This is relative to 4x5 only. I have a 65, 90, 150, 210 and 300mm lenses. I use them all, but the 150 and 90 get used the most. The 300 is starting to sneaking up there though. I would love to get a 47mm and a 450mm but that would require me to buy a new field camera, something I'm not prepared to do at this point. It's the old 80/20 rule. 80% of your pics are taken with 20% of your lenses.