Focus
45 posts tagged Focus. Search within these →
RZ67II: Scraping Broken Fine Focus Gear Teeth From Main Gear
Servicing a Mamiya RZ67II body. Replacing a broken fine focus gear. When the gear teeth break, they become embedded in the metal main focus gear and often…
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 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 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…
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…
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 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…
Hasselblad 80mm CF Lens: Sticking Shutter, Broken Cocking Shaft
Hasselblad 80mm f/2.8 CF Lens Repair. This lens came into the shop with multiple issues: focus ring goes through infinity by quite a bit, shutter sticking…
Mamiya CS 50mm f/1.4 Lens: Oil on the Front Element
This Mamiya CS 50mm f/1.4 lens had a bit of oil residue on the back of the front element as seen in photo two. Repair was straightforward, remove and clean…
RZ67 Pro II: Checking a Complaint of Unsharp Photos
This Mamiya RZ67II came into the shop with a complaint of unsharp photos. When I receive a camera with this type of problem mentioned, I do a visual check…
Mamiya 80mm f/2.8 S C Lens: Swapping a Shutter Missing Parts
A Mamiya TLR 80mm f/2.8 S lens came into the shop for routine cleaning. On opening the shutter I discovered that someone had "borrowed" several parts from…
RZ67 Pro II: Straightening a Bent Focus Shaft
This RZ67II had impact damage to the left focus knob. The knob was slightly damaged (needed to be replaced) and the focus shaft was bent. The first video…
Hasselblad 50mm Distagon: Not Focusing to Infinity
This 50mm Hasselblad Distagon (circa 1962) came in a bit battered and rough and would not focus to infinity. It's not a good sign when you see a lens with…
Hasselblad 500C: Installing a Beattie Brightscreen
Installing a Beattie Brightscreen in an early (1963) Hasselblad 500C. From 1957-1969, the Hasselblad focus screen assembly consisted of eight separate…
Mamiya 645 Super: Setting Mirror Angle After Stop Replacement
A broken mirror stop is a common repair on the Mamiya 645 Super, Pro and Pro TL. After replacing the stop, the mirror needs to be set to a 45 degree angle…
Mamiya 80mm C Lens: Adjusting Focus with Autocollimator and Shims
After replacing a set of elements on an 80mm Mamiya C lens, an autocollimator and a special fixture is used to check and adjust focus using shims from…
RZ67 Pro II: Damaged Fine Focus Gear and New Replacement Gears
This Mamiya RZ67II came into the shop with a damaged fine focus gear, not an uncommon issue. Over the last few months, we have designed and fabricated new…
Stiff Focus Issues on Mamiya Lenses
Most of the lenses coming into the shop with stiff focus problems are either 645 lenses or Press Universal lenses. This is caused by the focus helicoid…