75mm for my Mamiya 6

Hi, first time poster here, thanks for the forum!

I've had a Mamiya 6mf for a long time. I bought it in Hong Kong with a 50mm and 150mm lens.

I use the 50mm a lot, and the 150 much less often. I have wondered recently whether the 75mm would be a useful addition, to fill out my Mamiya system.

So, I'm seeking other opinions on what I'd be gaining by having the 75mm in my bag. Thoughts? I do know I get one extra stop, but what else do I gain with this lens?

Thanks!

-chuck

The 75mm is the physically shortest of the 3 lenses, so it makes a nice compact package. 50 to 150 is a big jump, but unless you feel the need for something in between the two, you may not need it. I use the 75mm more than either of the others together, but that's just the way I see things.