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Baader Semi APO Filter
Filter thread pitch for Nikon 200-500 ?: Nikon SLR Lens Talk Forum: Digital Photography Review
Fotodiox Lens Mount Adapter - M39/L39 (x1mm Pitch) Screw Mount Russian – Fotodiox, Inc. USA
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Amazon.com : Metal M35 Male to M35-T2 mm Female 35mm 1mm Thread Pitch to T2 42mm 0.75mm Thread Pitch 35mm-42mm Step-Up Coupling Ring Adapter for Lens Filter : Electronics
Measuring threads
Cokin P-Series 58mm Adapter Ring (0.75mm Pitch Thread) - Green Mountain Camera
Macro Reverse Ring for Fuji - Camera Mount to Filter Thread Adapter fo – Fotodiox, Inc. USA