» Home » Service Manuals » Russian Cameras » Jupiter-3 Focal Length Adjustment

 

 

Jupiter-3 Focal Length Adjustment

 


Jupiter-3 Focal Length Adjustment

This tutorial shows how to adjust the focal length of a 50mm Jupiter-3 lens so that it will focus accurately at all distances on a Leica screwmount camera.

The Russian-made screwmount rangefinder cameras and lenses used the same lensmount as the Leica, but a different focus calibration. This means that the lenses will mount on a screwmount Leica, but will not focus correctly. Adjusting the focus shims will only make the lens accurate at one distance; the focal length of the lens must be changed to make accurate focus at all distances possible on a Leica.

This tutorial was created by Brian Sweeny, a respected authority on repairing and adjusting the Jupiter-3 and other Sonnar-type lenses. He has generously shared it with us, along with several other lens servicing tutorials that he has written.

 

 

 

Please Note: In order to keep the site online, we are now asking $3.23 for each file download, except for tutorials written by members of the Learn Camera Repair Facebook Group, which are $1.25. After you complete the checkout process, you can log in to your customer account to download all the manuals you have paid for.

 

Price: $1.25

 

For the first five years that we operated this site, we were able to offer all of these manuals as free downloads. The site has gotten so large and popular that we are exceeding the limits of bandwidth and storage imposed by our web host. Please don't share these files; if we do not bring in enough revenue to pay to keep the site online, we will be forced to shut the site down. We've set the price low eough that it won't burden those who want to learn to repair cameras, while hopefully bringing in enough each month to keep the site open. We are not trying to make a profit from this.