Slightly off topic, but I've found the RF 28-70 and RF 50 when both shot at f/2 near MFD have identical bokeh character. When choosing between the 24-70 vs 28-70, I also try to encourage people to consider 15-35 / 50 / 70-200 and forget the standard zoom altogether. Once you have the 15-35 and 70-200, you really only are missing 40-65.

I do agree with your logic on the F4 vs. F2.8. That is a big step up in price to just capture family moments. The EF F2.8 is a price alternative, however it is larger and heavier. For casual shots (travel, family, etc.) I find myself with an F4 trinity (14-35, 24-105, 70-200) more often than its F2.8 equivalent.

我現在是用28-70 重量是可以習慣的. 但如是24-70 我一定會常想如果光圈能大一點就好了…. 而且你都考慮F2了 用24-70勢必還要帶一支35或50 實質上也是沒輕多少或便宜多少. 不用28-70真的不一定要選canon. 目前手上R鏡只有28-70 配 85/1.2. 如果要退一步 我應該會選24-105配

The Comparison: Canon vs Tamron. Canon’s EF 24-70 f/2.8L II USM has been hailed as the sharpest lens of its type, but it has no image-stabilization, and it carries a hefty price tag at $2049. On the other hand, Tamron’s new 24-70 f/2.8 VC USD does have image stabilization, but the company’s optics only occasionally match the standards

Optical limits has tested the RF 24-105/f4. In summary: It shows it strong Iq at f4/24mm. With moderate barrel distortion. And pretty good IQ up to 70mm pretty much equalling the Canon 24-70 f2.8 v2 from 24 to 70 at f4. It bests the sony FE 24-70. Significantly in the corners at 24mm. Its like a 24-70 with another 71-105mm available, minus the

canon rf 24 105 f4 vs ef 24 70 f2 8