645
63 posts tagged 645. Search within these →
645 PRO: Fixing a Botched Mirror Stop Replacement
While I don't like to critique other technicians work, I am going to say something about a recent repair that came in for work on a 645 PRO. My client had…
Mamiya 645E: Counter Repair and Model History
A Mamiya 645E on the bench for repair to the counter system. The 645E is a bit of an oddball: introduced in May 2000 and made concurrently with the 645 PRO…
Mamiya 645 45mm C Lens: Oily Diaphragm Blades and Reassembly
Servicing a Mamiya 45mm C lens for the 645 system. Very common issue, oil on the blades causing the diaphragm to stay open wide. The 45mm lens (and the…
Mamiya 645 80mm f/2.8: Diaphragm Stuck Wide Open From Oil
This Mamiya 80mm f/2.8 lens for the 645 wins the contest this week for most oil on a set of diaphragm blades. The symptom that this produces is a diaphragm…
Mamiya 645 80mm f/1.9 N: Wrong Lubricant on Focus Helicoid
This Mamiya 645 lens, 80mm f/1.9 N, came into the shop with a focus that was very tight and grinding. Seemed to have no lubrication on the focus helical…
Mamiya 645 Super/Pro/ProTL: Damage From a Broken Mirror Stop
I have done a few posts about the Mamiya 645 Super/Pro/ProTL mirror stop replacement but feel the need to post again as I have been seeing many of these…
Mamiya 645 Pro: Checking Bayonet Flatness After Impact
This Mamiya 645 Pro came into the shop with what I suspect might have been some impact damage. In cases like this, I carefully inspect the camera for…
Mamiya 645 80mm f/2.8: Oily Diaphragm and Loose Focus
This 80mm f/2.8 lens for the Mamiya 645 wins the prize for most oil on lens diaphragms this week. Also, the focus was very loose and uneven. For the lens…
Mamiya 645 80mm f/1.9: Lens Out of Focus Tolerance
This Mamiya 645 w/80mm f/1.9 lens came into the shop with a complaint of poor focus. In checking the lens, I found it to be plus 0.16mm out of tolerance as…
Focus Fixtures for Adjusting Mamiya Lens Infinity
My once a year dusting of focus fixtures. The tools are used to adjust focus on Mamiya medium format and 35mm lenses. Each fixture has a small mirror at…
Mamiya 645 PRO Mirror Stop: Pitfalls of 3D Printed Replacements
While replacing the mirror stop in this Mamiya 645 PRO, I feel it is time to talk about this procedure again. By now, many have decided to replace the…
Mamiya 645 1000S: Corroded Battery Compartment and Broken Latch
This 645 1000s came into the shop for the typical slow film counter return and shutter calibration (I have documented the counter return issue on a…
Fuji GS645W and GS645S Wide 60: Similarities and Differences
Servicing two Fuji 645 rangefinder cameras today that share some body traits. This gives me a chance to show some of the similarities and differences…
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 645 1000S: Film Counter, Light Seals and Calibration
Servicing a Mamiya 645 1000s. This particular example is unusual in that it shows very little wear/use. These were professional tools in the day and often…
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 645 80mm f/2.8: Over-Lubricated Focus Helix and Diaphragm
This 80mm f/2.8 Mamiya 645 lens came into the shop with complaints of stiff and uneven focus and sticking diaphragm blades. On disassembly, I found that…
Mamiya 645: Sticking Film Counter and Light Seal Replacement
Fixing the typical issues with the Mamiya 645: sticking film counter and replacing light seals. A sticking film counter will not always go back to zero and…
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…
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 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 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…
Mamiya 645 80mm f/1.9 Lens: Repairing a Lens in Two Pieces
Mamiya 80mm f/1.9 lens for 645. This lens arrived in two pieces. Not sure how this happened but after some repair to the helical guides, complete cleaning…
Mamiya 645 Pro: Battery Drain Caused by a Loose Spring
This has been a week of Mamiya 645 Super/Pro repairs. I have serviced a lot of these cameras and this is the first time seeing this issue: camera (645 Pro)…