Barlow Lens 4x Powermate 2"

Al Nagler's 4-element concept, continues the tradition of full-field sharpness with optimum aberration control. Like long eye-relief? Retain the eye-relief of long focal length eyepieces, while at high power. Enjoy, for example, the sharpness and comfort of the 32mm Plössl at up to 5 times the power!

The Powermate consists of a negative doublet plus a positive "pupil-correcting" doublet. This 4-element system provides the magnifying function of a Barlow without its limitations by restoring the field rays back to their original direction, as if the Powermate were not there. The result is a pure magnification increase.

The advantages in a nutshell:

• PowerMate with a combination of four lenses
• no vignetting when observing
• extremely good image
• good edge definition in almost all optical systems
• optimal when used together with an H-alpha telescopes due to parallel optical path
• very robust housing with 2" barrel and 1.25" reducer with compression ring clamp
• 2" filter thread

• the 2" PowerMate can be separated and an (optional) T-ring can be attached for photography