Zhongyi Mitakon Lens Turbo V2 Adapter Focal Reducer Canon FD to M43 MFT BMPCC

From what I've been able to find online, this is pretty much the only FD-M43 focal reducer available aside from the significantly more expensive FD-M43 Speedbooster from Metabones. As a focal reducer, the Zhongyi works pretty well. It does effectively reduce the crop factor of your FD lenses (so a 28mm FD lens would go from a 56mm on a M43 sensor to around 40mm), while also increasing the effective size of your aperture by around 1 stop (less so if your max aperture is already under f2). This is useful since micro four thirds cameras tend to struggle more in low light shooting situations, so any extra amount of light you can squeeze on to the sensor is appreciated, and also because wider angle FD lenses (basically anything under 28mm) can be significantly more expensive (due to a lot of people who adapt FD to M43 seeking wider lenses to make up for the M43 crop). The Zhongyi isn't going to give you the absolute most pristine, clean image (flaring can be an issue with wider lenses, and some users report varying levels of sharpness, though I myself haven't noticed a significant different in image quality from a regular passive mount adapter), but if you are already using cheap, vintage glass on your M43 camera, perfect image fidelity is probably not your highest priority anyway - the benefits generally far outweigh the occasional dips in fidelity, at least in my opinion.ALL THAT SAID, this focal reducer may be hard pass for some due to the fact that the rod inside the adapter that is supposed to unlock the aperture of an FD lens once mounted to it simply doesn't do its job for most FD lenses. Pretty much all other FD-M43 adapters I've seen and used have a simple mechanism that allows you to adjust the angle of the rod, so after attaching a lens you can switch it to unlock the aperture, and actually adjust your f-stop. You will find that your aperture remains locked when using the Zhongyi, even with lot's of time spent fiddling to try and get the rod to catch the switch inside the lens when mounting it. Now, I have heard of a DIY fix that can be applied by applying a few layers of electrical tap around the rod inside the adapter that increases the width to catch on most lenses. If you search online, you will find other people discussing various other fixes. Whether or not that is a deal breaker is up to you, but you should be aware that out of the box, this adapter will cause you some frustration. And I was surprised to find this, as I did do a bit of research before purchasing the Zhongyi, and I didn't see any mention of this flaw.It does not look like the Metabones version of this adapter has the flaw, and the glass element is probably of higher quality anyway. The few extra hundred dollars may be worth it for absolute peace of mind, but seeing as I am a hobbyist shooter that generally shoots in relatively ample lighting situations, I'm happier with the money I save with this adapter, and the extra fiddling generally isn't a huge deal for me.