Marking Zone/Hyperfocal Distances on A Helicoid

[Darryl Roberts]

Hi,

I'm sold on getting a Chroma Camera Snapshot, the main reason, it's weight.

In this video, Mr. Henson eludes on how he set up the distances. With the camera do I place an object out front and start measuring with the closest then keep moving it out? Also, is the end, of the twist "infinity?"

Any answers, including YouTube links, are greatly appreciated.

 

[blee1996]

I did build a couple cameras by using ground glass and measuring tape to mark the distance on the focusing helicoid. It is not that difficult:

- You secure your camera on a tripod, with ground glass installed
- I use a big piece of white cardboard, with black tape to mark a target, well lit
- I start with 3ft, get focus right on the ground glass, and use white permanent pen to mark 3ft on the helicoid
- Then I repeat for 6, 9, 12, 15 ft
- I use a tree, tv tower, or whatever is miles away to calibrate Infinity

Note: you can add a few more distances, especially between 3-6 feet. But otherwise you don't have much space to write on the helicoid, plus the hyperfocal will take care of those.



For Depth of Field and hyperfocal, I just download one of the online DoF calculators, input my film format, lens's focal length, and print out a simplified version for my own custom camera. Then laminate it and glue to the back of my camera.

 

[Darryl Roberts]

I did build a couple cameras by using ground glass and measuring tape to mark the distance on the focusing helicoid. It is not that difficult:

- You secure your camera on a tripod, with ground glass installed
- I use a big piece of white cardboard, with black tape to mark a target, well lit
- I start with 3ft, get focus right on the ground glass, and use white permanent pen to mark 3ft on the helicoid
- Then I repeat for 6, 9, 12, 15 ft
- I use a tree, tv tower, or whatever is miles away to calibrate Infinity

Note: you can add a few more distances, especially between 3-6 feet. But otherwise you don't have much space to write on the helicoid, plus the hyperfocal will take care of those.



For Depth of Field and hyperfocal, I just download one of the online DoF calculators, input my film format, lens's focal length, and print out a simplified version for my own custom camera. Then laminate it and glue to the back of my camera.

Wow, awesome thank you very much