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The 70-200 VR S dilemma

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Mizoka41

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The lens back element is moved forward to give space for the TC 1.4 & 2.0, I believe this would result a less image quality loss when TC is attached.

But how about that longer flange distance compares to the other Z lenses?

Would the 70-200 S result a better image quality if it doesn't care about the TCs?

I saw a lot of people buying the lens + TC combo, maybe I'll just do the same :P
 
Mizoka41 said:
The lens back element is moved forward to give space for the TC 1.4 & 2.0, I believe this would result a less image quality loss when TC is attached.

But how about that longer flange distance compares to the other Z lenses?

Would the 70-200 S result a better image quality if it doesn't care about the TCs?

I saw a lot of people buying the lens + TC combo, maybe I'll just do the same :P
Click to expand...
I think you mean back focus distance (the distance between the rearmost lens element and the sensor) rather than flange distance. The back focus distance on a telephoto lens is usually longer than the flange distance, even on the F mount. If you look into an F mount telephoto lens from the back side, you will see the rear element is recessed into the body in most designs. Since the Z mount flange is much closer to the sensor, there is even more room between the flange and the rear element. So the accommodation of a teleconverter likely has no impact on the design of the lens.

Wide angle lenses are where the rear element gets close to the sensor, and having a small minimum back focus distance allows greater flexibility in the optical design. It has been said that the advantages of the mirrorless mount for lens design are primarily in wide angle and very large aperture designs, and not so much for telephoto.
 
Mizoka41 said:
The lens back element is moved forward to give space for the TC 1.4 & 2.0,
Click to expand...
Correct.

All F lenses which accept Nikon AF TC's are the same.

The Canon EOS system works the same way.
Mizoka41 said:
I believe this would result a less image quality loss when TC is attached.
Click to expand...
I assume converters with protruding front elements provide the highest image quality as this is what Nikon and Canon produce.
Mizoka41 said:
But how about that longer flange distance compares to the other Z lenses?
Click to expand...
None of my 6 other Z mount lenses have space for a protruding front element converter.

Right now only the 70-200S accepts the Z converters.

Whether the Z mount 105 macro, 100-400 and 200-600 in the Roadmap will accept the Z converters has not been clarified by Nikon.
 
Mizoka41 said:
The lens back element is moved forward to give space for the TC 1.4 & 2.0, I believe this would result a less image quality loss when TC is attached.

But how about that longer flange distance compares to the other Z lenses?

Would the 70-200 S result a better image quality if it doesn't care about the TCs?

I saw a lot of people buying the lens + TC combo, maybe I'll just do the same :P
Click to expand...
The rear element of any lens is not restricted to the very rear of the lens. If you have the 24-70 f4 look at the rear element. turn the zoom ring and watch the rear element disappear inside the lens barrel from 24mm to 70mm, rear elements are placed where they work best for each lens design, For wide angles they can now that the mirror has disappeared, they can be in their best position closer to the sensor, telephoto's were in general always in the correct position sometimes 100mm or so away from the sensor. removing the mirror does not affect their design.
 
ZapperVT said:
Mizoka41 said:
The lens back element is moved forward to give space for the TC 1.4 & 2.0, I believe this would result a less image quality loss when TC is attached.

But how about that longer flange distance compares to the other Z lenses?

Would the 70-200 S result a better image quality if it doesn't care about the TCs?

I saw a lot of people buying the lens + TC combo, maybe I'll just do the same :P
Click to expand...
I think you mean back focus distance (the distance between the rearmost lens element and the sensor) rather than flange distance. The back focus distance on a telephoto lens is usually longer than the flange distance, even on the F mount. If you look into an F mount telephoto lens from the back side, you will see the rear element is recessed into the body in most designs. Since the Z mount flange is much closer to the sensor, there is even more room between the flange and the rear element. So the accommodation of a teleconverter likely has no impact on the design of the lens.

Wide angle lenses are where the rear element gets close to the sensor, and having a small minimum back focus distance allows greater flexibility in the optical design. It has been said that the advantages of the mirrorless mount for lens design are primarily in wide angle and very large aperture designs, and not so much for telephoto.
Click to expand...
Thanks a lot for the knowledge, learned a lot
 
To be fair only Nikon's pro 70-200 can be used with TC's unlike Canon EOS RF version - only their 600, 800 F11's can use their new tc's, a bit of big failure by Canon (They would have to use a EF TC, EF to R adaptor and an EF 70-200 F2.8 lens) and one that Nikon should be trumping up how good and versatile their new pro glass is.

Hopefully Nikon will give us more info on which lens going forward are compatible with their new Z TC's - imagine that it could be 100-400, 200-600, 105 Macro and maybe later a 70-200 F4 Z
 
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