• Front - 52mm inner diameter
• Rear side - M52x0.75 male and M50x.75 female thread

This adapter allows using Kowa Prominar Anamorphic 16-H attachment in front of lenses with M52x0.75 filter thread.

The inner diameter of the adapter is 52mm, so it fits the attachment perfectly (we prefer perfect fit instead of 'universal' solutions with long screws).

There is also M50x0.75 female thread at the bottom of the adapter to catch the Kowa rear thread for safety.

The depth is 13mm.

Recommended installation procedure:

1. Mount the adapter into a lens filter thread until stop.
2. Insert the Kowa attachment accurately into the adapter, slide it un till stop, and screw in clockwise until stop.
3. Turn the attachment counter-clockwise until you achieve a squeezed image without skew.
4. Secure the Kowa with three screws of the adapter.

The sample setup shows how the whole assembly may look.