Testing
49 posts tagged Testing. Search within these →
UV Filter Test: K&F Concept vs B+W
This is a tale of two filters. Both are UV filters and one is inexpensive and the other a much more costly choice. Which one will be the higher quality…
Mamiya 7: Cracked Top Cover and Windows, Kenco Filter Test
Two items that win in the weekly catagories for 1.) most damaged camera and 2.) poorest quality filter. The Mamiya 7 in the first photo not only had a…
RB67 Lenses: Testing for Delayed Firing and Oily Shutter Blades
get a lot of email and messages on my website regarding repair of RB67 lenses. Not surprising since the RB has been around since 1970 and there is a large…
Testing a 3D Printed O.Zone Mark 8 Body for Mamiya Press Lenses
We recently printed a copy of an O.Zone Mark 8 camera body designed by @o.zone69 This body was made to accept Mamiya Press lenses and has a Graflok back to…
Mamiya 7 Lenses: Inspection After Impact Damage
These three Mamiya 7 lenses came into the shop today for checkout (along with a Mamiya 7 body) as my client mentioned that the body had some impact damage…
Mamiya 7II: Two Bodies Unrepairable from Impact and Water Damage
Some of the cameras coming into the shop are not repaired due to major trauma that may not be economical or possible to repair. These are usually impact or…
Mamiya 7: Testing Aperture Priority Auto Exposure
One of the battery of tests that are done on the Mamiya 7/7II on intake is check of the light meter automatic setting. On the Mamiya 7/7II this is an…
Mamiya 7 Lens Checkout: Rangefinder Cam, Flex Cable and Filter Tests
Probably the most commonly done service here in the shop is rangefinder check/adjust on Mamiya 7 cameras and lenses. This outfit came in with complaints of…
Mamiya C TLR: Missed Frames from Oily Shutter Blades
common complaint that I hear about is missing frames when using a Mamiya C series TLR camera. Generally, this is caused by sticking shutter blades. The…
RZ67: Diagnosing Shutter Not Releasing, Mechanical or Electrical
A very common issue with the Mamiya RZ67 is that the shutter does not release. This is usually caused by the mirror not releasing and can be a mechanical…
Mamiya 7II: B Setting Failure and Battery Drain
This Mamiya 7II arrived with two issues: 1.) B shutter setting did not work and 2.) Battery drain. Turns out they were related problems. The camera, owned…
UV Filters on Mamiya 7 Lenses: Testing for Parallel Surfaces
This is a tale of two filters and why I feel it is important to get high quality UV filters. When lenses come into the shop with a UV/Sky filter installed…
Mamiya 7 65mm Lens: Testing for a Broken Flex Cable
This post is another one about the Mamiya 7 65mm lens. I see a lot of these lenses in the shop with the issue of a broken flex cable. If you are purchasing…
Mamiya 6: Checking the Light Meter for Auto Exposure Errors
A Mamiya 6 came into the shop with a complaint of incorrect exposure on the A setting. The first photo shows the pieces necessary for checking the light…
RB67 Lenses: Overexposure from Slow Closing Shutter Blades
I constantly see RB67 lenses with this complaint: overexposure in bright light. In almost every case, this is caused by the shutter blades not closing down…
Mamiya 7II: Dropped Camera, Stuck Rangefinder and Flange Check
This Mamiya 7II outfit came in for examination after being dropped. The immediate symptom was that the rangefinder would not move. And the 80mm lens was…
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…
645 Pro: Intake Testing of Shutter Speeds
When a camera comes into the shop I like to do a function test on intake to get an idea of its health. This 645 Pro is shown having shutter speeds checked…
Mamiya 7 65mm Lens: Replacing a Broken Flex Cable
This Mamiya 7 65mm lens came into the shop with a very common issue: broken flex cable. This cable connects the shutter to the camera connection pins on…
Lens Filter Quality: Testing UV and Skylight Filters
This post is about lens filter quality. There seems to always be a debate about whether UV or Skylight filters should be used on a lens. I'm not going to…
RZ67II vs Mamiya 7: Measuring Camera Vibration
This is a post about vibration analysis. I happen to have these two cameras on the bench (Mamiya RZ67II and Mamiya7) right now so thought it would be a…
Mamiya 7II With Impact Damage: Not Repairable
Some cameras that come into the shop I feel are not repairable. This Mamiya 7II suffered impact damage: cracked top cover, rangefinder mostly inoperative…
Mamiya 7 43mm Lens: Checking the Rangefinder Cam
I was recently asked about my process for evaluating lenses for the Mamiya 7. In addition to other inspections, every lens has an initial check up of the…
Mamiya C TLR Lens: Two Shutter Checks You Can Do
Here are a couple of ways to check if your Mamiya C TLR lens needs service: 1.) In the first video, the shutter is released while the cocking lever is held…