Frequently Asked Questions
Collector inquiries and technical maintenance.
How often do mechanical shutters need servicing?
Mechanical shutters typically require a CLA (Clean, Lubricate, Adjust) every 10 to 15 years, depending on use. Vintage lubricants can dry up or congeal, causing the slow speeds (1 sec to 1/15th) to drag or stick open completely.
What is the difference between leaf and focal plane shutters?
A leaf shutter is built into the lens housing using interlocking metal blades; it can sync with flash at any speed. A focal plane shutter sits inside the camera body just in front of the film, utilizing cloth or metal curtains. Focal plane shutters generally offer faster top speeds (e.g., 1/1000th) but are limited in flash sync speed.
Why does my rangefinder patch look faded?
The semi-silvered mirror inside the rangefinder assembly degrades over time due to oxidation or desilvering. While some collectors use a small piece of colored gel over the main window to increase contrast, a permanent fix usually requires re-silvering or replacing the beam splitter prism.
What does "balsam separation" mean in vintage lenses?
Older lens elements were cemented together using Canada balsam, a natural tree resin. Over decades, temperature fluctuations can cause this cement to yellow or separate, creating a rainbow-like or cloudy artifact inside the lens that degrades contrast.
Can I use modern batteries in older light meters?
Many classic cameras from the 1960s and 70s relied on 1.35v mercury batteries, which are now banned. Modern alkaline batteries (1.5v) will cause the meter to read incorrectly (usually over-exposing). You must use zinc-air batteries, a voltage adapter, or have the meter's internal circuit recalibrated with a diode.
What is "mirror desilvering" on SLRs?
The reflex mirror in an SLR is front-silvered (the reflective coating is on top of the glass, not behind it, to prevent ghosting). Because it is exposed, it is highly susceptible to scratches and oxidation. Never clean an SLR mirror with standard harsh chemicals or rough cloths.
Is it bad to leave my mechanical camera cocked?
Yes. Leaving a mechanical shutter cocked (wound) for extended periods (months or years) keeps the tension springs compressed, which can eventually weaken them and lead to inaccurate shutter speeds. Always fire the shutter before storing the camera.
What is a light leak?
Light leaks occur when the foam or felt light seals around the film door degrade into a sticky residue, allowing ambient light to strike the film. This results in red, orange, or white streaks on the developed negatives. Replacing light seals is a common and relatively easy maintenance task.