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I need something wider. I'm looking recommendations for a ~35mm full frame equivalent. I want a lens great at something. That could be sharpness, bokeh, price, etc. I'm just looking for interesting options. Otherwise, priorities are lightweight, cheap, and fast. Quality should be good, doesn't need to be great. That's a lot to ask, so I'm willing to compromise.
Currently thinking the G 28 or the Rokkor 28 f/2.8. G 28 for its weight and quality, Rokkor for its rendering and price. Would love something faster, but don't want to carry around a brick either. CV 28/1.9 seems nice on paper but way too expensive. Any thoughts?
The CV 28/1.9 is a real pain to focus on Mirrorless bodies, not enough contrast, especially wide open. Otherwise a great rendering and sharp lens. I liked mine as an RF lens but not so much on mirrorless. It's also on the larger side for an RF 28.
My suggestions would be to go for a compact and inexpensive SLR 24. The three that immediately come to mind are the Nikkor 24/2.8, the Olympus 24/2.8 and the Sigma Super-Wide II 24/2.8. All are very good, small to very small (the Nikkor, largest of the three, is the same size as the Zeiss ZA E 24/1.8 when mounted on an adapter) and can be had for under $200. A 28 will be longer than a 35 equivalent, being a 42-43mm-e on APS-C. For those I'd recommend the Oly 28/3.5 or a Pentax-A 28/2.8 for compact, inexpensive & good.
Going to RF lenses will necessarily increase the cost, the only bargains in RF lenses are older 35mm and longer lenses or the Contax G lenses (which handle poorly on mirrorless)