Most questions can be answered here: Cine-Mod FAQ

The Cine-Mod is a modification process developed by Duclos Lenses that improves still photo lenses in several ways, making them more useable for motion picture applications. The Cine-Mod consist of three primary parts: A seamless focus gear, an 80mm front ring with 77mm filter threads, and de-clicked, damped aperture movement. Pricing can vary depending on size and complexity of some lenses. In general the prices are as follows.

 

Full Cine-Mod - $250/lens
 
or build your own Cine-Mod
1.   80mm cap     -   $20
2.   80mm front    -   $75
3.   de-clicking     -   $60
4.   focus gear     -   $105

We also offer a semi-permanent mount conversion for specific lenses using genuine Leitax replacement mounts.
Mount replacements include installation and calibration for $159 per lens, including:
Leica R to Canon Eos
Leica R to Nikon F
Nikon F to Canon Eos
 

If you would like to send your lenses in for the Duclos Lenses Cine-Mod, please download, complete, and include our Equipment Shipper in your package. All of these prices can change depending on a lot of variables but this is fairly common for most Nikon, Canon, Zeiss, and Leica lenses. If you have more questions, please read through the Cine-Mod FAQ and if you still have questions feel free to contact a Duclos Lenses rep.