A real camera kit should last you five years of trips, holidays, and the kid's soccer games before anything on it needs replacing. That is the lens worth buying through: not what feels good in the cart, but what you'll still be using in 2030. Last year's model is almost always the smarter pick right now, because the new one just landed and the old one quietly dropped $300 to $500 at most retailers.
Autumn is the sweet spot for camera gear too. New bodies drop in late summer, so September and October are when the previous generation gets its first real markdown. That lines up nicely with a 0% intro window, which lets you pay it down over time instead of watching the balance gather dust in a savings account.
The 18 months of 0% interest is a deadline, not free money. Once it ends, any leftover balance starts picking up the regular APR, which on a card like this tends to sit in the high teens to mid-20s. If the balance is still there at month 17, throw your tax refund or any extra cash at it so the last payment is a real payment, not the start of an expensive balance.