50mm f4.5

  • Angle of View: 82 deg
  • Construction: 11 elements/8 groups
  • Filter Size: 77mm
  • Minimum Focus: ?
  • Weight: 920g
  • Minimum aperture: 32


5 responses to “50mm f4.5”

  1. Robert Avatar

    Anyone have any vignetting issues with the 50mm non-C? I taking a step back in time by getting rid of the digital SLR and getting an RB67. Just had my first trip with it to Iceland and had a few frames with some vignetting or light fallow on the edges. Not sure if it was my filter or something else? Thanks

    1. jodys Avatar

      That is a bit perplexing–I have a 50mm C and haven’t noticed any vignetting. Please, keep us posted if you discover it was the lens.

  2. Panoramic PEI Avatar
    Panoramic PEI

    Probably should have posted here instead…..apologize for the repeat.
    I recently purchased some Mamiya RB SD gear separately from all over the place.
    I just received the 50mm RB Sekor C Lens, although I haven’t received the Mamiya RB SD Body as yet.
    There is a noticeable clunking sound as some slight glass movement, just wondering if this is normal as it might something to do with the floating element or is it a defect? All appears normal visually.
    Also this lens has a silver collar on the rear of the lens, would it signify I will absolutely need the Mamiya Spacer Adapter for use with the Mamiya RB SD? Your replies are greatly appreciated.

  3. DP Avatar

    Hello! I’m having a technical issue that I was hoping someone could help me resolve. I own an RB67 Pro S and just recently purchased the Sekor C 50mm f4.5 lens. The issue is, I just can’t get the lens to seat on the camera body. Is this lens even compatible with the camera? Is there an adapter I need? Your help is greatly appreciated!

    1. jodys Avatar

      I hope you figured this out, but my thinking would be if somehow the ProSD adapter ring was put on somehow? I believe you’d need to remove the sleeve to make it fit the ProS body.

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