6-bit Coding Lenses for Leica Cameras

Link to Leica 6-bit codes: https://lavidaleica.com/content/leica-lens-codes I have seen a few different methods to apply 6-bit codes to non-coded lenses. The main method is to use a template, but in my experience it’s more time consuming to build your template and there’s also too much tolerance between a paper template and the lens mount that you are never quite sure if you are applying your markings in the right place. My method relies on simple household items and a bit of eyeballing to apply the markings in the right place. Tools required: - Masking Tape - X-Acto knife or scissors - Sharpie or other marker - Black paint (I used a matte automotive spray paint) - Thin paint brush - Optional: needle, Q-Tip and rubbing alcohol Method: - Cut 2 small strips of tape. - Place the first strip on the edge of the body where the 6-bit sensor is located. - Place the second strip on the lens at the same spot. - With good light, you can see the individual sensors on the body. Mark your tape with the border of each sensor. - Remove the lens and transfer the markings to the groove in the bayonet. - Spray a little bit of paint in a container to make it liquid. Don’t do this close to the lens! - Use the code to mark the lens with paint, note the orientation of the code and the lens. The pattern should be read clockwise with the markings at the 12 o’clock position. - Allow some time to dry. - Clean up your markings or any excess paint with the X-Acto (or needle). Be careful not to get any debris into the lens. - Mount the lens on your camera set to Automatic lens detection. If the lens shows incorrectly, try to add/remove paint. Worse case, you can use a Q-Tip and rubbing alcohol to remove the paint and start over. Other notes: - Your black paint should ideally be matte. Some research shows the M8 could get away with a shiny surface, but other Leica’s are more sensitive. - Leica lenses come with white markings, these are not necessary as the camera registers blank areas as white. - There are 2 main reasons to code your lenses: remove/diminish vignette and add EXIF data to your images to show focal length. - I recommend you try your desired code manually before painting your lens. This way you can see the impact it has on your images. - The best code for your non-Leica lens might not match the focal length. Flat Field Correction in Lightroom can mitigate these issues. - Free from Adobe: https://www.reidreviews.com/examples/flatfieldnew.html - Recommended reading: https://www.reidreviews.com/examples/flatfieldnew.html

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