Shutter Count records the number of activations of the ‘current Shutter’.  Each time the Shutter is replaced the Shutter Count should be reset to the new shutter count.  Changing the Shutter Count automatically updates the Replacement History and Camera FAX.  Changing the Shutter Count does not change the Release Count displayed in the camera menu. 

To change the Shutter Count:

1. Type in the new count number …  ‘0’ or other number.
2. ‘Click’ Change and the new Shutter count will be written into the camera.
3. Changing the Shutter Count automatically records the last replacement in the Shutter History and Camera FAX.

Mirror Count records the number of activations of the ‘current Mirror Unit’.  Each time the Mirror Unit is replaced the Mirror Count should be reset to make the count accurate for the new Mirror Unit. Changing the Shutter Count automatically updates their Replacement History and Camera FAX. 

To change the Mirror Unit Count:

1. Type in the new count …  ‘0’ or other number.
2. Click ‘Change’ and the new Mirror count will be written into the camera.
3. Changing the Mirror Count automatically records the last replacement in the Mirror History and Camera FAX.

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Screwdrivers for Japanese Lenses and Cameras

Lenses and cameras require precision crosspoint screwdriver blades built to the JIS (Japanese Industrial Standard). Our JIS blades are engineered to fit the exact crosspoint screws used in cameras and lenses. The most common sizes are 1.7mm, 2.0mm, and 2.5mm—perfect for the delicate work your gear demands.

If you’ve ever searched for "camera repair screwdrivers," you’ve probably noticed a lot of options online. But here’s the catch: most are actually Phillips 00 or 000 blades, not true JIS bits. Using these can strip screw heads, turning a simple repair into hours of frustration.

Our JIS crosspoint blades eliminate that risk. They seat perfectly in JIS screws, ensuring a secure fit every time and protecting your valuable cameras and lenses. Don’t settle for cheap substitutes that wear out screws or ruin delicate equipment—invest in tools designed for the job.

Precision, reliability, and peace of mind: that’s what our JIS screwdriver blades deliver.

See for yourself in these illustrations:

In addition, blade temper is critical to avoid damaging tiny camera screws. A proper JIS blade should fit perfectly, like a socket, gripping the screw securely and the temper must be hard enough for durability, yet flexible enough to avoid damaging the screw head if the screw is overtightened or sealed.

For years, technicians relied on NIWA JIS screwdrivers, renowned for their perfect fit and reliability. But NIWA has been out of business for many years, leaving a gap in quality tools. 

• General-market screwdrivers often striped screw heads, either because they didn’t fit precisely or because they’re too rigid to give when a tiny camera screw was overtightened or sealed.

SPT manufactures JIS crosspoint camera screwdriver blades because professional camera technicians were dissatisfied with what was available on the market. For over 20 years, professional technicians and businesses have ranked our JIS camera repair screwdrivers and blades as the ‘Best Camera Screwdrivers’, praised for their precise fit and unmatched durability.

Our modern JIS blades are the perfect replacement for the old NIWA tools, giving you the same trusted performance without the frustration or risk of damaging your equipment.

Protect your cameras and lenses. Invest in JIS blades built for professionals.

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