What drives me to purchase the Nikon 14-30mm f/4 S lens when I have an F mount Nikon 14-24mm f/2.8? The answer is in three parts - First I am moving away from Nikon DSLRs and want to begin replacing my legacy lenses with S lens equivalents. I know the 14-30mm S lens is not an f/2.8 but I really don't care at this moment in time since I am still retaining my 14-24 f/2.8 until 2020 which correlates with Nikon formal release of the faster f/2.8 S version, then I will sell my old legacy lens. Secondly, I wish to remain current with my lenses to camera mounts, as I reduce my F cameras and lenses I will add to my S lenses and Z camera system. Finally, the compact, light, and filter ready 14-30 make this lens a standout.
One question people ask is the 14-30mm f/4 S lens a replacement for the 14-24mm f/2.8? The answer is no, but if you just do not need the faster f stop then Yes. I will not give up my 14-24 until Nikon releases the 14-24mm S lens in 2020. Then it will be a replacement a one for one swap out.
Another question is the expense: How can an f/4 lens be a whopping 1,300.000? (I rounded up). In my opinion, it appears Nikon is pricing themselves into a corner. This tactic translates to a company who is losing sales/customers and needs to increase the price to make up for their shrinking customer base or somehow the price of plastic has gone way up. I believe it is a combination of increasing labor, production, material cost, and shrinking customer base. Everyone knows the lens is too expensive but yet we keep shelling out the cash for them. Sad but True.
How am I dealing with the transition to Nikon Mirrorless: Painfully to put it mildly. I have been with Nikon for many decades, this is the worst transition yet, cost wise. It would have been much different If I was offered a Mirrorless camera with very capable focus performance and a set of lenses from the rip, but Nikon is trying to entice beginners and enthusiast with their first run of Z and S rather than offering a solid pro level / semi-pro lineup. I believe a true pro-level mirrorless will not happen until late 2020 or early 2021 and until then we get strung along.