“What is the focal length and speed (f-number) of the lens? Thanks.”
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I thoroughly searched the instructions and it does not say focal length and speed. You can turn the front of the lens to fine tune focus. Here is some technical support info that you can use to (hopefully) extract the answer from Aluratek: E-Mail: [email protected] Web: www.aluratek.com/helpdesk Local (Irvine, CA): 714-586-8730 Toll Free: 1-866-580-1978 Hope this helps.
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