Autoguider Adapter Lens
The F50W3 above may be used with the small Orion or Meade type auto-guiders. In order to reach focus with many of these auto-guiders this lens may be required. Merely screw this lens into the filter thread in front of the auto-guider and then insert the guider in the finderscope instead of the eyepiece.
The LAA is being replaced with the F50GSA adapter