the future of 1.2 L lenses ?
- Thread starter steliosk
- Start date
- Status
No, you're not getting away with that, Neuro!neuroanatomist said:Marsu42 said:Doesn't matter, since Nikon doesn't build f1.2 lenses for their system Canon will keep them coming... no matter if f1.2 with current sensors is really necessary or how many people actually are able to focus them wide open.
...or how much Canon has to secretly push the ISO to compensate for light lost due to the extreme oblique angle of light from an f/1.2 lens, especially since higher sensor pixel density means more push is needed.
In an earlier thread, you objected to my saying something like "secretly" about this issue, by retorting that it is explained in some documentation somewhere (I forget the link), and is therefore not a secret.
You can't have it both ways. Stop sitting on the fence. Make your mind up, and stay with it!
Upvote
0
Fleetie said:
I do sympathize imagining his conflict, I really do - being a Canon gear collector and brand loyalist means one should be inclined to be understanding of Canon's policy, at least up to some point that might change over time or between forum posts
Btw where's the documentation what Canon is doing with iso & the f1.2 lenses?
Upvote
0
L
Loswr
Guest
Fleetie said:No, you're not getting away with that, Neuro!neuroanatomist said:Marsu42 said:Doesn't matter, since Nikon doesn't build f1.2 lenses for their system Canon will keep them coming
...or how much Canon has to secretly push the ISO to compensate for light lost due to the extreme oblique angle of light from an f/1.2 lens, especially since higher sensor pixel density means more push is needed.
In an earlier thread, you objected to my saying something like "secretly" about this issue, by retorting that it is explained in some documentation somewhere (I forget the link), and is therefore not a secret.
You can't have it both ways. Stop sitting on the fence. Make your mind up, and stay with it!
You mean this thread? I wasn't objecting to you calling it sneaky, it is - Canon, Nikon and Sony certainly don't publicize it. But Canon doing it secretly doesn't mean it's really a secret. My point (objection, if you like) in that thread was the lack of novelty - someone observed the phenomenon on one thread, you replicated it, but it wasn't news - DxOMark had previously quantified the effect (on multiple brands) and published the data. Next up on new discoveries - when you focus your lens on a close subject, you're getting a shorter focal length than printed on the barrel. We can run out and do a bunch of tests to confirm that......but it might be easier to just Google "focus breathing".
Marsu42, the DxOMark data are here.
Upvote
0
neuroanatomist said:
Thanks a lot, that's really interesting...
... 1/2 stop isn't that much so fast lenses are still a valid design vs. f2.8, but this might be part of the answer why Canon recently uses IS primes instead of f1.4 - I doubt a lot of people know about this issue.
Upvote
0
It's funny I was searching for that data just the other day.
There used to be two core reasons for f1.2 lenses, light gathering, at which they always made huge image quality compromises, and very narrow depth of field. With modern iso capabilities the light gathering aspect has become less important, but the ultra narrow dof is as important as ever. Canon have always delighted in their lens selection and the speciality lenses have always been a key component of their lens system. I don't see the f 1.2's going anywhere, interesting that they have come out with a $5,000 CN-E 35 T1.5 before an EF 35mm f1.4 MkII.
There used to be two core reasons for f1.2 lenses, light gathering, at which they always made huge image quality compromises, and very narrow depth of field. With modern iso capabilities the light gathering aspect has become less important, but the ultra narrow dof is as important as ever. Canon have always delighted in their lens selection and the speciality lenses have always been a key component of their lens system. I don't see the f 1.2's going anywhere, interesting that they have come out with a $5,000 CN-E 35 T1.5 before an EF 35mm f1.4 MkII.
Upvote
0
privatebydesign said:
Is the CN-E the same optical formula as the 35L (with focus breathing removed) or is it better?
Upvote
0
- Status
