FS: Alpa Adjustable Back Adapter H1A

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I have a used Alpa adjustable H1A back adapter for Hasselblad H interface. It's in excellent condition with minor signs of use. New replacement costs over $1300, and I hope to get $800 net. Additional shim kit can be purchased for about $20 from fotocare, which allows max +/- 3/10 mm adjustment for digital backs.