Fixed-focus telescope objective Type A

Diopter telescopes are adjustable focus telescopes that serve the measurement of optical power of lenses in diopter. The measuring result can be directly read from the diopter graduation. APPLICATION EXAMPLES • Fast testing of optical power • Testing the diopter graduation and infinity adjustment of eyepieces • For additional enlargement on telescopes, o.g. when adjusting reticles • As reading telescopes in the negative distance range