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ITelescopeV3FocalLength Property

The telescope's focal length, meters

Namespace:  ASCOM.DeviceInterface
Assembly:  ASCOM.DeviceInterfaces (in ASCOM.DeviceInterfaces.dll) Version: 3351c4f3fa64146a7efd5b51ed4591e32a0a5484
double FocalLength { get; }

Property Value

Type: Double
PropertyNotImplementedExceptionIf the property is not implemented
NotConnectedExceptionIf the device is not connected
DriverExceptionAn error occurred that is not described by one of the more specific ASCOM exceptions. Include sufficient detail in the message text to enable the issue to be accurately diagnosed by someone other than yourself.
This property may be used by clients to calculate telescope field of view and plate scale when combined with detector pixel size and geometry.

This is only available for telescope InterfaceVersions 2 and later.

See Also