Should a Nikon 28-70mm AFS D zoom have hard focus stops?

[Peter Corbett]

Just bought a used Nikon 28-70 and noticed straight away that in manual focus, the rings meet resistance at either end of the focus throw, but with a little push the ring continues past the resistance point (infinity and close focus limits). Is this normal for this type of lens? it’s not a deal-breaker but is just a feature of the AF/MF design or something more sinister?

Peter

 

[Lee Saxon]

All AF-S lenses work this way.

 

[Richard Foster]

Lee is right. That is a characteristic of Nikon AFS lenses.

 

[James Brundige]

Just bought a used Nikon 28-70 and noticed straight away that in manual focus, the rings meet resistance at either end of the focus throw, but with a little push the ring continues past the resistance point (infinity and close focus limits). Is this normal for this type of lens? it’s not a deal-breaker but is just a feature of the AF/MF design or something more sinister?

Peter

This is correct behavior. I believe it's because infinity changes with focal length, so no hard stop is possible. It's also related to the afs system.

 

[Jiri Vrozina]

And zooms are no parfocal either. Why people do not buy cheap Red Pro17-50mm T2.9 instead ? I made a same mistake too....
I am keeping 7 Nikon Ais Primes but selling Nikons 17-35mm and 28-70mm.
How is Duclos 11-16mm matching to a new Red Pro17-50mm T2.9 ?

 

[Peter Corbett]

Thanks everyone. Just wanted to confirm it wasn't faulty. the pictures are excellent from it, so it's the trade-off against the mechanics I guess.

 

[Jiri Vrozina]

Still,
you can not use zoom....
I personally think RED Pro 17-50mm is better choice in a Long Run..

 

[Peter Corbett]

How would the Red 17-50 intercut with the Nikon zooms and primes? Would there be a noticable difference without grading?

 

[Jacek Zakowicz]

The problem is that you would need to keep switching mounts from Nikon to PL...

 

[Peter Corbett]

Yes that would be a pain Jacek. I hadn't considered that. How's that F3 adaptor coming along? (thread hijack)

 

[Jiri Vrozina]

The problem is that you would need to keep switching mounts from Nikon to PL...

That should not take too long if one uses other brand of camera.

 

[Jacek Zakowicz]

Yes that would be a pain Jacek. I hadn't considered that. How's that F3 adaptor coming along? (thread hijack)

Very well - thank you.
Couple of units in the field with raving feedback. I have the first run of 30 in the shop being machined.
Get your orders in quickly...:coolgleamA:
OK- end of hijackatriot:

 

[ALLSTAR]

How would the Red 17-50 intercut with the Nikon zooms and primes? Would there be a noticable difference without grading?

You can choose A-mount system to work with different type of lenses. It won`t need to spend time to switch mount and get real PL-style lock when using Nikon lenses, it's solid and accurate.
http://reduser.net/forum/showthread...DONE-approved!&p=549914&viewfull=1#post549914

 

[Peter Corbett]

You can choose A-mount system to work with different type of lenses. It won`t need to spend time to switch mount and get real PL-style lock when using Nikon lenses, it's solid and accurate.
http://reduser.net/forum/showthread...DONE-approved!&p=549914&viewfull=1#post549914

Wrong forum (!) , but have got to that Sony F3 version of the A-mount?