I presume that you have read my previous post on preparing the tool needed for repair for minolta 50 mm oily aperture, as you will start to use the tool here in below steps to remove the front element.
In order to repair the oily aperture of Minolta 50mm F1.7, you will need to remove the front element of the prime Lens. Here is the step by step guide to remove it.
Please move your mouse pointer to the image and off the image to see the before and after effect.
First , find the suitable the suitable rubber ring tool to use to remove the front lens ring. How to remove the front ring? Attach a suitable size ring tool to the front ring and turn anti-clock wire until the front ring is loosen. Continue turn and the front ring can be removed.
After removing the plastic front ring, you need to remove len’s hood. Unscrew the 3 screw circled in red.Removed the hood element.
Removing the 3 screw highlighted in red circle, then remove the front element.
After removing the lens element , you should able to reach the aperture blade as shown below.
Do you able to reach here? Drop me a comment if you fail to reach here. i will see what i can help.
Any precautions needed?
This is more toward the mechanical part, no issue will exist if the orientation of the part is not aligned.
Do not touch the front element with your finger as this will leave a oil stain (finger print mark) on the lens element. if you don’t clean it, you will have problem later as this will affect the final output photo as the oil mark will block the light path to the camera sensor / CCD.
My personal experience in removing rubber ring, hood and front lens element
To remove or to reassemble the front element, hood and ring will not face any major issue. Only a minor issue where the front rubber ring is hard to open as the lens was 25+ years old. By using additional force and appropriate Lens ring tools, the front rubber ring should able to unscrew easily.
Above step should take < 5 minutess to remove or to re-assemble.
Since you have already removed the front lens element, you can take this opportunity to clean the front element by using a blower or clean the glass using IPA.
The next topic will be removing the rear socket.. stay tune !
I’ve found the Minolta 28mm f/2.8 disassembly to be very similar, almost identical to how you describe. So anyone looking to repair a 28 f/2.8 can follow these same guidelines.
Hi Joe,
yes, Minolta 28mm , 50mm prime share the similar technique to disassemble it. The only problem is to re-assemble it and re-gaining the infinity focus where most people fail. The same trick in 50mm should work in able to use in 28mm.