<p>I tend to agree with Shun's comments about the DF. I have had mine for more than a year and can't complain about the camera, the user interfaces, and the sensor. I agree that Nikon picked the D4 sensor because they knew that many buyers would be using older lenses and that this sensor behaves extremely well with older F lenses. I also don't think that Nikon will make another DF, and if they do, it will basically be the same camera with only a few changes. The D4 sensor will be used again for the reasons that I and Shun mentioned. I think that Nikon will make more accessories for the DF, like the handle that they just recently introduced. The next version, if any, might offer for example, interchangeable screens.<br>
As for making a smaller DF with an APS-C sensor, what would be the point if you can't use older lenses the way they were intended to be used, without the crop factor? Nikon would also have to introduce a whole new line of retro aperture dialed lenses for APS-C format. Turning the DF into a mirrorless camera like the Fuji XT-1 is highly improbable mainly because this would require a whole new set of lenses designed for a camera with a different register between lenses and the sensor.<br>
The DF is a niche product designed for guys like me that enjoy using dials like in the old days. It's not a hipster camera as mentioned by many when it first came out. These people simply misunderstand the appeal that this camera has for older photographers like me. Will they make an upgrade? I don't think they have to. Most DF owners like the camera and don't need any substantial changes. </p>