All posts
RB67 127mm Lens: Delayed Shutter Release From Dried Lubrication
Servicing a 127mm Mamiya RB67 lens. Symptom was that there is a delay in the shutter release after the mirror goes up in the body. This is always caused by…
RB67 90mm f/3.8 Lens: 791 vs 653 Shutter Differences
Servicing a Mamiya 90mm f/3.8 lens for RB67. Mamiya made three different generations of shutters for the RB lenses. The last two are the most common that I…
Mamiya 645AF 80mm AF Lens: Broken Aperture Ring Gear
Servicing a Mamiya 80mm AF lens for 645AF cameras. Had to replace a broken plastic aperture ring gear. The diaphragm in this lens is electrically…
Fuji GS645S Wide 60: Replacing a Worn Spool Pin Lock
Servicing a Fuji GS645S Wide 60 camera. Camera came into the shop with one of the spool pins unable to lock in place. The second photo shows the camera…
RZ67II: Rough Focus From a Broken Fine Focus Gear
Servicing a Mamiya RZ67II. This body came into the shop with rough focus. In the case of an RZ67II, this is almost always a broken fine focus gear. My…
Mamiya 6 75mm f/3.5 L Lens: Loose Focus Ring and Helix Guides
Servicing a Mamiya 75mm f/3.5 L lens for Mamiya 6. Focus ring was loose so the lens was no longer able to focus properly. After tightening the focus…
RB67 Pro SD 120 Film Back: Broken Wind Pawl Locking the Lever
Servicing a Mamiya RB67 Pro SD 120 film back. This back came into the shop locked up, the wind lever would not move. During disassembly, I found a broken…
Ilex 5 Shutter: Cleaning the Slow Speeds Escapement
Servicing an Ilex 5 shutter. These are about the largest leaf shutters that you normally will find on large format cameras. This one needed a typical…
Mamiya 645 80mm f/1.9 Lens: Why It Comes Apart in Two Pieces
Servicing a Mamiya 80mm f/1.9 lens for the 645. This is the third 80mm f/1.9 to come into the shop this month in two pieces. Here is why: the lens has a…
Mamiya 6 75mm Lens: Cleaning Residue from the Rear Elements
Servicing a Mamiya 6 75mm lens. As you can see in the second photo, this lens had quite a bit of residue in the rear element group. Fortunately, I was able…
Mamiya Super Omegon 90mm f/3.5 Lens: Oil on Shutter Blades
Super Omegon 90mm f/3.5 lens by Mamiya. Servicing this lens (fits the Rapid Omega 100/200) with oil on the shutter blades. If you look at the number three…
RZ67 6x6 120/220 Back: Light Leaks and Overlapping Frames
Servicing a Mamiya RZ67 6x6 120/220 back. Not too common of a back for the RZ67. Complaint here was of light leaks and overlapping frames. Removing the top…
Mamiya 7 80mm Lens: Cleaning Haze from the Elements
Servicing a Mamiya 7 80mm lens. This lens had so called "haze" which turned out to be cleanable. Sometimes, with fungus, the glass/coating is damaged and…
Konica AR 57mm f/1.2 Lens: Insect Remains Inside
Konica AR 57mm f/1.2 lens with bug inside. I acquired this lens from a friend and he described it as having a "giant bug inside". Sure enough, there were…
Mamiya Sekor 55mm f/1.4 M42 Lens: Damaged Filter Ring and Versions
Servicing a 55mm f/1.4 Mamiya Sekor M42 thread mount lens. As you can see in the first photo, the filter threads have been damaged beyond repair by what…
Mamiya 60mm f/2.8 Macro Lens: Repair and Versions
Mamiya 60mm f/2.8 Macro Lens. Another lens that arrived in two pieces. Seems to be a lot of that going around lately. This lens I find interesting, not too…
Mamiya 105mm C Lens for TLR: The Six Versions Explained
Servicing a Mamiya 105mm f/3.5 D Lens for TLR. The 105mm lens had the most variations of all the C lenses made for the TLR series with a total of six…
RZ67: Dead Electronic Release, Burned Diode and Moisture Damage
Repair on Mamiya RZ67. This RZ67 came into the shop with mechanical release working, but electronic release inoperative. After removing one of the side…
Nikkor-O 55mm f/1.2 Instrumentation Lens: Diaphragm Blade Repair
Servicing an unusual lens: Nikkor-O 55mm f/1.2 instrumentation lens. These lenses were designed for close focus work and have no focus helix. They were…
Mamiya 55mm SX f/1.4 Lens: Cleaning and Regreasing the Focus Helix
Repair on Mamiya 55mm SX f/1.4 lens. This particular lens, from around 1975, needed the focus helix disassembled, cleaned and re-lubricated. The focus ring…
Mamiya 80mm f/2.8 C Lens Variations
Mamiya 80mm f/2.8 C lens variations. I get many questions on the different styles of 80mm f/2.8 lenses that were made for the Mamiya TLR series. Here is…
Mamiya 645 55mm f/2.8 Lens: Oily Blades and Flange Distance
Repair on Mamiya 55mm f/2.8 lens for 645 plus some technical info. This lens came into the shop with the typical oily blades. After cleaning, the blades in…
RB67 90mm K/L Lens: Floating Elements and Spacing Adjustment
Mamiya RB67 90mm K/L lens repair and info. First, some information on these lenses regarding a question that I am frequently asked: All the Mamiya RB67…
Mamiya 6x7 120 Roll Back: Broken Wind Lever Bushing
Mamiya 120 6x7 Roll back repair. This back needed a replacement winding base plate due to a broken wind lever bushing. The number five photo shows the…