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03 SECONDARY L1SPLACEMENT 03 W I TH 03 WITH FOCUS 150-INCH STELLAR TELESCOPE 22 PARAXIAL AME 1 Ek APPROX arc seconds AURA Eng converted to arc coordinate critical length design positions Disp E. T. Pearson f-no f-number f/30 system FOCAL CHANGE BASED FOCAL DISPLACEMENT focal surface FOCUS AND SECONDARY FOCUS AT 18 HUM snooj IA hyperboloid I M Hi I M IA IA IA IA SHOO IMAGb image diameter change image surface inch focus range IVIXVHAd MAGE DIAME1Ek maximum radius minimum image diameter mirror back surface optical elements PARAXIAL FCCUS CHANGE PARAXIAL FOCUS Primary mirror back prime focus position qnvw RADIUS OF CURVATURE refocusing relative displacement rs(max SAMPLE RAYS FOCUS SECONDARY DISPLACEMENT secondary focal position secondary focii secondary mirror displacement secondary mirror surface secondary systems SnOOd snooj IA 9 Snooj snnoj surface at rs,zs sYvh Tech Temp temperature change value of F W I TH FOCUS