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Guide to guiding with phd guiding

A Guide to PHD Guiding Copyright ? Greg Marshall Introduction PHD Guiding from Stark Labs has to be the most popular guiding software in use today That's partly because of the price free but it also happens to be a darn good guiding tool But even if it came with excellent documentation it does not there would still be a need to explain many of the functions and settings of PHD especially for the beginner This guide to guiding was created to ?ll that void Portions of this text are lifted directly and without shame but with permission from notes created by Neil Heacock It is based on PHD Guiding version Some features may be di ?erent for other versions First Steps When PHD Guiding is launched it does not automatically connect to your camera or mount Make sure your guide camera is connected and powered on then click on the camera icon in the lower left corner to bring up a list of supported cameras and select your guide camera from the list Depending on the type of camera you might be prompted to select some options To connect to your mount ?rst select it from the menu The choices are ASCOM GPUSB GPINT at various port addresses or on- camera meaning a guide port built into the guide camera if available ASCOM is used to connect to a mount through a software driver that is compliant with the ASCOM standard GPUSB and GPINT are hardware devices accessed via a USB port or parallel port respectively that connect on the other side to an ST- compatible guide port on the mount While parallel ports are rarely found on modern computers the GPUSB device is a very popular way to connect a computer to a telescope mount The on- camera selection relies on the driver for the guide camera to provide a guide port interface After selecting the mount type click on the telescope icon to connect As with the camera you may have to make additional selections depending on the mount and interface The status bar at the bottom of the PHD window shows whether the camera and mount are connected PHD refers to the mount as scope It will show no cam no scope and ??no cal ? no calibration initially This status bar provides other useful information that is often overlooked so get familiar with it The menu also has some important features but we'll get to those later The other menus are not important unless you don't read this document in which case the menu will be essential Once the camera is selected you can click on the loop icon rd from left to start displaying images from the guide camera The ?rst thing you want to do is select the exposure time Cfrom the pop-up menu to the right of the stop icon To some degree the exposure may be de ?ned by the brightness of available stars and the sensitivity of the camera However