What you see up here is one of the meanest accessory for slr cameras ever. With a look of a sniper rifle it’s giving the phrase “shooting some pictures” a real meaning. Now you can call your portraits headshots for a reason! 
Upper one is from Leica, and lower one from Nikon.
Both “guns” hold 400mm lenses. If you would like one check Tamarkin.com
D.
Jap, I’m Nikon user 
And, here I made a list (kinda wishlist) of my favorite Nikon (Nikkor) lenses 
Unfortunately, i don’t have any of those… yet 
Nikkor 85mm f/1.4D
Nikkor 105mm f/2.8G VR
My personally favorite lenses (both 85 and 105) I prefer telephoto lenses and macro as well, because I really like all the details.
Nikkor 70-200mm f/2.8 VR
70-200mm f/2.8 VR is one of the two lenses used by most professional photographers every day. It’s Nikon’s latest professional workhorse lens. It has all appropriate specifications as you would expect
Nikkor 14-24mm f/2.8G ED
The second of those most commonly used lenses by professional photographers is this wide 14-24mm f/2.8. Wicked colours, sharp as hell and no other defects.
Reflex-Nikkor 2000mm f/11
The biggest telephoto lens I’ve ever seen. I’s huge
Nikkor 6mm f/2.8 Fisheye
And the widest lens I’ve ever seen (it captures 220° )
D.
