CPU'd lenses don't matter too much to me either, jackass, but it is still a pretty niche market they're going after here. I think if they threw in a small chip it would help out.
A CPU'd lens is not only usable on all Nikon DSLR's, but cameras like the F100 as well.
ISO1600 wrote:
CPU'd lenses don't matter too much to me either, jackass, but it is still a pretty niche market they're going after here. I think if they threw in a small chip it would help out.
A CPU'd lens is not only usable on all Nikon DSLR's, but cameras like the F100 as well.
Non-CPU lenses work just fine on the F100 (Used to have an F100 myself, probably will own another one at some point) as well as on any Nikon body that someone willing to pay $1000+ on a lens is likely to have. It's only the low-end DSLR's and AF film bodies that need the CPU for more than enabling P and S modes.
And expensive manual focus lenses are already a niche market. The CPU adds or subtracts very little market share from the equation.
CPU'd lenses may become more and more important as camera technology advances.
For example:
Take a look at the recent thread about alt lenses vignetting on the 5D II. https://www.fredmiranda.com/forum/topic/735258/0
It doesn't happen with Canon lenses, and the cause seems to have something to do with the electronic data recieved from the lens.
It's reasonable to assume that the next generation of cameras may have even more compatibility issues with alt glass, for similar reasons.
-----------------
Another possible issue, though something I'm not sure of, yet:
The 5D II's processor has something called "Peripheral Illumination Correction." This evidently improves shadow detail on images that hit the sensor from the sides. (or something like that.) Evidently, it is pre-programmed for the most important Canon lenses, and can be user-programmed for others. (or something like that) Can it be programmed for alt glass? I'm guessing no, because the required electronic feedback doesn't exist.
Well, Canon does not seem to tolerate buyers to use any alternative lenses except when they pay the high price of their 1D series. I believe the issues with the 5D/II viewfinder, mirror box... etc. are intentional to discourage people from doing that.
Cableaddict wrote:
CPU'd lenses may become more and more important as camera technology advances.
For example:
Take a look at the recent thread about alt lenses vignetting on the 5D II. It doesn't happen with Canon lenses, and the cause seems to have something to do with the electronic data recieved from the lens.
It's reasonable to assume that the next generation of cameras may have even more compatibility issues with alt glass, for similar reasons.
-----------------
Another possible issue, though something I'm not sure of, yet:
The 5D II's processor has something called "Peripheral Illumination Correction." This evidently improves shadow detail on images that hit the sensor from the sides. (or something like that.) Evidently, it is pre-programmed for the most important Canon lenses, and can be user-programmed for others. (or something like that) Can it be programmed for alt glass? I'm guessing no, because the required electronic feedback doesn't exist.
Hmmm. I think I'll start a new thread about this....Show more →
Cableaddict wrote:
CPU'd lenses may become more and more important as camera technology advances.
For example:
Take a look at the recent thread about alt lenses vignetting on the 5D II. https://www.fredmiranda.com/forum/topic/735258/0
It doesn't happen with Canon lenses, and the cause seems to have something to do with the electronic data recieved from the lens.
It's reasonable to assume that the next generation of cameras may have even more compatibility issues with alt glass, for similar reasons.
-----------------
Another possible issue, though something I'm not sure of, yet:
The 5D II's processor has something called "Peripheral Illumination Correction." This evidently improves shadow detail on images that hit the sensor from the sides. (or something like that.) Evidently, it is pre-programmed for the most important Canon lenses, and can be user-programmed for others. (or something like that) Can it be programmed for alt glass? I'm guessing no, because the required electronic feedback doesn't exist.
Hmmm. I think I'll start a new thread about this....Show more →
Nikon's Vignetting correction on the D3 (and IIRC D700) works with non-CPU lenses.
mawz wrote:
Note that while the ZF/ZK lenses are essentially identical apart from the mount and aperture ring, the ZE lenses use nearly all new parts. The ZE's focus in the opposite direction and have a barrel designed for no aperture ring and the larger diameter EF mount as well as the electronics and stepper-actuated aperture mechanism. I doubt there's much parts commonality between the ZE lenses and ZF/ZK lenses apart from the glass and maybe the filter ring/hood mount.
