In my modest opinion, the focal lenght of the lens is correct. I started so happy with a 210mm and afterwards I bought the 110mm.

The difference between the 210 and the 240 is like a 63mm and a 72mm in the 35mm format (larger side of the format). I like both focals. This difference isn't big, and now I would prefer the longest.

I can't tell about the quality of the lens/shutter, I never use them; but I think that an Apo-Ronar is a guarantee in closer shots... my favourites.

Good luck,