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Autofocusing an M lens?


kcnarf

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But you are ignoring the primary point I am trying to make. Why should I, or anyone else, want a Heath Robinson* means to autofocus a lens that a) is not designed for autofocus and B) focusses very nicely thank you by manual means? Contax didn't find it a runaway market success with the AX - why should anyone else? It's putting tits on a bull.

 

If you want an AF rangefinder, start with a system designed for it just like Contax did... Oh, hang on, that didn't survive either, did it...?

 

*"Rube Goldberg", for those not in the Free World.

 

Regards,

 

Bill

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But you are ignoring the primary point I am trying to make. Why should I, or anyone else, want a Heath Robinson* means to autofocus a lens that a) is not designed for autofocus and B) focusses very nicely thank you by manual means? Contax didn't find it a runaway market success with the AX - why should anyone else? It's putting tits on a bull.

 

If you want an AF rangefinder, start with a system designed for it just like Contax did... Oh, hang on, that didn't survive either, did it...?

 

*"Rube Goldberg", for those not in the Free World.

 

Regards,

 

Bill

 

So if Bill doesn't approve it can't be wortwhile?

Nikon did OK putting tits on a bull.

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I have to say Bill that your "Free World" references seem out of place here. Besides, how free would your world be if it weren't for the US? So are you just posting that statement to be provocative or is there some point you are getting at with it?

 

The Contax AF moving sensor system was a bit of a kludge because it required basically an entire camera to move inside of an exterior "shell," If a camera has no shutter or reflex system and can simply move the sensor this would be a very elegant solution for AF that would not require what you call, a lens that was designed for auto focus.

 

As far as I know the only thing required in a lens "designed for auto focus" is some kind of motor or coupling that moves some or all of the elements. The focusing mount of all Leica M lenses (other than floating element models) only serves to move the entire optical assembly forward and back. This is identical in function to moving the sensor forward and back so there is nothing "Rube Goldberg" about it. Your negative aspersions without proof and put downs are unwarranted. As a matter of fact, it would be vastly simpler than incorporating motors in all of the lenses. (Long lenses and moving element ones would still need motors or a rough manual setting before using AF.) From a technical standpoint, moving the optical plane to focus is a better method than moving the lens because it does not alter the magnification ratio.

 

Of course this entire concept depends on the elimination of the focal plane shutter. But since Nikon has shown that is possible, there is nothing holding it back at least with that sensor. (It would also work with lenses that have leaf shutters.)

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The auto-focus Leica will be a Panasonic with full frame sensor and Panasonic lenses branded Leica. No moving sensor. A larger camera. Prepare for a paradigm shift.

 

I'll stick with manual focus, from M3 to M9, thank you.

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I doubt that Panasonic would develop full frame digital sensor on its own accord, why would they? Perhaps somebody can offer explanation or link to such rumour.

 

Assuming Leica and Pana decide to join forces and jointly develop underpinning for the future AF system camera with "at least size APS-C sensor" than this may happen. It may well be future M10. Than Leica can blow its trumpet how its new camera is best thing since sliced bread and Pana will probably get all the usual derision on LUF for its inferior counterpart costing half of the M10.

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