Nikon SLR Camera Right-Angle Viewing Attachment Model 1
WHAT CONDITION THE CONDITION IS IN: 88-Day Confirmed Operation Warranty. Fully functional and well maintained, this item shows minimal wear. Optics show light dust typical for its age. Keep scrolling for the full story, or skip ahead to the photo. We won’t judge. Much.
The Nikon Right-Angle Viewing Attachment (Model 1) is one of those objects that rewards a second look. This is, of course, precisely its purpose. Born in the early 1960s during the storied Nippon Kogaku era, this silver-knurled, brass-and-steel accessory was built for the Nikon F and Nikkormat series at a moment when Japanese optics were quietly rewriting the rules of professional photography. The engineers in Tokyo, it seems, weren't in the habit of cutting corners.
It delivers a 1:1 magnification through a roof prism that renders an upright, un-reversed image with the kind of lateral accuracy that waist-level finders could only dream about. It also rotates a full 360 degrees on its 19mm threaded mount, because why commit to just one angle when the universe offers so many?
The brass-and-steel construction, so charmingly indifferent to the plastics revolution that would follow, means that surviving examples routinely emerge from camera bags and estate sales after fifty-odd years in fighting shape. Labeled by Japanese collectors with the affectionate designation 初期型, or "Early Type," their optical coatings are perhaps a touch warmer than later DR-series descendants. This is less a flaw than a kind of personality, the optical equivalent of a distinguished amber in a well-aged whisky.
Later versions would go all-black and update the knurling, but this original, with its "Nikon Japan" branding and notched rotation ring, was the one that earned its keep on copy stands, macro rigs, and laboratory benches, doing the serious, unglamorous work without complaint.
Technical Specifications
Manufacturer: Nippon Kogaku K.K. / Nikon (Tokyo, Japan)
Product Model: Right-Angle Viewing Attachment (Model 1 / "Early Type" 初期型)
Production Era: Circa 1959–1968 (Pre-DR series, original Nikon F era)
Mounting Interface: Standard 19 mm screw-in circular viewfinder eyepiece thread
Optical Design: Precision roof prism (Amici / Dach prism configuration) with single-layer anti-reflective optical coatings
Image Orientation: Upright (erect) and laterally correct (unreversed left-to-right)
Magnification Ratio: 1:1 (1.0× true viewfinder reproduction)
Rotation Mechanism: Full 360° continuous rotation with a notched knurled retention ring for vertical, horizontal, low-angle, and overhead shooting
Diopter Adjustment: Built-in rotating helical eyepiece collar (approximately -5 to +3 diopters) for eyesight calibration without correction lenses
Chassis Construction: Solid machined brass and steel casing with polished silver diamond knurling and black enamel finish

