Ultrasonic vs. optical rangefinder Many hunting rangefinders use laser or GPS technology, but some use traditional optical or ultrasonic technology to measure distances.

Optical binoculars use surrounding objects and the depth of the target. Ultrasonic rangefinders deploy a signal to a target and calculate the time it takes to return to itself to determine distance.

Ultrasonic vs. optical rangefinder Many hunting rangefinders use laser or GPS technology, but some use traditional optical or ultrasonic technology to measure distances.

Optical binoculars use surrounding objects and the depth of the target. Ultrasonic rangefinders deploy a signal to a target and calculate the time it takes to return to itself to determine distance.

Optical binoculars use surrounding objects and the depth of the target. Ultrasonic rangefinders deploy a signal to a target and calculate the time it takes to return to itself to determine distance.

Optical binoculars use surrounding objects and the depth of the target. Ultrasonic rangefinders deploy a signal to a target and calculate the time it takes to return to itself to determine distance.

And to compose the photo, there's an old-school optical rangefinder rather than an electronic viewfinder. "The digital camera hasn't changed much since the 90s," says PIXII's David Barth.

Replacing the rangefinder with an EVF will doubtless streamline the whole process of shooting on an M camera (even though I suspect the M11-V will remain manual focus), but I also think it risks ...

Optical binoculars use surrounding objects and the depth of the target. Ultrasonic rangefinders deploy a signal to a target and calculate the time it takes to return to itself to determine distance.

Optical binoculars use surrounding objects and the depth of the target. Ultrasonic rangefinders deploy a signal to a target and calculate the time it takes to return to itself to determine distance.

Optical binoculars use surrounding objects and the depth of the target. Ultrasonic rangefinders deploy a signal to a target and calculate the time it takes to return to itself to determine distance.