How to Mount an OM Lens to M39 Screw Mount
Photography enthusiasts often find themselves in a world where compatibility is key. One such scenario is when you have a beautiful OM lens and want to mount it on a camera with an M39 screw mount. This guide will walk you through the process step by step, ensuring a seamless integration.
Understanding the OM Mount
The OM mount, developed by Olympus, was introduced in the 1960s. It was known for its compact size and high-quality optics. The OM lenses are renowned for their sharpness and build quality, making them a favorite among vintage camera enthusiasts.
Understanding the M39 Mount
The M39 mount, also known as the Contax mount, was used by various camera manufacturers, including Zeiss Ikon, Contax, and Yashica. It is a popular choice for medium format photography due to its compatibility with a wide range of lenses.
Compatibility Issues
Before attempting to mount an OM lens to an M39 screw mount camera, it is essential to understand the compatibility issues. The OM mount has a flange focal distance of 40.5mm, while the M39 mount has a flange focal distance of 40mm. This small difference can cause issues with infinity focus and vignetting.
Tools and Materials Needed
Here’s a list of tools and materials you will need for the process:
| Item | Description |
|---|---|
| Adapter | An adapter specifically designed to mount OM lenses on M39 screw mount cameras. |
| Camera with M39 mount | The camera you will be using with the OM lens. |
| OM lens | The lens you want to mount on the camera. |
| Microfiber cloth | For cleaning the lens and camera mount. |
| Grease | Optional, for lubricating the adapter and ensuring smooth operation. |
Step-by-Step Guide
Follow these steps to mount your OM lens on an M39 screw mount camera:
- Remove the lens from the OM mount camera.
- Attach the adapter to the OM lens. Ensure that it is securely fastened.
- Attach the adapter to the M39 screw mount camera. Most adapters will have a screw thread that matches the M39 mount.
- Adjust the lens focus. Due to the slight difference in flange focal distance, you may need to adjust the lens focus to achieve infinity focus.
- Clean the lens and camera mount with a microfiber cloth.
- Test the lens on the camera. Take a few test shots to ensure that the lens is functioning correctly and that there are no issues with vignetting or focus.
Common Issues and Solutions
Here are some common issues you may encounter when mounting an OM lens to an M39 screw mount camera, along with their solutions:
- Vignetting: If you notice dark corners in your images, try adjusting the lens focus or using a lens hood.
- Focus issues: If the lens does not focus properly, try adjusting the lens focus or using a different adapter.
- Compatibility issues: If the adapter is not compatible with your camera, try a different adapter or consult with a professional.
Conclusion
Mounting an OM lens to an M39 screw mount camera can be a rewarding experience. With the right adapter and a bit of patience, you can enjoy the sharpness and build quality of an OM lens on your M39 camera. Just remember to take your time and test the lens thoroughly to ensure that it is functioning correctly.
