Sold also under Exakta and many other brands. True maker is unknown to me, Asia for sure.
It's NOT fixed aperture! At the long end it has aperture of f/16, which is totally unusable for anything that moves even slightly. You won't able to focus, et cetera. Don't get it. It's utter crap. If you want to shoot birds and cheaply, get an used Sigma f/8 600mm mirror. You can even handhold the sigma for good results! Fra

