1 : what kind of photography or videography do you want to do? That will heavily influence the two follwing questions. If you want to do some video work mostly, then you're not going to buy the same camera as if you wanted to do wildlife photography or street photography. The answer to this question could also be "I don't know", at which case, you'd need to search for a jack of all trades camera system, that wouldn't be the best in anything, but would allow to dip your toes in pretty much everything.
2 : What is the maximum budget that you're allowing yourself to spend on camera + lens(es) + eventual accessories.
3 : do you want to buy new or are you okay buying used? Lots of deals to be made if you buy used, and you're generally able to get much better value for your money with used gear, if you're okay with not having a store warranty. The answer to that questions has high chances of being influenced by the answer to question 2. If you have a budget of 1000€ but want to get involved with wildlife photography, going with used gear is almost exclusively the answer.
4 : are there any brand preferences that would sway you one way or another?
5 : I haveno 5th question.
I have helped people getting their first cameras for several years, I might have helpes maybe several hundreds of people, either online (mostly in discord servers) or in real life, through friends, friends of friends or directly at stores.
I was always able to get to what they needed with the previous 4 questions, and I haven't had a single bad feedback from someone that would get a camera and later find that it's not really fitting what they want to do.
Recommendatiosn have gone from the tiniest micro four thirds cameras costing barely more than a hundred bucks to Canon / Nikon DSLRs and even high end medium format cameras.
Now, if it was for someone that wanted to upgrade their cameras, the process is simpler : they already have experience with a camera, so they know what they want. It's only a matter of answering the one question : what is the most cost effective way to fill your needs?
Sometimes, the needs aren't far from what the person already have, so it's only a matter of staying in their current lens / camera system and upgrade the part that needs upgrading (lens, or camera, depending on the needs).
Sometimes, the most cost effective way to fit their needs is to change system, because the way to fill their needs while staying in their current system would be completely impractical budget-wise. For example : someone was shooting with a Fuji GFX50S camera and wanted to get into sports and wildlife. At first you think, well go get that GF 500mm lens, but then you realize that not only is that lens expensive as heck, the camera is also really slow for both shooting and autofocusing, so shooting wildlife or sports with such a setup, even if it is the right lens, would be a test of patience and frustration, to the point where the camera would need to be upgraded as well, with something like a GFX100II or 100SII. In other words, very expensive. That person ended up selling the GFX, and got a Sony A7RIII + a long lens and has been happy since.
When it comes to my own needs, I have a set of criteria that I want to have filled for a camera to get on my wishlist :
- needs to be weather sealed
- needs to have IBIS
- either double SD, or a more reliable storage format than SD cards (like CFXB cards)
- needs to shoot at least 8 frames per second (more is better)
- needs to have decent image quality (APS-C 24MP sensors are more than enough, it needs to be in the viccinity when it comes to performance. Better is always welcome).
- needs to have a decent lens ecosystem that allows 3rd party lenses, and it needs to be able to adapt Nikon F mount lenses (as I have a lot of glass in both of those mounts, so cameras like the Pentax K1 for example, are out)
If any of those points id not what the camera has, it does not become my main camera. The rest is a mix of cost / performance ratio, do I like the system subjectively, do I like shooting with the camera ergonomically, does it look nice (not hideous), that kind of things.