Composer Pro II + Edge 35: Swap Issue Fixes
By Lensbaby | Published: 2026-10-20
Category: How-to Guides
Step-by-step solutions for common optic swap problems with the Composer Pro II and Edge 35 lens, including alignment, stuck blades, and focus issues.
Quick Answer
Fix most Composer Pro II + Edge 35 swap issues by checking alignment marks, cleaning the aperture mechanism, and resetting the focus lock before each use.
Why Swaps Sometimes Jam
The Edge 35 optic uses a precise bayonet mount inside the Composer Pro II. If the lens body or the optic has dust, oil, or minor burrs from normal wear, the release lever may not engage fully. This usually causes the aperture blades to stay closed or the focus ring to feel stiff.
Another common cause is accidental rotation of the aperture ring while pressing the release button. The Edge 35 has a delicate blade assembly; twisting under pressure can misalign the blades temporarily.
When to Stop and Choose Another Option
If the optic still does not lock after three gentle attempts, do not force it. Forcing can bend the mount tabs or chip the aperture blades. Contact Lensbaby support for a replacement or try swapping the Edge 35 onto a different body to isolate the issue.
Troubleshooting Diagnosis Steps
- Symptom: Lens won't attach or release: Align the red dot on the Edge 35 optic with the dot on the Composer Pro II body. Press the release button fully, then rotate the optic clockwise until you hear a click. If the click does not happen, remove the optic, inspect both surfaces for debris, and retry. If debris is visible, clean both mounts with a dry lint-free cloth before reattempting.
- Symptom: Aperture blades stay closed: The Edge 35's aperture ring must be set to the wide-open position (f/3.5) before attaching. When swapping optics, the ring can shift. Set the ring to the smallest aperture (f/22), then back to f/3.5. If blades still do not open, tap the optic gently with your palm; static friction after shipping can hold blades closed.
- Symptom: Focus ring or tilt mechanism feels stuck: Check that the tilt lock ring on the Composer Pro II is fully loosened. The Edge 35 has a shorter focus travel; forcing a tilted lock can jam the mechanism. Loosen the lock ring completely, center the lens, then tighten just enough to hold position. If stiffness continues, remove the optic and test the Composer Pro II body alone. A smooth body indicates the Edge 35 needs a service check.
Related Product
- Composer Pro II + Edge 35: The Lensbaby Edge 35 Optic is a 35mm f/3.5 optic that delivers a slice of focus bordered by smooth blur, compatible with the Composer Pro II system. Knowing your optic's mount compatibility helps avoid swap errors and ensures precise tilt control.
Composer Pro II + Edge 35
