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I just joined this forum because of my interest in exactly this issue. Unfortunately there is no reply till now on your request. Did you get this 210mm lens in the meantime? And if so, would you please be so kind to share your experience? I am planning to purchase either a 150 or the 210 and need a little kick in one or the other direction. Thank you. Best regards, Udo
I just joined the forum, so not really sure if this has relevant any more. Today shouting with a H3DII-39. I have the 210 mm and it is a fantastic lens, sharpness is truly phenomenal i must say. One week in Tuscany 500 exposures and about 225 with the 210 mm (rest between 28, 50, 80 and 120 MKII). I can only highly recommend this lens.
My past experince is with Hasselblad 203FE (40, 50, 80, 120, 150, 250) and Canon 5DMKII + 1DMKIV with a lot of L Lenses.
Still the 210 fare in the top of all - go for it and you'll never look back!