It is still nuts as Zeiss is going to sell more EF mounts than K and F together
canlogic wrote:
My dealer told me he has shipping conformation on my Zeiss 21 in Canon EF mount and will have it next week.
I assume "my dealer" is also in Canada.
Yes in Montreal. He sells a lot of Zeiss and Leica and assures me the notification is for the EF mount 21. I hope it isn't a mistype on the other end. I will update here when (if) I get it, hopefully at the end of the week.
mawz wrote:
Nikon's Vignetting correction on the D3 (and IIRC D700) works with non-CPU lenses.
But not with non-Nikon non-CPU lenses, I should think. How would the body "know" what correction to apply? This forum shows that the combinations of alt lenses and adaptors to be almost infinite...
philber wrote:
But not with non-Nikon non-CPU lenses, I should think. How would the body "know" what correction to apply? This forum shows that the combinations of alt lenses and adaptors to be almost infinite...
I'm pretty sure it just analyzes the image for apparent falloff. It certainly does work with non-Nikon non-CPU lenses.
mawz wrote
I'm pretty sure it just analyzes the image for apparent falloff. It certainly does work with non-Nikon non-CPU lenses.
That would seem to be pretty difficult to pull off. How does the camera know that the corners aren't actually dark in the scene being captured -- or how much is due to the lens and how much to the scene?
Rather, I would think that the fall-off characteristics for particular lenses (at given f-stops) are measured and input into the camera and then mapped to the image to correct it.
Lotusm50 wrote:
That would seem to be pretty difficult to pull off. How does the camera know that the corners aren't actually dark in the scene being captured -- or how much is due to the lens and how much to the scene?
Rather, I would think that the fall-off characteristics for particular lenses (at given f-stops) are measured and input into the camera and then mapped to the image to correct it.
That would be impossible to do based on a table and still support non-CPU lenses. For example, which of the 3 completely different 28/2.8 designs Nikon has sold (28/2.8 AI, AI-S and E) is selected when you enter 28mm f2.8 in the non-CPU lens data.
mawz wrote:
That would be impossible to do based on a table and still support non-CPU lenses. For example, which of the 3 completely different 28/2.8 designs Nikon has sold (28/2.8 AI, AI-S and E) is selected when you enter 28mm f2.8 in the non-CPU lens data.
But it is clearly impossible to do it accurately by analyzing the image.
Quite frankly, I wouldn't think that Nikon would be overly concerned about non-CPU lenses -- they would want ot you buy new lenses and this is a feature that would provide an incentive to do so. If you have to enter a lens data for non-CPU lenses to use the feature, then it is pretty clear to me that the camera is doing it based on data it has in it memory. You might ask Nikon which 28mm lens they use -- but I suspect it would be the more recent one - even if it won't be perfect for all the versions (you want perfection, buy the new version with the CPU).
If lenses can be programmed into the Nikon database, can not falloff curves be programmed in by the user? As for the different number of 28mm lenses, can that not be controlled by the user as well? 28mm-1, 28mm-2, etc. for as large as the Nikon database allows?
StevenPA wrote:
If lenses can be programmed into the Nikon database, can not falloff curves be programmed in by the user? As for the different number of 28mm lenses, can that not be controlled by the user as well? 28mm-1, 28mm-2, etc. for as large as the Nikon database allows?
Not currently, the vignetting control is on/off only.
I suspect it's related to the CA removal feature that's in the recent CMOS-based Nikons
Don't know about other Nikon cameras but my D700 user's manual clearly states that the vignette control only applies corrections to G and D lenses. You can turn it ON or OFF. When ON you can select Low, Normal (default), High.
G-W-N wrote:
Don't know about other Nikon cameras but my D700 user's manual clearly states that the vignette control only applies corrections to G and D lenses. You can turn it ON or OFF. When ON you can select Low, Normal (default), High.
I stand corrected then, I had been previously informed that it worked on all lenses, not just D and G lenses.
canlogic wrote:
Yes in Montreal. He sells a lot of Zeiss and Leica and assures me the notification is for the EF mount 21. I hope it isn't a mistype on the other end. I will update here when (if) I get it, hopefully at the end of the week.
That is most certainly a misunderstanding. You can read on their homepage that the ZE is going to be introduced in mid '09.
