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Your question boils down to "is the 25/2 Batis the pinnacle of optical design; is it not possible to do any better." The answer is no; it is a local optimum of performance size and price. Some companies that will make custom lenses for you include Panavision, Caldwell Photographic, and JML Optical among enumerable others. You can expect to pay $10-$100k ...


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When you are the NASA you can have lenses made to your specs, in particular the Zeiss Planar 50mm f/0.7. But if this lens also had a noted career in cinema, its original purpose was more reconnaissance/surveying. There are also lens that Hasselblad made for the Apollo missions. But if one was designed for this from the ground up (the Biogon f-5.6/60), other ...


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There are lots of lenses that are better than kit lenses such as the typical AF-S DX Nikkor 18-55mm f/3.5-5.6G VR, for example. That's not to say that the current 18-55mm "kit" lenses from Nikon and others are bad. Everything on the market from the major camera manufacturers is pretty good these days. It's just that some lenses, to borrow a phrase ...


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