Andrew,
I would say that it depends on depreciation, but for cameras asset purchase is probably not worth it.
For an item like a small computer system with $5k hardware and $5k software being purchased right now, I would suggest assett purchase as computers are depreciable at 33% per year and software 100% in year of purchase. So you would get to depreciate $5k + $1,666 in the year of purchase for the cost of 3 months payments. You can imagine I often help people structure invoices
Not so worthwhile on getting a 3 yr asset purchase on a camera which probably has something like a 33% depreciation (I don't know) as it is basically even.
On leasing it also depends on amounts, very small amounts can have prohibitive rates as mentioned by MJ. If you want to share the amounts I could be a bit more specific. Also sometimes you can bundle recently purchased equipment in, eg a few lenses, computer, printer, etc which may help with the rate.