What size lens cap will fit a Quantaray Tech-10 Lens?

Question

I lost the lens cap to my Quantaray Tech-10 Lens. It is 70-300mm focus. I can't seem to figure out what size replacement lens cap I need.

Answer 1

Look around the end of the lens barrel - where it has the 70-300mm markings. It should have a symbol like a slightly flattened 'o' with a line through and '= xxx mm' The number represented by my xxx will be the size of the lens cap you need (It's the same as the filter size)