The Lizars Challenge Dayspool Tropical is an early twentieth-century British folding plate camera, sold by the Glasgow optician and photographic retailer J. Lizars. The Tropical variant of the Challenge Dayspool was built with polished hardwood and brass fittings intended for use in hot and humid climates.

At UK auction, hammer prices for the Challenge Dayspool Tropical have ranged from around £760 to £1,100, with the two recorded saleroom results sitting at a midpoint near £930. As of today in 2026 the model is thinly traded, so what one sells for at any given sale depends heavily on the condition of the wood, brass and bellows; tropical-bodied cameras with intact leatherwork and a clean shutter command the upper end of that range, while examples with bellows pinholes or tarnished fittings are worth meaningfully less.