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Kirk NC-300PF Replacement Lens Collar for Nikon 300mm f/4 E PF ED VR, 70-200mm f/4 G ED VR at KEH Camera
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Amazon.com : iShoot Lens Tripod Mount Ring for Nikon RT-1 Nikkor AF-S 300mm F/4E PF ED VR and 70-200mm F/4G ED VR -with Quick Release Plate : Electronics
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iShoot Lens Tripod Mount Ring for Nikon RT-1 Nikkor AF-S 300mm F/4E PF ED VR and 70-200mm F/4G ED VR -with Quick Release Plate : Electronics - Amazon.com
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