|f/4, exp 1/8, ISO 80|
Spot focus metering
I found that a seamless backdrop set up can work really well for patches, as will a light box. The key is, that taking photos of objects such as these absolutely flat can be difficult with my tripod set up. So, I like to elevate the objects a little. I place a little bit of craft fiberfill underneath a white piece of cloth. Then I lean the patches against the cloth. I adjust the angle of my camera to reflect the patches' angles and viola!
|f/4, exp 1/5, bias +1, ISO 80|
Spot focus meters
Another thing I liked doing was grouping patches. In Boy Scouts, a participant can generate a LOT of patches. So, it's a good idea to cluster them when you can.
Good luck photographing the patches and insignias in your family history and heritage memorabilia collection.