How to Fix a Stuck Aperture on a Minolta 58mm 1.4 Rokkor Lens

How to Fix a Stuck Aperture on a Minolta 58mm 1.4 Rokkor Lens

A stuck aperture on a Minolta 58mm 1.4 Rokkor lens is a common problem that can be frustrating to deal with. The aperture blades are responsible for controlling the amount of light that enters the lens, and when they get stuck, it can cause a number of problems, including blurry images, uneven exposure, and even damage to the lens. Fortunately, there are a few things you can do to try to fix a stuck aperture.

Identifying the Problem

The first step is to identify the problem. If the aperture blades are stuck open, the lens will always be at its widest aperture, even when you try to stop it down. This will result in blurry images, especially in bright light. If the aperture blades are stuck closed, the lens will not be able to open up, resulting in underexposed images.

Tools and Materials

Before you begin, you’ll need a few tools and materials:

  • A small screwdriver
  • A soft cloth
  • A can of compressed air
  • A cleaning solution for camera lenses


Once you have the necessary tools, you can begin to disassemble the lens. This process can be tricky, so it’s important to be careful and take your time. You can find detailed instructions on how to disassemble a Minolta 58mm Rokkor lens online or in a camera repair manual.

Once you have the lens disassembled, you can access the aperture blades. Carefully remove any debris or dirt that you find. You can use a soft cloth and a cleaning solution to clean the blades. If the blades are still stuck, you may need to use a small screwdriver to gently pry them apart.


Once the aperture blades are clean and free of debris, you can reassemble the lens. Make sure to follow the instructions in your camera repair manual carefully. Once the lens is reassembled, test it to make sure that the aperture blades are working properly.


To prevent a stuck aperture in the future, it’s important to keep your lens clean and free of debris. Avoid storing your lens in dusty or humid environments, and always use a lens cap when not in use.

Professional Help

If you are not comfortable disassembling your lens, or if you are unable to fix the problem yourself, you can take it to a professional camera repair shop. A professional can diagnose the problem and repair the lens properly.

Remember, a stuck aperture can be a serious problem, but it’s often a simple fix. With a little patience and care, you can get your Minolta 58mm 1.4 Rokkor lens back in working order.