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Is this camera lens convex, or concave? Virtual, or real image?

A camera is filtered with a lens having a 200 mm focal length.
Is the lens convex or concave?
Is the image real or virtual?
If your object is 1 m away from the lens, how far must the lens be from the film so a well focused image falls on the film?
Explain your work. Thank you!

The image is real, being projected to the film.
Real image = convex lens.
Use thin-lens equation (not exactly applicable to a long lens, but that's all you can do with the info given):
1/f = 1/do + 1/di, do=object distance, di=image distance.
di = 1/(1/f-1/do) = 1/(5-1) = 1/4 m

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