I was watching one of those Froknows videos and he mentioned that DX lenses are not good with FX cameras, but FX lenses are amazing with DX cameras. I am kind of concerned with this. I wouldn't be if I had the cash or what I thought was the skill level to go straight to a full frame camera, but I don't. My next camera will most likely be a D90/7000(or whatever the replacement name is) or a D300s. So that will put me at having a few years on the DX system, and hopefully multiple lenses. Now once I get my next camera I will most likely be buying almost all FX lenses anyways since it will have internal AF, but the few lenses that I have or will get that are DX, like the ones I have now, and soon the 35mm f1.8, and possibly the 18-200 VR, will they be okay to use with a full frame? Or will they effectively leave my collection on the day that I do upgrade to FX?