's a substantial investment. The internal teleconverter adds to the complexity and cost, making it a more ambitious offering compared to Canon's RF 100-300mm f/2.8 L IS USM and Sony's FE 300mm f/2.8 GM OSS. Nikon's decision to build a fast zoom with an internal teleconverter is a bold move, but one that may not be justified in terms of optical, autofocus, and price compromises. The lens's position in the Z mount lineup, above the 70-200mm f/2.8 VR S zoom and below the 400mm f/2.8 TC VR S prime, fills a gap for sports and wildlife photographers who need a versatile tool for their kit. However, the lack of information on autofocus motor type, minimum focusing distance, and the ability to use external teleconverters is a concern. The final specifications, weight, and pricing are expected closer to the lens's commercial launch, leaving photographers and filmmakers to wait and see if Nikon's ambitious offering is worth the investment.