What the thread found

• A custom adapter converting from 1/2 inch hole to 5/8 inch pin can be fabricated by a local machine shop using stainless steel for durability
• Standard light stand adapters may not be suitable for Steadicam use as their pin geometry differs from purpose-built Steadicam connections
• The 1/2 inch pin specification on an A30 arm may create structural concerns if subjected to significant leverage loads when adapted to accept a larger 5/8 inch connection

Depends on

• The appropriateness of custom adapters for this specific arm-to-sled connection remains uncertain
• No commercial adapter for this exact configuration (1/2 inch female to 5/8 inch male) appears to be readily available in the market
• The discussion was never fully resolved regarding whether the original poster successfully implemented a working solution

Gear in this thread

Zephyrcatalog

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