Combining the best parts of various Vixen Mounts. The StarGuy Alt Az Pro is a step up from the Porta II Mount. It features the well designed Porta II head atop the HAL130SXG heavy duty tripod for a rigid platform with great stability. The "World-Standard" dovetail attachment system on the StarGuy Alt Az was developed by Vixen. This allows the Alt Az Pro head to accept various dovetail mounted optical tubes and binoculars. The Alt Az Pro also includes a metal accessory tray and 2 long flex handles.