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Next PLM lenses

Started Feb 11, 2017 | Questions thread
walgarch Regular Member • Posts: 331
Re: Next PLM lenses

tosiva wrote:

I am interested to see any information (official) which says PLM is for light lenses only. I have read only 'maybe' posts. Thanks

Just to add more data to the mix. Roger Cicala or LensRentals fame also came to the same conclusion (although he admits he's speculating):

https://www.lensrentals.com/blog/2016/04/a-look-at-electromagnetic-focusing/

Why more motors? There must be a good reason because three or four motors has to be more expensive than one or two. I assume the most likely reason would be more power to move a larger element. If my understanding is correct, LEM motors are fast and silent, but not as powerful as a DC motor.

It appears, at least for right now, that single LEMs are most suitable for small, light, focusing elements that don’t have to move very far. Bigger elements probably need multiple motors. LEMs may use less electrical power than USM motors, but I don’t know if this would be significant enough to extend battery life

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Will
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 walgarch's gear list:walgarch's gear list
Pentax K-1 Tamron SP AF 70-200mm F/2.8 Di LD (IF) MACRO HD Pentax D FA 24-70mm F2.8 ED SDM WR Pentax FA 15-30mm F2.8 Fujifilm X100S +9 more
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