I used to use a Nikon D810 SLR for knife photos. It made great pics. Too good for the resolution on the internet. Overkill! People are using phones and tablets to view, not 60" HD TV's.
I now use my iPhone 10. It takes really good pictures. The exposure and white balance are automatic. You can edit, crop and correct right on the phone. It is also super easy to use them in emails and on social media like Facebook and Instagram.
I use wireless transfer to drop them into a folder on my Macbook Pro for long term storage.
It's great technoligy.