| 21. | The distortion includes chromatic and spherical aberration and diffraction, as well as structural flaws in the outer lens.
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| 22. | These tests correctly reported spherical aberration, but were dismissed since the reflective null corrector was considered more accurate.
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| 23. | If the mirror is made parabolic, to correct the spherical aberration, then it must necessarily suffer from astigmatism.
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| 24. | It had almost no flaws, except for a bit of oblique spherical aberration, which could lower peripheral contrast.
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| 25. | The asphere's more complex surface profile can reduce or eliminate spherical aberration and also reduce other collimating diode lasers.
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| 26. | The spherical aberration of the cornea is usually positive whereas the young crystalline lens exhibits a negative spherical aberration.
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| 27. | The spherical aberration of the cornea is usually positive whereas the young crystalline lens exhibits a negative spherical aberration.
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| 28. | The geometric collecting area of each telescope is about 25 cm2, with spherical aberration limiting resolution to about 0.25�s.
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| 29. | Of thin positive lenses with n = 1.5, four are necessary to correct spherical aberration of the third order.
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| 30. | The caustic formed by spherical aberration in this case may therefore be described as the evolute of a Cartesian oval.
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