Have you taken a look at some of the Apollo mission photos I posted yesterday? The photos taken in space with Hasselblad 500 bodies all have crosshairs on top of the image. Have you ever wondered why? Well, it’s because the Hasselblads used in space all had what’s called a reseau plate installed. The plate has crosshair markings meant for precise measurements and alignment. If you’ve ever seen a NASA photo with crosshairs that are not in the “+” upright alignment, that means the image has been rotated (most likely for corrections in horizon line).