Mamiya 180 f4.5 RB67 lens help

MichaelMcC · Oct 7, 2023

Hi all,

First post here!
I just picked up a rb67 with a 180 f4.5 on the cheap and noticed this little loose ring beside the rear element. Any advice on what it is and why it might be loose?

Thanks in advance and looking forward to chatting with you all in future!

MattKing · Oct 7, 2023

Welcome to Photrio.
I tweaked your thread title slightly, because there are a lot of different Mamiya 180 mm lenses out there.
Someone like @Mamiya_Repair may be able to help you with your question.

MichaelMcC · Oct 7, 2023

MattKing said:
Welcome to Photrio.
I tweaked your thread title slightly, because there are a lot of different Mamiya 180 mm lenses out there.
Someone like @Mamiya_Repair may be able to help you with your question.

Thanks Matt!

Really appreciate it!

Mamiya_Repair · Oct 7, 2023

That part is one of three light baffles on the rear of the lens. Two of them are glued in place and can come loose. The large baffle has notches for a spanner wrench, it gets removed and then you can re-glue your loose baffle to it...

MichaelMcC · Oct 7, 2023

Mamiya_Repair said:
That part is one of three light baffles on the rear of the lens. Two of them are glued in place and can come loose. The large baffle has notches for a spanner wrench, it gets removed and then you can re-glue your loose baffle to it...

Thank you so much for the reply! Really appreciate it! Sounds beyond me so I'll fire it off for repair but at least I know the issue now. What a lovely forum. So glad I joined!

Neil Grant · Oct 8, 2023

..when it's been repaired can you post the relevant details? It's useful for other members to know which people are still servicing these cameras. THanks

MichaelMcC · Oct 8, 2023

Neil Grant said:
..when it's been repaired can you post the relevant details? It's useful for other members to know which people are still servicing these cameras. THanks

Absolutely Neil! Will do.

Donald Qualls · Oct 9, 2023

Well, as one might guess from his handle, Mamiya-Repair is in fact a Mamiya repairer. I sent him an RB67 lens that had a slow shutter a few months ago (sadly, it wasn't economically repairable, but he let me know that promptly and charged only return shipping to get the lens back).

MichaelMcC · Oct 27, 2023

Hi all, thanks so much for your interest and advice. I received my RB67 and 180 4.5 C back from a wonderful repair technician here in Dublin called Clive McDonnell. He repaired the light baffle pictured above and serviced the camera including back. All light seals replaced (including mirror box), replacement of one side panel and front name panel attached to bellows front as well as worn mirror cocking lever. Also a repair on a frame counter issue on pro s back.
All working beautifully and what a pleasure to use! Highly recommend Clive. Fastidious, skillful and reasonable. I'm delighted.

harlequin · Oct 28, 2023

I thought for the Rb67

180 non c
180 c

virtually the same except coating

KL lenses Pretty Rare 180 and looks different from back of shutter
cocking mechanism used mostly on SD version.

Neil Grant · Oct 29, 2023

..thanks for the repair tech.
180 C or non C. The answer is C is better. Better contrast, better against-the-light. With the light coming from behind the camera (a low flare situation) the non C lens is passable and the difference between C and non C is minimised. Other situations, non C fails to hold contrast.

Mamiya 180 f4.5 RB67 lens help

MichaelMcC

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