I'm no tax expert, maybe someone else can answer this.
If u spend 2000 on camera gear, but had an income of $1500 from using it, is that actually income? Since you're still in the hole $500
No, you usually cannot write off business expenses for camera gear until you've really started making money from it. As a hobbyist, I've heard it is around 3 years of profit before you can write anything off.
No writing off business expenses, but they sure do expect you to write ON any business profits for taxing!
Do NOT write off your camera until you've talked to an accountant, I am no expert!