Are cameras and lenses suitable for stainless steel products, photography and tourism?

It depends on how big your product is. 18-55 is enough for traveling. If your stainless steel products are small, you can't shoot 50 heads. If it's bigger, yes. Look at your configuration, the requirements are not too high. It is better to add 18-55 and 50 1.8 for one 65438. Shooting products, generally use lights, 50 1.8 has no advantage, just use a zoom lens.