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New 50 1.8 STM questions

Started Sep 14, 2015 | Questions thread
MayaTlab0 Senior Member • Posts: 2,985
Re: New 50 1.8 STM questions

mbv wrote:

1. When focusing manually there is a sound (not loud, but still well audible) like there is a tiny gear train spinning. Is this normal? My other two STMs 10-18 and 55-250 are absolutely silent. Although I understand that they are internal focusing while 50 1.8 is focusing by extension, I did not expect this.

Yes. These two other STM lenses use a different AF mechanism. It's still STM, but it's different. Just like the 50mm f1.4 USM isn't exactly the same as usual USM lenses.

More info here :

http://www.usa.canon.com/cusa/consumer/standard_display/Lens_Advantage_Perf#usm

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mbv
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