Re: * Differences between good and bad focal reducer...: Fujifilm X System / SLR Talk Forum: Digital Photography Review
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Amazon.com : Pixco Pro Focusing Infinity Speed Booster Focal Reducer with Optical Glass Adapter Lens Turbo M42 Mount Lens to Micro Four Thirds M4/3 : Electronics
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Zhong Yi Optics announces Turbo adapters for DX Nikon Z cameras that reduces crop factor: Digital Photography Review
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