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2023
40 posts from 2023.
Mamiya Press 50mm f/6.3: Dented Rear Rim and Stuck Seikosha-S Shutter
This 50mm f/6.3 Mamiya Press Lens arrived in the shop with a couple of issues: the rear element group had a very severe ding on the edge. And the shutter…
RZ67 65mm L-A Lens: Checking the Floating Element Position
After any service on a Mamiya RZ67 65mm L-A lens, the floating lens position needs to be checked. While it is set at production, lens resolution may be…
RZ67 110mm Lens: Broken Diaphragm Pin and Shutter Replacement
This Mamiya RZ67 110mm lens came into the shop with a diaphragm that did not work. The issue was straightforward, the pin on the diaphragm control ring had…
RB67 Power Backs: Motorized Back Versions Explained
I get a regular stream of questions regarding the motorized backs for the RB67. So, here is the breakdown: Mamiya initially introduced the 120/220 power…
Mamiya 7: Sticky Dials from a Liquid Spill
This Mamiya 7 had a problem with the shutter speed dial, ASA dial, compensation dial, lock button and shutter release button all sticking or stuck in…
Mamiya 7 65mm Lens: Damaged Shutter Blades on a Loose Pivot
This Mamiya 7 65mm lens came into the shop with an erratic shutter. Sometimes it would not open or open partially. Looking at the second photo shows one of…
Mamiya 645 80mm f/1.9 Cine Lens: Loose Focus Ring Setscrews
This Mamiya 80mm f/1.9 cinema modified lens came into the shop with a loose focus ring. Not an uncommon issue with this lens as the focus ring is held to…
Mamiya 6: Cutting Replacement Viewfinder Glass
Servicing a Mamiya 6 with a broken viewfinder glass. While replacing broken viewfinder glass is a regular repair for me on the Mamiya 6/7 models, for some…
Mamiya 7 210mm Lens: Service and Lack of Rangefinder Coupling
Servicing a Mamiya 7 210mm lens. The 210mm lens is a bit of an oddball in that it does not rangefinder couple to the camera body. So, you have to estimate…
Mamiya 7 43mm Lens: Construction Differences and Special Tools
This Mamiya 7 43mm lens is having some service done to it and I thought I would point out some differences between it and the other Mamiya 7 lenses in…
Mamiya 7 80mm Lens: Haze Cleaning and an Out-of-Parallel Filter
This Mamiya 7 80mm lens came into the shop with the haze as shown in the first photo. My client told me that this suddenly appeared so I was hopeful that…
RB67 C Lens: Flash Sync Socket Replacement
The most common solution when an RB67 C lens will not fire the flash is a sync socket replacement. In this case, I replaced the socket, the socket holder…
Mamiya 645 110mm f/2.8: Removing Moly Paste from the Focus Helicoid
Servicing a Mamiya 110mm f/2.8 lens for 645. Lens came in with focus rough and erratic. On disassembly, the focus helix was found to be lubricated with a…
Mamiya 7 65mm Lens: Full Open Shutter Modification
Modifying a Mamiya 7 65mm lens for full open shutter operation. Since the Mamiya 6/7 lenses have shutters that stay closed normally, they can't be used…
Mamiya Universal: Hazy Finder Cleaning and Rangefinder Calibration
Servicing a Mamiya Universal and 250mm f/5 lens. This particular example from 1981 looks like new, appears to have had very little use (many of these…
Mamiya 7II: Replacing Cracked Viewfinder Glass
Replacing a broken viewfinder glass on Mamiya 7II. As seen in the second photo, there is a small crack in the viewfinder glass in the upper left corner…