Threaded rings for lens shutters

For large-format cameras

Threaded retaining rings to mount Copal, Compur and Prontor lens shutters on large-format camera lensboards.
For thread sizes up to 66mm, the rings are made in brass. For larger sizes the ring may be made in aluminium. The rings are partially painted matte black on rear.
Available for lens shutter sizes #00, #0, #1, #3 and #3S. Also available for Compur 2, Compound 3, Compound 4, Seiko 1 and Ilex 5 lens shutters.

For vintage Compur 2 and Compound 3 shutters, lensboard adapters to fit Copal 3 lensboards are available on “Lensboard shutter adapters”.

For Copal lens shutter sizes

Threaded retaining ring for large-format #00 lens shutters with 25mm x 0.5 thread
for Compur 00 lens shutters
made to fit #00 drilled lensboards with 26.3mm diameter hole
EUR 10.00
plus VAT within Europe
Threaded retaining ring for large-format #0 lens shutters with 32.5mm x 0.5 thread
for Compur 0, Copal 0 and Prontor 0 lens shutters
made to fit #0 drilled lensboards with 34.6mm diameter hole
EUR 10.00
plus VAT within Europe
Threaded retaining ring for large-format #1 lens shutters with 39mm x 0.75 thread
for Compur 1, Copal 1 and Prontor 1 lens shutters
made to fit #1 drilled lensboards with 41.6mm diameter hole
EUR 12.50
plus VAT within Europe
Threaded retaining ring for large-format #3 lens shutters with 62mm x 0.75 thread
for Compur 3, Copal 3 and Prontor 3 lens shutters
made to fit #3 drilled lensboards with 65mm diameter hole
EUR 20.00
plus VAT within Europe
Threaded retaining ring for large-format #3S lens shutters with 61mm x 0.75 thread
for Copal 3S lens shutters
made to fit #3 drilled lensboards with 65mm diameter hole
EUR 20.00
plus VAT within Europe

For Compur and Compound lens shutters

Threaded retaining ring for Compur shutters with 44mm x 0.9 thread
made to fit lensboards with 46.5mm diameter hole
EUR 18.00
plus VAT within Europe
Threaded retaining ring for Compur 2-X Tube 5 shutters with 50mm x 29-1/13tpi thread
for Compur 2 lens shutters with 50mm diameter thread
made to fit lensboards with 52.5mm diameter hole
EUR 20.00
plus VAT within Europe
Threaded retaining ring for Compur 2-X Tube 6 shutters with 55.8mm x 29-1/13tpi thread
for Compur 2 lens shutters with 55.8mm diameter thread
made to fit lensboards with 58.3mm diameter hole
EUR 20.00
plus VAT within Europe
Threaded retaining ring for Compound 3-X Tube 7 shutters with 60mm x 29-1/13tpi thread
for Compound 3 lens shutters with 60mm diameter thread
made to fit lensboards with 62.5mm diameter hole
EUR 20.00
plus VAT within Europe
Threaded retaining ring for Compound 4-X Tube 9 shutters with 65.9mm x 29-1/13tpi thread
for Compound 4 lens shutters with 65.9mm diameter thread
made to fit lensboards with 68.4mm diameter hole
EUR 20.00
plus VAT within Europe
Threaded retaining ring for Compound 4-X Tube 10 shutters with 76.7mm x 29-1/13tpi thread
for Compound 4 lens shutters with 76.7mm diameter thread
made to fit lensboards with 79.2mm diameter hole
EUR 25.00
plus VAT within Europe

For Seiko lens shutter sizes

Threaded retaining ring for Seiko 1 shutters with 46mm x 0.75 thread
for Seiko 1 lens shutters with 46mm diameter thread
made to fit lensboards with 50mm diameter hole
EUR 18.00
plus VAT within Europe

For Ilex lens shutter sizes

Threaded retaining ring for Ilex 5 shutters with 3.225″ x 30 thread
for Ilex 5 lens shutters with 81.9mm diameter thread
made to fit lensboards with 84.5mm diameter hole
EUR 25.00
plus VAT within Europe


Contact for a custom made adapter for lens shutters