Originally Posted by
Black Pearl
The longer the focal length the further you will be from your subject and still get the same magnification - in the case of macro you're generally looking for 1:1 and the distance you need to be to achieve it:
AF-S DX Micro NIKKOR 40mm f/2.8G - Closest Focus: 16.3cm
AF-S Micro NIKKOR 60mm f/2.8G ED - Closest Focus: 18.5cm
AF-S DX Micro NIKKOR 85mm f/3.5G ED VR - Closest Focus: 28.6cm
AF-S VR Micro-Nikkor 105mm f/2.8G IF-ED - Closest Focus: 31cm
AF Micro-Nikkor 200mm f/4D IF-ED - Closest Focus: 50cm Manual Focus only on your D3200
I'll let you look up the local prices but brace yourself as the length goes up.
You could also consider Sigma:
MACRO 50mm F2.8 EX DG - Closest Focus: 18.8cm
MACRO 70mm F2.8 EX DG - Closest Focus: 25.7cm
MACRO 105mm F2.8 EX DG OS HSM - Closest Focus: 31.2cm
APO MACRO 150mm F2.8 EX DG OS HSM - Closest Focus: 38cm
APO MACRO 180mm F2.8 EX DG OS HSM - Closest Focus: 47cm
Prices will be a little less eye watering but the quality is still outstanding - note the first won't auto focus on your camera as they don't have built in motors.
One other thing to note - while using all macro lenses can be a bit of a challenge due to limited depth of field and the fact that the slightest movement will have the subject out of the frame the longer they are the bigger this issue becomes. I have use the Nikon 200mm a few times and while it is amazing it was the biggest PITA I have ever encountered.