Physics · Optical Instruments

Which of the following is NOT an advantage of an internal focusing telescope?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1The line of collimation is less likely to be affected by focusing
2Wear on the rack and pinion is less due to lesser movement of the negative lens
3The interior of the telescope is easily accessible for field cleaning and repairs✓
4In making measurement by the stadia method, an instrument constant is almost eliminated and computations are thus simplified

Correct answer

The interior of the telescope is easily accessible for field cleaning and repairs

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