Originally posted by chesebert Beautiful lens! I'm a little envious
If you want to go through a pruning process, I'd suggest to keep the lenses that have something "special" and sell those that are more or less functionally equivalent to another one you like (and prefer to use).
In my personal experience this is especially true with recent AF lenses.
Vintage lenses are a different thing, cause the difference in optical signature can be visible enough to justify keeping objectives that are functionally very similar.
I can't see your list cause Tapatalk doesn't show signatures, but judging from the picture of the beautiful Vivitar 50mm, I guess you own lenses worth keeping... just because they are what they are
I found that the pleasure of owning/handling/shooting with optics we love is conductive to more careful shooting, and in the end to better pictures.
Sometimes we especially appreciate a lens because it's well built, a pleasure to focus, or because it's uncommon (either a collector's item or with specific features). IMO this is enough to not let it go.
Another thing I suggest is to make choices. Unless you shoot different systems together, or use a Sony mirrorless full frame, some mounts will get little or no use. Since the late seventies, I concentrated almost only on Pentax, and later on old large format lenses. In hindsight I think it made sense, and I don't regret it.
I guess each one has to come up with his/her own strategy, and have a good answer to a simple question: why did I buy this lens?
Some people hoard fifties just because it's easy to find a good bargain. Some have a very specific optical signature, but most are just copycats. Good performance but no real difference one from the other. This is a good reason to let them go...
Cheers
Paolo