Regarding flash, you can still use a flash even though you have only one sync port on the lens.
There are two options.
- Using PC sync split cable.
You can add a Y- PC sync split cable on the PC port on the lens.
This is the Y-PC sync split cable.
https://www.amazon.com/gp/product/B0078ZCX6Y/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
Then one terminal of the split cable is connected to the main sync cable. The other terminal is connected to your flash or a transmitter. - Using PC sync OUT port on the digital back
If your digital back has a PC sync out port (Most digital backs have it.), you can connect your flash or transmitters through the out port and you can use flashes or strobes.
Note some digital backs cannot capture the flashlight if the shutter speed exceeds 1/100 when certain lenses are used. However, this isn’t a big deal if you don’t use high-speed shutters with flash indoors.
Still have a question? Contact us with your camera, digital back and sync cable.