Thx a lot, but afterall, how are the F, 2F defined in different lenses
@MarcYam Жыл бұрын
F is defined as the point to which rays parallel to the principal axis are converged. 2F is defined as the point which has two focal length from the lens.
@carsonkwan1738 Жыл бұрын
@MarcYam get it now! Thx tho my f3 exam already ended🤣 You absolutely helped the most in physic. Explaining everything that took our teacher 1 year to teach to few videos. Genius