A:Answer Yes, the AF-S NIKKOR 50mm f/1.8G will be compatible with the Nikon D3400, D700 and D7000. All three of these cameras are compatible with AF-S, G type lenses. You would have to keep in mind that this is a lens made for Full Frame Cameras, so on the D3400 and D7000, which are Crop Sensor cameras, there will be a 1.5x crop factor with this lens. Meaning the AF-S NIKKOR 50mm f/1.8G will act as a 75mm lens on the D3400, D7000 and all other crop sensor cameras. Since the D700 is a Full Frame camera, there will be no crop factor and the AF-S NIKKOR 50mm f/1.8G will be 50mm.