eravedesigns
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Hey TPF,
I was wondering does the sigma HSM lenses and Canon USM lenses really help with speed or is it just something the companies advertise. I always thought and was told that USM and HSM was all about a quite lens and not so much speed.
Thanks
I was wondering does the sigma HSM lenses and Canon USM lenses really help with speed or is it just something the companies advertise. I always thought and was told that USM and HSM was all about a quite lens and not so much speed.
Thanks