Canon RF 14-21mm f/1.4L USM one of the “crazy” lenses coming next year [CR1]

BillB

EOS R
May 11, 2017
1,393
659
A pro photographer I trust told me many Nikon camera owners bought it, were disappointed, and quickly sold it. There were a couple of those on the used equipment shelves of my favorite photo shop at the time, so I took his word at face value.
Disappointed with the lens is one thing. Realizing that one doesn’t have as much use for the focal length range as they thought they would is something else. South of 28mm is a strange new world for a lot of people, a world they find they don’t spend that much time in.
 

Michael Clark

Now we see through a glass, darkly...
Apr 5, 2016
3,089
1,807
But, wide open, it's a very disappointing lens...
As is pretty much every 24mm f/1.4 from anyone. Just ask Uncle Roger. In this blog entry he says, "We specifically chose 24mm f/1.4 lenses for this example because they are complicated and are very difficult to assemble consistently." He echos that sentiment in this more recent blog entry: "At first glance, you may be a little underwhelmed by the MTF, but let me point out that 24mm f/1.4 lenses are almost always the most difficult primes to design and make and don’t generally have great MTF curves."
 
Last edited:
  • Like
Reactions: SecureGSM

SecureGSM

2 x 5D IV
Feb 26, 2017
2,368
1,240
As is pretty much every 24mm f/1.4 from anyone. Just ask Uncle Roger. In this blog entry he says, "We specifically chose 24mm f/1.4 lenses for this example because they are complicated and are very difficult to assemble consistently." He echos that sentiment in this more recent blog entry: "At first glance, you may be a little underwhelmed by the MTF, but let me point out that 24mm f/1.4 lenses are almost always the most difficult primes to design and make and don’t generally have great MTF curves."
yup, there is a "workaround" though: Sigma 28mm f/1.4 DG HSM Art :)

 

SecureGSM

2 x 5D IV
Feb 26, 2017
2,368
1,240
Uncle Roger also says it's hard to find one of those well aligned.
Interesting. Do you recall where Uncle Roger mentioned this? modern Sigma Art glass is quite consistent from a QA perspective. The earlier models prior to the 24-35/2 Art were hit and miss for sure. The 28/1.4 is a relatively recent model
not a word on poor copy to copy variation. They test 10 copies to produce their MTF charts. Sigma 28/1.4 kills Otus 28 in the MTF department.
 
Last edited:

Michael Clark

Now we see through a glass, darkly...
Apr 5, 2016
3,089
1,807
Interesting. Do you recall where Uncle Roger mentioned this? modern Sigma Art glass is quite consistent from a QA perspective. The earlier models prior to the 24-35/2 Art were hit and miss for sure. The 28/1.4 is a relatively recent model
[/URL]
not a word on poor copy to copy variation. They test 10 copies to produce their MTF charts. Sigma 28/1.4 kills Otus 28 in the MTF department.
Sorry, I was still stuck on Sony. With Sigma the only issues I'm aware of are with AF consistency. YMMV.
 

SecureGSM

2 x 5D IV
Feb 26, 2017
2,368
1,240
Sorry, I was still stuck on Sony. With Sigma the only issues I'm aware of are with AF consistency. YMMV.
There is one serious issue with the Sigma otherwise excellent Art lenses namely: 40/1.4, 14-24/2.8, 12-24/4 - a massive focus shift.

Wide open focus is right on the money. However stopped down by two stops, focus would shift behind the subject and by a lot.
Not a problem with Sony cameras focusing stopped down. Still a problem with Canon DSLRs and mirrorless