In order to take advantage of our wider selection of 1.5 and 2 Inch Series accessories, use one of these adapters to step down from a 2 or 3 Inch Series condenser to a smaller size of series. Keep in mind that there will be power loss from a collimated beam due to the reduction in clear aperture. If the beam is focused, the step down can be made without power loss. You can then re-collimate the beam with a 1.5 Inch Series Secondary Focusing Lens Assemblies for Light Sources.
