correction optical system, attachment, waterproof lens port, waterproof camera case, the optical system, and, of correction optical system production method

摘要

When it is attached to the the objective lens, the correction optical system that is capable of correcting the aberration, attachment, waterproof lens port, waterproof camera case, the optical system, and to provide a manufacturing method of the correction optical system. correction optical system CL to be placed on the object side of the objective lens SL1 such imaging lens includes a first lens component L1 having a negative refractive power, a second lens component L2 having a positive refractive power, a It has the most object-side surface of the second lens component L2 has a convex shape toward the object side, and I satisfies the predetermined condition.