Balance your tele lens - The tripod mount ring mount on the tripod, it helps you fix and balance your tele lens which is heavy or long lens hanging off the front of camera.
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Upgraded base plate - Upgraded base plate is designed with four 1/4" & one 3/8" thread holes,
- Compatible with Arca-Swiss standard dovetail plate.
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Strong construction - Right weight and strong building by third party.
- 100% fits for Sigma and does have same construction.
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