Canon K35 24mm T1.4 BNCR not so sharp @ wide open 1.4

[Jack Smith]

Looks like K35 24mm t1.4 is not as sharp as 55mm and 85mm while shooting wide open. I've done comparison test between each primes and I'm not quite convinced with the sharpness of 24mm. I've sent my set to my local optician and he has confirmed that 24mm is not really that sharp compare to other primes in the set. I suspect this could be the characteristic of the lens. Does anyone here have the same issue with 24mm K35?

 

[George A.]

No.

My 24mm is as sharp as the others as far as I can tell. Never had any issues with it.

Did you check everything on that particular lens?

 

[Jack Smith]

It's quite odd as it has some sort of halo or kind of glowing around the edges. My Canon 24mm f1.4 just beat it by miles in term of sharpness.
I've talked to my optician and he has given it a clean up and realignment but it still has the same sort of issue.

 

[Jacek Zakowicz]

It looks like a flipped element, happens sometimes...