Okay, you picked up a Zfc (and maybe my book on it). What next?
- Get a Grip. Literally. The Smallrig Hand Grip fixes the biggest flaw of the Zfc, which is that it becomes problematic to handle as you start putting larger or longer lenses on it. While there are other options here, I like the Smallrig one because it combines a lot of functions together (e.g. Arca-style plate), and gives you a nice point to mount something like a microphone for vlogging.
- Buy extra batteries and a two-battery charger. Yes, the Zfc has USB Power Delivery, but no, that isn't always convenient to use during a full day of travel. I usually get by with two batteries a day, but keep a third charged spare just in case. Now that third-party EN-EL25 batteries are available, the cost of adding a battery or two to your bag just went down. I've only verified that the Kastar version works, thus it's the only one I link to right now. Why a two-battery charger? Because I've found that I often completely deplete one battery and partially deplete another. It's just more convenient to put both on the same charger and let the charger do its thing.
- Consider the Viltrox lenses. I'll be providing reviews of all the autofocus Viltrox lenses, but the short version is that these lenses give you some nice options, and the addition of an aperture ring ought to give you dial fans' hearts a little flutter. You have a choice of 13mm, 23mm, 33mm, and 56mm f/1.4 primes, all of which provide you more low light capability while staying appropriately DX sized. They are a little on the heavy side, being all metal, but still, they balance well on a camera with a grip, and you just got a grip.
- Buy an ML-L7 or equivalent. Yes, you can trigger the camera via SnapBridge, but sometime's it's just more convenient to have a pocket remote. Now that we have third-party alternatives, it's not an expensive option to have in your bag.
- Get a flash socket cover. Nikon doesn't supply one, and you really don't want moisture to get to any contacts on the camera, ever. You can even get a cover with a bubble level in it, which is useful. An inexpensive way to just add a little protection to your camera.
