![I was cleaning my focusing screen on a Minolta X-300 and this fell off the front mounting plate. The manual referred to it as the aperture coupling ring, where does the spring I was cleaning my focusing screen on a Minolta X-300 and this fell off the front mounting plate. The manual referred to it as the aperture coupling ring, where does the spring](https://preview.redd.it/i-was-cleaning-my-focusing-screen-on-a-minolta-x-300-and-v0-31hanryb956a1.jpg?auto=webp&s=0d0616f6e0840bdd01e12efc293d44146de1dda2)
I was cleaning my focusing screen on a Minolta X-300 and this fell off the front mounting plate. The manual referred to it as the aperture coupling ring, where does the spring
![Fotodiox C645-PK-Pro Pro Lens Mount Adapter - Contax 645 Mount Lenses To Pentax K Mount SLR Camera Body with Built in Aperture Iris - Walmart.com Fotodiox C645-PK-Pro Pro Lens Mount Adapter - Contax 645 Mount Lenses To Pentax K Mount SLR Camera Body with Built in Aperture Iris - Walmart.com](https://i5.walmartimages.com/asr/5846a9a8-9a25-4724-9ee5-7794422e293b_1.afecf9bc2a5c240b0c18a8a7080f3c12.jpeg?odnHeight=612&odnWidth=612&odnBg=FFFFFF)
Fotodiox C645-PK-Pro Pro Lens Mount Adapter - Contax 645 Mount Lenses To Pentax K Mount SLR Camera Body with Built in Aperture Iris - Walmart.com
![Need help identifying this thin plastic piece inside Minolta X-300's lens mount to replace : r/AnalogCommunity Need help identifying this thin plastic piece inside Minolta X-300's lens mount to replace : r/AnalogCommunity](https://preview.redd.it/0delm53gfrj21.jpg?auto=webp&s=54051867f6a1fb76bffaea24e801455f340d9c15)