Nikon D90 lens mount_LTM The Nikon Right Angle Viewing

The Nikon Right Angle Viewing Attachment is a small 90-degree viewfinder extension

this one is such a viewfinder and should fit the bill

Original Leitz instructional manual for the Leica M5

Nikon 250-exposure cassette loader

Nikon D90 lens mount_LTM The Nikon Right Angle ViewingThe Nikon D90 is a good quality DSLR camera with a 12mp DX format sensor and pretty solid compatibility with Nikon F mount lenses, from the earliest AF models to some of the newest (minus the E type and AF P models). If you don't care about metering, you can use most lenses all the way back to the earliest pre AI models. Video? Yes, kind of, but it's 720P and not very good. This D90 is in excellent condition, with only very minor wear and under 5500