I have the opportunity to have this symmar 5.6/300 convertible 12/500.
The immediate propose would be to do that kind of picture, meaning sunset with the sun right in front of the lense. Those pictures were done on Hasselblad/zeiss 4/150 CT* an 4/50 CF on provia 100F and Ekta 100VS.
Would this lense accept such sun right in face as did my Zeiss / Hasselblad ?
It will be used on a Sinar f2 4X5