# Common Astrophotography Terms **Sub-Exposures** - where you take a bunch of photos at certain exposures to get the most detail out of a processed photo! **Image Stack** - a merge of usually 32 - 300 photos at slightly different [[Exposure and ISO (Personal)#Exposure - No, not that kind!|exposures]] (sub-exposures) in order to highlight details and create a photograph with depth. **Electronically-Assisted Astronomy** - The use of apps and external control devices (such as the ZWO ASIAIR) to minimise time taken to set up a telescope, polar-align, and do whatnot. # Common Photography Terms **Aperture** - the ratio of the light that can be let through by a camera. For more on that check out [[Aperture (Personal)|the dedicated document]]! **Exposure** - generally speaking, the *total amount of light that reaches your camera's sensors*. For more check out [[Exposure and ISO (Personal)#Exposure - No, not that kind!|the dedicated document]]! **ISO** - # Not-So Common Astrophotography Terms - **Herschel Wedge** - ****