Not everyone need f1.4. Many of my friends keep asking me, the VM24-90 is large and heavy(compare to Nikon, Canon, Sony FE) and how about the image quality and the image resolution ? No one will question the image quality of the prime lens SL-50/1.4. So base on my test, I will tell my friend that for a zoom lens, VM24-90 is good enough, the corner might be a little bit soft but it's convenience.
SL + Summilux-SL 50/1.4 wide open