GCM-14 Rotary Neutral-Density Filter Holders

The source places a GCC-3030 circular metal-film variable neutral-density filter heading over the listing, but its four selectable SKU images show different mechanical items: single-row and double-row six-position wheels, a five-filter holder and a base. Do not assume any configuration includes optical filters or that these components form a single kit. Use each model image to identify the wheel layout, nominal filter size, mounting interface and actual supply scope. The English art is a family selection aid.

Model-by-model components

GCM-1402M is a single-row six-position wheel labeled 25.4×6; GCM-1401M is a double-row six-position wheel labeled 25.4×12 and “with drag tool”; GCM-141101M is a single-row five-filter holder labeled Φ25.4; GCM-1411M is its base labeled M4.

Assembly and fit

The pictured wheels have multiple circular openings around a central hub for compatible round optics. The holder and base are separate purchase options; their exact mutual fit and any included parts require confirmation.

Optical specifications

The GCC-3030 heading describes a variable neutral-density filter type. The four model images establish mechanical configurations only; they do not supply OD curve, spectral range, transmission or an installed filter count.

Contents to confirm

Retaining rings, a drag tool and screws appear in model pictures. Ask for the exact model-level packing list, material, aperture tolerance and mounting-thread specification.

Selection checklist

Choose wheel, holder or base by exact model

Check 25.4 mm optic fit and slot geometry

Verify mounting interface and included hardware

For filters, separately confirm optical specifications and inclusion

To be confirmed

Whether optical filters ship with any SKU

OD, transmission and wavelength range

Aperture tolerance, material and full accessory list

Fit between wheel, holder and base