<p>Hello!<br> May I ask if anyone owned or used this manual telephoto lens made for the medium format camera Bronica,<br> the Bronica Zenzanon 500mm E II f/8 (not the much more expensive lens with I guess having fluorite lenses).<br> I do not have a longer telephoto lens than the EF300mm f/2.8L IS USM II, and I am seldom have a need,<br> using longer telelenses than this 300mm with the Extender 2x III but because I do have the Bronica ETRS with some lenses (40/75/150mm), I did purchased Fotodiox Pro Lens Mount Adapter - Bronica ETR (ETRC, ETRS, ETR-C, ETRSi) Lens to Canon, and to be used on my EOS bodies included also for the EOS M3.<br> This lens is not heavy (1 890g) with lens construction 6-7 and with closest focus distance is 8.5 m maybe this<br> could do a better job than my 300mm with extender.<br> This Zenzanon 500/8 could also be used with my mirror-less cameras and my main question is:<br> <strong> if the so called "sweet-spot" with this lens used on a smaller sensor, of this medium-format lens,</strong><br> <strong> could give a better result in the final pictures, compared to my 300 w/ 2xIII, because this Zenzanon 500mm</strong><br> <strong>have a native focal length that is 500mm (200 x 100% / 300 = about 67%)?</strong><br> <strong> </strong><br> I wish to find a longer telephoto lens for mainly the shoot of the moon in different stages,<br> and maybe also some bird photos when I am able to use a gimbal on my sturdy tripod.</p> <p>However the EBay prices are still representing quite much money to be invested in this lens,<br> that I do not know much about from practical results used on a DSLR/Mirror-less cameras,<br> if the result will be any better than with my EF300 w/ 2X III?<br> Also maybe there would be a better alternative with other 500mm lenses (Hasselblad/Mamiya/Pentax6x7 lenses)?</p> <p>I just do not know, how good this Zenzanon EII 500mm f/8 lens is, and how the IQ will be with this lens in <br> the final photo, so if anyone here have any facts or experiences regarding this lens,<br> I would highly appreciate you to share your view and opinion about this particular lens!<br> (I can either try to find a good one of this lens or just forget about this particular lens?)<br> Thank you so very much in advance for your help to add some light how good this manual Bronica Zenzanon E II 500mm f/8 lens is!<br> Best Regards,<br> Charl (Sweden)</p>