I have the Olympus 30mm macro. Fairly inexpensive , tiny and weighs next to nothing. Perfect for both 35mm and roll film. I also do 4x5 single shoot. Good enough for me. I also use the high res mode available on my camera.
It does 2.5x magnification, if you ever want to get really close in for a good look at the grain.
Before, I only had the 60mm macro, which is more premium and weather sealed, but I couldn't raise the copy stand enough for roll film. Or at least, I didn't want to because of vibration.