TeleVue Powermate (PMT-2513)
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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 Powermatewere not there. The result is a pure magnification increase.
The advantages in a nutshell:
|Connection (to the telescope)||1,25"|
|Coating of optical system||multiple|
|Number of lenses||4|