Jam Lock ring for enlarging lens (SOLD INDIVIDUALLY)

The Jam Lock Ring for an enlarging lens is a mechanism used to secure the lens onto the lensboard of an enlarger. Here's what you need to know about it:

1. Purpose: The Jam Lock Ring serves as a mounting mechanism to attach an enlarging lens securely onto the lensboard of an enlarger. It ensures that the lens remains stable and properly aligned during the printing process.

2. Function: The Jam Lock Ring typically consists of a ring with threads on its inner surface and a locking mechanism, such as set screws or thumb screws, on its outer surface. The ring is threaded onto the lensboard, and the enlarging lens is inserted into the center hole of the ring. The locking mechanism is then tightened to secure the lens in place.

3. Compatibility: The Jam Lock Ring is designed to be compatible with the specific lensboard and enlarging lens being used. It should have the appropriate thread size and dimensions to fit both the lensboard and the lens securely.

4. Adjustability: Some Jam Lock Rings may feature adjustable set screws or thumb screws that allow for fine-tuning the position and alignment of the lens once it's mounted on the enlarger. This adjustability is useful for achieving precise focus and alignment during the printing process.

5. Usage: When mounting an enlarging lens using a Jam Lock Ring, it's important to ensure that the lens is properly centered and aligned on the lensboard to avoid vignetting or image distortion. The locking mechanism should be tightened securely but not excessively to avoid damaging the lens or lensboard.