Sony FE 12-24mm f/2.8 GM Ultra Wide-Angle Lens

Wow! This is a fantastic lens and I always have it with me!

The FE 12-24mm f2.8 takes you from wide to extremely wide with a bright constant f2.8 aperture. It’s a lens for those who want the best wide-angle performance

I have a range of Sony’s premium lenses and I am very impress with Sony’s optics

Extreme wide angle-of-view at 12mm focal length.

Extensive weather sealing plus fluorine coating against moist and dust.

I purchased thus lens for architectural photography and also use it for landscapes

Optically this lens is incredible. It benefits from corner focusing at 12mm due to field curvature, but focused carefully, this lens is pretty sharp corner to corner at all focal lengths. It beats my 14mm GM with both lenses set at 14mm & f2.8, in terms of average sharpness across the whole frame. The prime wins for central sharpness, but has stronger field curvature. I've also compared this to 2 copies of the 24mm GM, and with the 24mm and 12-24 (set at 24mm and f2.8 as well as f4), the zoom outperforms the prime for average sharpness across the frame. That 24mm prime is known for impressive sharpness, and this zoom beats both of the copies I've had of the 24mm. It really is that good.

Very little CA, moderate vignette. My main complaint isn't about the optics, but is about what I'm assuming is software/firmware. The 12-24mm attached to my A7Riv has a red/magenta ring baked into the raws. It's pretty strong at 12mm, but not too bad by 14mm. It does not do this on my A1, and others have reported that covering up the lens contacts prevents the rings being baked into the raws with other bodies. Fix that, and it'll be perfect on all bodies (I repeat, the problem is absent on my A1, but this lens and others have the red/magenta ring baked in with my A7Riv).