plural of narrow-angle lens

(photography) A telephoto lens

plural of obtuse-angled triangle

plural of wide-angle converter

A lens screwed onto the front of an existing camera lens to give a wider field of view.

(nautical) Synonym of limit of positive stability

plural of first angle projection

(uncountable) A method of technical drawing where the front view of the object is placed in the third quadrant, the side view is to the right, and the top view is above it. (More common in North America.)

plural of third angle projection

(uncountable) A method of technical drawing where the front view of the object is placed in the first quadrant, the side view is to the left, and the top view is below it. (More common in Europe and Asia.)