Review + Unboxing YONGNUO 25mm f1.7 AF Prime Lens Olympus OM-D E-M1 MII vs Lumix G2 Camera Class 175 

Have the AF & metering issues with Olympus bodies already been resolved? Since it has no USB port for firmware updates, I was hoping the newer manufactured units already has newer firmware to solve the issues you have noticed. I'm planning to use it on my new OM-1 Mark II body.

@@Angus.MacGyver How to install firmware Obtaining the new firmware will start with you downloading it from your camera’s in-country website. While most cameras are from Japanese companies, there will be a separate distributor in each major country or region. Typically the best place to get your firmware is from your in-country distributor. However, if you want, it’s no problem to go to another countries distributor to find the firmware. Most companies (Canon, Nikon, Fujifilm, Panasonic, Pentax, Leica) will have you start by downloading the update to your computer. The firmware is usually loaded into a larger folder or package with additional files that may explain the process. Opening the downloaded file will usually reveal the actual firmware file. The next step is to move the firmware onto an empty memory card. This is where owning a card reader will come in very handy. The best practice would be for you to first format the memory card in the camera that you are about to update. Be sure to move any important data off the memory card first, as formatting will delete all photos on the card. You can then copy the firmware file onto your memory card, via a card reader. Once the firmware is on the memory card you’ll need to put that memory card into the camera. It’s probably best not to have any other memory card in the camera at this time. You’ll then need to find the “firmware” setting in your menu. Enter the firmware feature in the menu and the camera should recognize that you have new firmware on the memory card. There may be a prompt or two for starting the firmware update process. You’ll need a mostly full battery or the camera may not allow you to go through with the process. Stopping mid-update is a recipe for disaster. Do not interfere with the update process or you may be sending your camera in for repair. Do not - take the memory card out, turn the camera off, take the battery out, or press any button until prompted to do so. The firmware updating typically takes a few minutes, and will notify you when it is done. At that point it would be wise to turn the camera off, back on, check to see that the firmware was indeed updated, and then format the memory card again; clearing the firmware off the camera, so that you can use the memory card again for storing photos.

@@CarmineTavernaPhotography But there is no way for the user to update the lens firmware for this lens because it has no USB port or USB lens dock as far as I know. I don't know if Yong Nuo accepts lenses sent to them for firmware updates, if there is any available.

Glad it was helpful!