ELNikkor wrote:
I also have a D5100, and was looking to go FX, largely because the D5100 was getting "long in the tooth", and I had a lot of lenses from my film days I wanted to use on a 24x36 sensor. I chose the D750, as it was being offered with a 24-120 f4 lens and battery pack for under $2000, (which matched the amount my rewards credit card had saved), so it would be a "free" upgrade. I had imagined the D750 would offer the most versatility, as the DX lenses would work on it, it had buiilt-in flash, and a moveable screen. Although I have 18-55, and 55-200 DX lenses, I don't use them on the D750. If I put them on, there is a window which shows the area which the sensor will cover, but it is easy to forget about those lines. and compose so the subject ends up outside the frame. I've seen articles which suggest some of the DX lenses reach beyond the DX format, (specifically the 35 1.8 prime), but it is generally advised that, if you get an FX camera, you find a way to get FX lenses to use on it.
I also have a D5100, and was looking to go FX, lar... (
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I shoot a D600 FX body and shoot a DX 35mm f1.8 in full FX mode. I like the darkened corners, a built in retro look for my street photos.