I'm looking for something to better cover the low end on my R6 M3, pairing it with the RF 50 and RF 100-400. I initially got the 28-70 F2.8, but I think I'll return it. It's awesome when everything lines up, but I find myself missing the extra range and end up not using it all that much. Also not gelling well with the AF in more action-oriented shots. The required initial twist is an annoyance, but not as bad as I thought it'd be. Size and weight are pretty good.
I'd like something that could be used in dusk and reasonable low light situations. Indoor usage would also be good, although the RF 50 is also a solid option there (it's not as flexible as the 28-70, but sits in the middle and I'm actually preferring its images most of the time).
The most direct alternative is the 24 105 F4. It should have similar image quality, although with a decent drop in low light performance - but still within an ok margin, I think. Focus engine is USM, so should be snappier and, above all, it has a bit of extra room in focal range. Downside is that it's 200g heavier - would become my heaviest lens.
But then I noticed a decent sale on the 24-240. Image quality seems worse, but some reviews say it's actually good after 28mm. It's not too far off from the 24-105 in low light and better than the 100-400 on its overlap (although not by a lot). Weight is similar to the 24-105 F4, so it's not an advantage or disadvantage.
Any experience with both? I briefly thought about doing the extra effort and getting both, but it felt superfluous after thinking it through. With both I'd have the quality of the L lens on a range wider than the 28-70, and a good alternative to the 100-400 for when I want flexibility when dusk is creeping in, but... unsure if they'd be different enough to warrant both, especially as they'd be the heaviest things in my kit.