>>4231554Honestly, if it's solely for this usage, the cheapest you can grab. I use the cheapo 30mm APS-C Sony E macro, and it does the job fine. Maybe one with a longer focal range if you can, it's more comfortable to take shots of your plastic butts without being bothered with the plastic hair and shit in the way. But if it's like 2x the price compared to the smaller focal length, it's hardly justifiable.