Hi, my name is ***** ***** it would be my pleasure to help with your question today.
Can you tell me what specifications you are looking for in particular?
Do you need specs of the internal lens elements or a specific portion of the lens body, motor, etc.
Ken Rockwell has about the most complete specifications of the lens that is available to the public online. You can find his write up on this lens HERE
Hope this helps. Let me know if there's anything else that I can do to assist you.
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