I don't know what the Graphic had out of the factory, as it was a second-hand purchase and could have been changed before my grandfather ever bought it. The Schneider isn't exactly typical of what was
used on the Graphics, since I read that pressmen liked to use wider lenses, but a 150mm is a normal lens for this format. It doesn't hold especially well, though. The weight isn't the problem so much as it's supporting the weight with an off-center,
flexible handle. The strap wants to let the camera sag to the right and I constantly have to fight it, which puts strain on my wrist. To be a handheld, the Graphic really wants a rigid handle in place of the strap, and probably another one on the flash mount over the rangefinder housing. That isn't a terribly complex task, though. And in the unlikely event you find yourself in Maine, you should certainly call on me to go shooting.
The Konica is heavy because it's a big camera with a lot of mechanical bits. The back is the size of two 35mm SLR bodies but half again as thick, and then there's the focusing block/lens mount and the lens. The film advance is big - the rack arm runs the width of the camera, and then the connection with the shutter has to run all the way out into the focusing block/lens mount. There are interlocks between the dark slide and the lens, back, and shutter to prevent inadvertent exposure of the film. The rangefinder is full-width, and the assembly is 1/3 of the body's size. It's just a beast of a camera, as far as handhelds go.
The Autographic lacks the stylus, sadly, and the cable release as well. Plus, with the bellows in the shape they are, it's not usable even if I wanted to shell out to get some 116 film custom-cut. Repair or conversion aren't worthwhile because the overall quality of almost all Kodaks is 'good' at best (they
were mass-market cameras, after all), and since I only want usable cameras I'll try to unload this to a collector at a modest price. I did see a Number 2a in pristine condition - new bellows and all the doodads - in an antique store once, but the totally obsolete format is still a deal-breaker. I bought the Zeiss and the Jiffy instead.
I looked up your Zenit and it turns out that the E types didn't have any kind of focusing screen - you'd use sharpness or scale focusing, and that's it. I don't know if there'd be a place to fit a replacement focusing screen if you took off the top plate and prism. It's too bad that it's difficult to use, though - if it's newer than 1968, it's got the M42 screwmount and you could avail yourself of the really awesome Super-Taks and a lot of other good-but-old lenses.