Our custom made "T-Minus" rings get their name from the fact that they are shorter than the "T2" standard. In this case about 1" shorter than a standard length "T2" Ring. This is also a WIDE Ring and is equipped with 48mm (.75 pitch) threads. Your adapter must have 48mm threads to use it. Normal T-Rings for MIL type cameras are typically 30-38mm deep. Our "T-Minus" rings are only 10mm deep. This is very useful for reflector owners who often don't have quite enough focus range to reach focus with a camera. They are also useful anytime you can use some extra focus room, such as for using a flip mirror or other accessory on a refractor. A T-Minus ring couples your camera body to a T-Adapter or other camera mount. Each camera manufacturer has a different bayonet mount, which requires a specific T-Minus Ring. These solid single piece T-Rings are CNC machined of aluminum with a durable black anodized finish.
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