Fujinon 14mm 2.8 R $700 Rokinon 12mm F2 $300 Samyang 8mm 2.8 ii Fisheye $300 All make wonderful astrophotography lenses, with great coma correction. Will consider trades/part trades for Nikon FX lenses (manual focus ai or ais, or autofocus, dont need 50mm's), gimbal head. Could use some wides like the Rokinon 14mm 2.8, 20mm 1.8g, Rokinon 24mm 1.4 in Nikon Fx. 250-732-1712 if texting is easier