Legacy vs E-Mount Lens IQ

You obviously have a Minolta adapter.  But Canon made a series of lightweight "plastic" zoom lenses towards the end of the FD mount manufacture.  They are light and easy to handle on an EVIL-type camera body and make respectable images.  Those lenses were not "cheap plastic" but a lasting industrial grade similar to that currently used on the 100mm f2.8 macro lens.  Ex-slr manual lenses are not very popular and are usually at bargain prices.

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Tom Caldwell