which one is better between Canon 24-105 f/4L Or Canon 18-135 STM

[nsawe]

I just wanted to check which one is better between Canon 24-105 f/4L Or Canon 18-135 STM In comparison of shots in low light and image quality with 70D[/QUOTE]

 

[jaomul]

It may be hard to find someone who uses both for a direct comparison but the 24-105mm was always on my 5d or 1d2 and i thought it was great, but is more fitting to a fullframe camera. It focussed very fast and I thought it was very sharp, however- That 18-135stm gets good reviews, has way better coverage on a crop camera such as the 70d and will be happy focussing on video which to my knowledge is a big draw of the 70d over any other canon model.

The 24-105 can be f4 throughout the range bit the 18-135 aperture goes a bit smaller to 5.6, though this is at 135mm, and likey it be at around f5 at 105mm, so in theory the 24-105 is potentially better in low light, overall though the 18-135 would be my choice here