ACH
Achromatic / Achromat
ADC
Analog-to-Digital Converter
ADC
Atmospheric Dispersion Corrector
ADU
Analog-to-Digital Unit
AF
Autofocus
ALT-AZ
Altitude-Azimuth
AP
Astrophotography
APO
Apochromatic / Apochromat
APP
Astro Pixel Processor
APS-C
Advanced Photo System type-C
ASCOM
Astronomy Common Object Model
ASTAP
Astrometric STAcking Program
AU
Astronomical Unit
CCD
Charge-Coupled Device
CLS
City Light Suppression
CMOS
Complementary Metal-Oxide Semiconductor
DOB
Dobsonian
DSLR
Digital Single-Lens Reflex
EAA
Electronically Assisted Astronomy
EAF
Electronic Automatic Focuser
EFW
Electronic Filter Wheel
EP
Eyepiece
FITS
Flexible Image Transport System
FPN
Fixed Pattern Noise
FPS
Frames Per Second
FWHM
Full Width at Half Maximum
GEM
German Equatorial Mount
HFR
Half-Flux Radius
HII / H II
Ionised Hydrogen
IC
Index Catalogue
IFN
Integrated Flux Nebula
INDI
Instrument Neutral Distributed Interface
Open-source framework for controlling astronomy equipment
IR
Infrared
L
Luminance
LED
Light-Emitting Diode
LPR
Light-Pollution Reduction
LRGB
Luminance, Red, Green, Blue
LST
Local Sidereal Time
M
Messier
MAK
Maksutov
MCT
Maksutov-Cassegrain Telescope
Mono
Monochrome
NCP
North Celestial Pole
NGC
New General Catalogue
NINA
N.I.N.A.
Astrophotography control and automation software
NR
Noise Reduction
O-III / OIII
Oxygen-III
OSC
One-Shot Colour
PE
Periodic Error
PEC
Periodic Error Correction
PHD2
Point Here Dummy 2
Guiding software for astrophotography
PI
PixInsight
PIPP
Planetary Imaging Pre-Processor
PSF
Point Spread Function
RAW
Raw Image Data
RC
Ritchey-Chrétien
RGB
Red, Green, Blue
ROI
Region of Interest
S-II
Sulphur
SCP
South Celestial Pole
SCT
Schmidt-Cassegrain Telescope
SER
SER video format
SHO
S-II, H-alpha, O-III
SQM
Sky Quality Meter
ST-4
ST-4 Autoguider Interface
TDI
Time Delay Integration
UHC
Ultra High Contrast
UT
Universal Time
UV
Ultraviolet
WL
White Light