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A tremolo is a rapid alternation between two notes (or sets of notes, you can have polyphonic tremolos) which can be any arbitrary distance apart — including zero. A trill is a subset of tremolo, where the distance between any two notes being alternated is a second, either major or minor.
Tilt-shift lenses provide the ability to adjust the composition framing and field of view without selecting the camera up or down.
<u>Explanation</u>:
- A tilt-shift lens allows us to change the position of the imaging circle without selecting the camera up or down.
- In the tilt-shift lens, we can tilt the lens.
- Also, we can change the center of the imaging circle.
- After changing the center of the imaging circle, we can straighten the lines that appear to converge in the distance.
- So the tilt-shift lens is better compared to other lenses.