I've recently purchased my 2 first N-lenses: N 70-200 mm and N 24-85 mm. Iâ€™ve never used Contax before. I noticed that N 70-200â€™ AF works relatively slow compared to N 24-85â€™ AF. Also, when working with N 70-200â€™ AF the lens makes short (not usualâ€¦as it seems to me) noises. Is it normal? Iâ€™m wondering if itâ€™s supposed to work like that or somethingâ€™s wrong with my N 70-200..? Can anyone who uses or used to work with this lens answer my question? Should I really be worried about that? Thank you in advance.