How to deduct money not from profits put into the business

Hello everyone,

So I started my photography business at the beginning of this year in the USA. It's a single-member LLC disregarded entity. I created a business checking and saving account. So far, I have made over a thousand dollars in profit, currently sitting in the business bank account. In a little over a month, I would like to buy a new camera and gear for my business which would run a little over four-thousand dollars. I was planning on putting five-thousand dollars into my business bank account from my personal account and calling it equity. Then purchasing the camera using my business account and writting it off at the end of the year as a business expense. Would I write that on schedule C form? And if so, how does it work, writting the camera off as a business expense but showing that the money I put into the account was not profit from my business? Thank you