Cuenca has a high altitude, and so for this I recommend layers and some warmer options in general. (My visit was in February, but still it´s a point worth noting in general). The helpful tourist office adviser was shocked at our suggestion of sleeping overnight in the car, and thankfully pointed us towards a cheap pensión for which we were very grateful by the time we got back later that evening.
Photo Equipment: There are lovely photo opportunities all over this town - especially up in the casco viejo - old town - where you will have great views across the mountainside and surrounding landscape.
Don´t miss the night views here too.... including coloured lights shining onto the rocks...
Miscellaneous: Good walking shoes if you have any intention of seeing the casco viejo and it´s sights (cathedral, parador, casas colgantes - hanging houses etc...) ....which I highly recommend!
Clothing/Shoes/Weather Gear: Even if the sea is far away, when the heat hits tough, you will want to go for a swimm in the river Júcar, just in the middle of the city.
Clothing/Shoes/Weather Gear: Hiking possibilities around Cuenca are almost ilimited. That is the best way to get to know the canyons, lakes, reservoirs, lost villages and all the secrets to discover in this forgotten area.