Which lens is better for portrait or macro?

First, consider 35MM/ 1.8 plus a macro mirror. Putting 35MM on D3 100 is equivalent to a 50MM macro mirror, which can be achieved within the budget.

Second, considering 60 macro, a more professional macro lens that takes into account the sharpness of the portrait head is very good, but as a portrait head, the focus is a little slow. This is slightly higher than the budget. 1900-2000 will do.

50MM is not recommended, because the focal length becomes 75MM on D3 100, so it can't be used indoors, and it can only be used outdoors. At the same time, if macro mirrors are considered, it is recommended to buy 4X and 8X, which can give consideration to the macro effect. However, macro mirrors cannot fully open the aperture, and the best effect can be achieved by reducing 2-3 steps.