F-Zero HD Ground Glass Lens Adapters and no safety concerns because

and no safety concerns because the RF62 grips the entire lens barrel rather than trying to rely on a few short millimeters of decades-old threads in varying condition

Helical movement can be done in both clockwise OR counter-clockwise motions

there wasn't

The RF62 can be set to extend linearly (push/pull the lens forward/backward) or in a helical manner (twist the lens barrel to extend/retract

If you're unsure about compatibility

F-Zero HD Ground Glass Lens Adapters and no safety concerns becauseAt the heart of the F Zero Camera is our High Definition Ground Glass. This sheet is where the intermediate image is projected, so it's imperative that the glass has high enough resolution to capture it. After many months of testing every commercially available glass on the market, we eventually realized that if we wanted a pristine image, we'd have to develop something new. This is the result. An 8x10" quartz based sheet just 1. 9mm thick for ultra