Z lenses

mlgray12 wrote:image quality I think is  improved using the 1.4x with the 500 PF on the  Z7 over the D850

E.J. Peiker wrote:

mlgray12 wrote:image quality I think is  improved using the 1.4x with the 500 PF on the  Z7 over the D850

That is due to the fact that you are using the sensor to do AF rather than an off sensor AF system in your D850 which is really only dead accurate at whatever distance, temperature, and light source that you did your AF Fine tune with (assuming that you did calibrate it).  If you didn't calibrate the lens to your DSLR, then there is almost 0 percent probability that it is as accurate as can be.  I have literally done hundreds of 500PF lenses with D4/D5, D850 and D500 cameras and exactly zero of them required no AFFT value change.

mlgray12 wrote:

E.J. Peiker wrote:

mlgray12 wrote:image quality I think is  improved using the 1.4x with the 500 PF on the  Z7 over the D850

That is due to the fact that you are using the sensor to do AF rather than an off sensor AF system in your D850 which is really only dead accurate at whatever distance, temperature, and light source that you did your AF Fine tune with (assuming that you did calibrate it).  If you didn't calibrate the lens to your DSLR, then there is almost 0 percent probability that it is as accurate as can be.  I have literally done hundreds of 500PF lenses with D4/D5, D850 and D500 cameras and exactly zero of them required no AFFT value change.

EJ - thanks I actually have all the gear to fine tune my lens but in this case I did not - just being lazy - I should have mentioned that - my 500 seems to be pretty accurate without Tc's and I saw same thing with all my older big glass like the 600 f/4 and 400 f/2.8 always needing to do lots more correction with TC's
That is another reason really like mirrorless - Is there any reason to actually fine tune when using a mirrorless camera like a Z7 - They still have that capability which not sure what it corrects when focusing is done on sensor
Mike

E.J. Peiker wrote:The Z lenses are across the board much better due primarily to the straighter light path to the sensor enabled by the much wider mount, as well as that they are all much newer designs.  So, IQ is better with every Z lens than it is with it's F-mount equivalent.  Additionally, AF will be faster.  That's not to say that you can't get good results using F-mount lenses via the adapter but for equivalent lenses, the Zs will be better.  The wider the lens, the more noticeable it will be due to the straighter lightpath.  For example if I were buying a Z system but could only get 2 of the 3 "trinity" lenses (14-28 or 16-35, 24-70, and 70-200), I would get the Z version of the wide and standard lens and use the F-mount 70-200 until I could replace it at a later date.  Hope that helps.

E.J. Peiker wrote:

mlgray12 wrote:

E.J. Peiker wrote:

mlgray12 wrote:image quality I think is  improved using the 1.4x with the 500 PF on the  Z7 over the D850

That is due to the fact that you are using the sensor to do AF rather than an off sensor AF system in your D850 which is really only dead accurate at whatever distance, temperature, and light source that you did your AF Fine tune with (assuming that you did calibrate it).  If you didn't calibrate the lens to your DSLR, then there is almost 0 percent probability that it is as accurate as can be.  I have literally done hundreds of 500PF lenses with D4/D5, D850 and D500 cameras and exactly zero of them required no AFFT value change.

EJ - thanks I actually have all the gear to fine tune my lens but in this case I did not - just being lazy - I should have mentioned that - my 500 seems to be pretty accurate without Tc's and I saw same thing with all my older big glass like the 600 f/4 and 400 f/2.8 always needing to do lots more correction with TC's
That is another reason really like mirrorless - Is there any reason to actually fine tune when using a mirrorless camera like a Z7 - They still have that capability which not sure what it corrects when focusing is done on sensor
Mike

No point at all in doing the fine tune on a mirrorless camera unless you purposely want to force a lens to front or back focus for some reason.  Do they even have AFFT in the menus on the Z cameras?  I don't have one to check.

Brian K. wrote:

E.J. Peiker wrote:The Z lenses are across the board much better due primarily to the straighter light path to the sensor enabled by the much wider mount, as well as that they are all much newer designs.  So, IQ is better with every Z lens than it is with it's F-mount equivalent.  Additionally, AF will be faster.  That's not to say that you can't get good results using F-mount lenses via the adapter but for equivalent lenses, the Zs will be better.  The wider the lens, the more noticeable it will be due to the straighter lightpath.  For example if I were buying a Z system but could only get 2 of the 3 "trinity" lenses (14-28 or 16-35, 24-70, and 70-200), I would get the Z version of the wide and standard lens and use the F-mount 70-200 until I could replace it at a later date.  Hope that helps.

E.J.,

This is very interesting. Would you say this is generally true for all new, larger mounts like the Canon RF mount? 

Brian

E.J. Peiker wrote:

Brian K. wrote:

E.J. Peiker wrote:The Z lenses are across the board much better due primarily to the straighter light path to the sensor enabled by the much wider mount, as well as that they are all much newer designs.  So, IQ is better with every Z lens than it is with it's F-mount equivalent.  Additionally, AF will be faster.  That's not to say that you can't get good results using F-mount lenses via the adapter but for equivalent lenses, the Zs will be better.  The wider the lens, the more noticeable it will be due to the straighter lightpath.  For example if I were buying a Z system but could only get 2 of the 3 "trinity" lenses (14-28 or 16-35, 24-70, and 70-200), I would get the Z version of the wide and standard lens and use the F-mount 70-200 until I could replace it at a later date.  Hope that helps.

E.J.,

This is very interesting. Would you say this is generally true for all new, larger mounts like the Canon RF mount? 

Brian

Yes, absolutely, the Canon RF lenses blow the doors off of the equivalent EF lenses.

E.J. Peiker wrote:

Brian K. wrote:

E.J. Peiker wrote:The Z lenses are across the board much better due primarily to the straighter light path to the sensor enabled by the much wider mount, as well as that they are all much newer designs.  So, IQ is better with every Z lens than it is with it's F-mount equivalent.  Additionally, AF will be faster.  That's not to say that you can't get good results using F-mount lenses via the adapter but for equivalent lenses, the Zs will be better.  The wider the lens, the more noticeable it will be due to the straighter lightpath.  For example if I were buying a Z system but could only get 2 of the 3 "trinity" lenses (14-28 or 16-35, 24-70, and 70-200), I would get the Z version of the wide and standard lens and use the F-mount 70-200 until I could replace it at a later date.  Hope that helps.

E.J.,

This is very interesting. Would you say this is generally true for all new, larger mounts like the Canon RF mount? 

Brian

Yes, absolutely, the Canon RF lenses blow the doors off of the equivalent EF lenses.