Lenses
96 posts tagged Lenses. Search within these →
Mamiya 7 65mm Lens: Measuring Front and Rear Group Spacing
Inspecting a Mamiya 7 65mm lens for potential focus issues. All lenses that I service get certain parameters evaluated and on the Mamiya 7 65mm and 43mm…
Mamiya SF 150mm RB Lens: Drilled Name Ring and Parts Donor
This Mamiya SF 150mm RB lens came to me with a name ring pre-drilled and a filter ring with some subtle dents. These are not too important flaws in this…
Mamiya 7 80mm Lens: Drying Out Moisture Inside the Lens
This Mamiya 7 80mm lens was subjected to moisture. Fortunately, no damage to the shutter. After removing the lens group and some disassembly and cleaning…
RB67 250mm Lens: Impact, Separation and Fungus
This Mamiya RB67 250mm lens wins the weekly trifecta for issues: 1.) impact damage 2.) separation in the element group 3.) lots of fungus. Looks like this…
Nikon 50mm f/1.8 Series E: Insect Shells Inside the Lens
Servicing a Nikon 50mm f/1.8 Series E lens. This lens was in exceptional condition except for one issue: there was a small family of three insects living…
Mamiya 7 80mm Lenses: Separation and Fungus in the Rear Group
I have had two Mamiya 7 80mm lenses in for service this week and was unable to fully resolve the issues with them. Reason: separation and fungus on the…
Mamiya C220 After a Fall: Finder Glass and Filter Ring Repair
This Mamiya C220 had a rough time recently . It was sent to me by @sirjakethomas and he told me that during his recent London trip, it had a bit of a fall…
Mamiya 7 Lenses: Evaluation Process and Testing Steps
These Mamiya 7 lenses were sent in for evaluation and here is the process that I do with these lenses: 1.) external observation for impact damage or other…
Mamiya 55mm f/4.5 TLR Lens: Removing Filter Thread Dents
Removing dents from the taking and viewing lenses on a Mamiya 55mm f/4.5 lens for TLR. Fortunately, the owner of this lens was wise and did not take a…
Mamiya 645 80mm f/2.8 N: Loose Focus Ring and Slow Diaphragm
Servicing an 80mm f/2.8 N Mamiya 645 lens. This lens came into the shop with the complaint of a loose focus ring. A straightforward repair where some…
Mamiya 6 Lens: Inspecting a Botched DIY Disassembly
I bought this Mamiya 6 lens recently knowing that it did not work so might be fixable or usable for parts. My end of the week project was to inspect the…
RB67 37mm Fisheye: Mounting Problem and Delayed Shutter Release
Servicing a not too common lens for the Mamiya RB67 - the 37mm Fisheye, the widest lens made for that system. This example would be one of the earlier…
Mamiya 7 80mm Lens: Dented Filter Ring, Focus and Rangefinder
As you can see from the first photo, this Mamiya 7 80mm lens had a bit of an impact to the front filter ring. In the second photo, I show the result of…
Mamiya 645 55mm f/2.8 Lens: Oily Diaphragm Blade Cleaning
Performing a typical diaphragm cleaning service on a Mamiya 55mm f/2.8 lens for 645. Not only do the blades need to be removed for cleaning, but the…
Mamiya 120mm f/4 Macro Lens for 645AF: Manual Focus Dual Helicals
Servicing a Mamiya 120mm f/4 Macro Lens for 645AF. Although this lens is made for the Mamiya 645AF, it is a manual focus lens. This is due to the very long…
RB67 140mm f/4.5 Macro: Locating Pin Replacement and Fungus
Servicing a Mamiya 140mm f/4.5 Macro lens for RB67. Replacing a damaged lens locating pin, removing and cleaning lens lock ring and cleaning fungus from…
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…
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…
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 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…