i am using the old 18-135 f3.5-5.6 lens on the d80 body, but currently bought a 50mm f.18d lens for shooting, so the 18-135 lens kept aside didnt use for quite sum time,

the problem is when i put back the 18-135 lens back to the body, the top lcd display shows (F --), aperture reading gone, and AF-S display gone, put back the 50mm nothing happen..

shutter still can release but the image is black and motor does not auto focus...anyone has this issue b4 or is this the place where i put this post

me using d7000 and want to buy a fisheye lens, so the lens is the 10.5mm ones, but i was wondering if i take the 16mm fisheye fx lens, will i get the same 180' angle of view?

any user using samyang fisheye? wonder how the performance to nikon dx ones,
so if i put the 16mm fx fisheye, i would not get 180 angle view lar, due to crop factor and etc...izit?