>>4334999the topcor-s is a traditional symmetrical 6 element in FOUR group double-gauss style like a zeiss biotar except with 10 aperture blades, the nikkor-h is a 6 element in THREE groups sonnar style designed by bertele of zeiss again with 10 aperture blades...
sonnars are essentially telephoto on the front half because of their asymmetry... makes them hard to design for wide angles... gets amazing contrast/rendering at the cost of some sharpness/focus shifting. if you get the topcor it would be more of a lateral move from the canon 1.8, not everyone likes the sonnar wild backgrounds but if you do then the contrast increase would be an upgrade if you do B/W.
(nikkor on top, topcon v1 and v2 below)
