How is it fitted and used
Hi Rose, the Lens assembly is the lens unit which comes with the projectors. You need to insert the lens up into the lens collar (which is fixed to the projector head). The Lens collar has a slit ring which will open to accommodate the Lens tube and grip it in place once inserted. You will find it easier to insert the lens into the lens collar if you insert at a slight angle, to open up the split ring on the lens collar. DO NOT lower the lens assembly from inside the projector.
If you want to enlarge the original image, then you need to insert the lens GLASS end UP but if you want to reduce the original image, then insert the lens GLASS end DOWN
Once the lens is inserted into the projector you will slide this up and down to focus the image.
I hope this information helps, kind regards