Fotodiox 专业镜头安装适配器，Leica M39 镜头至Leica M适配器，带 Leica M8 和 Leica Digital M9 编码（50-75mm 框架）
- 优质级 Fotodiox“Pro”适配器
- “No Play”适配器
- 24 个月制造商保修
这是 Pro 系列镜头安装适配器之一，采用精密和杰出*标准。 作为所有 Pro 系列适配器，这些适配器经过精心制作，可承受专业镜片。 镜头和镜头之间没有“玩耍”。 这款镜头安装适配器具有独特的造型，可维护 / 增强专业外观。 这款镜头安装适配器允许一个 Leica 50mm/75mm M39 镜头适配于 Leica M 相机机身上，并允许相机机身上适当的视角镜边框线。 该适配器还包括 Leica 的“6 位编码”缩进，可以涂漆（黑色/白色），模拟各种 Leica M 镜片，以优化图像质量。
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I deducted one star because although the adapter works well, the tolerances aren't quite as good as they could be for an adapter marketed as "Premium Grade" with "Top Notch Craftsmanship". That's not to say this is a bad adapter, it isn't at all, but judging it against its own marketing I can't quite rate it as perfect. I compared this adapter to an older Leitz Wetzlar adapter and a generic Japanese-made adapter I bought in Japan a few years ago for slightly more than the price of the Fotodiox. The key dimension with regard to focus is the thickness of the flange. All three have an average thickness of 0.0400" with some variation at different points around the ring. The Leitz had a variation of +/- 0.0003" and the Fotodiox had a variation of +/- 0.0005". Much to my surprise, the Japanese adapter beat both of them with a variation of +/- 0.0001", despite having a lower level of finish than the other two (sharp edges, light machining marks, no red indexing notch). The other point worth noting is that the Leitz adapter is the worst of the three in terms of mounting on the camera. It fits extremely tight on my M3 and M9, and can't even lock into place on the M9 without more force than I'm willing to exert on it. So the Japanese adapter, despite its slightly inferior finish, sets the bar. I would rate the Fotodiox above my particular Letiz adapter because of the fit issues, but it's possible the lugs on that adapter are just out of spec.
Given the inherent lack of precision in rangefinder focusing and the other potential sources of error, I suspect all three of the adapters are well within the tolerances of the system. That said, the Japanese adapter proves it's possible to make a significantly more precise adapter for not much more money, so I can't quite rate the Fotodiox as a full five stars if judged by its own marketing.