What the thread found

• The Letus Extreme adapter functions well for its price point compared to other 35mm adapters on the market.
• Total investment for a complete setup with the Letus Extreme adapter, lenses, and accessories typically ranges between 4000 and 5000 dollars.
• The Letus Extreme uses a vibrating ground glass mechanism.
• The Letus Extreme restricts aperture operation to f5.6 or wider and shutter speed to 250 or slower to avoid seeing the ground glass.
• A higher-priced Letus model with a spinning glass mechanism costs approximately 3500 dollars more than the Extreme version.
• The Extreme version relies on the mounted lens for back focus adjustment, while the Ultimate version has its own back focus adjustment mechanism.
• Thirty-five millimeter adapters in general offer limited customer support from manufacturers.
• The adapter balances adequately on a steadicam but requires rear-mounting of the follow focus system.
• The Extreme model cannot be used with B4 mount cameras due to its back focus design.

Depends on

• The discussion dates from 2008 and adapter technology may have evolved.
• Claims about upcoming B4 mount versions were speculative and unconfirmed at the time of posting.
• No independent testing data provided, only user reports and rumors.
• Comparison with Pro 35 model mentioned but not thoroughly detailed.
• The recommendation to avoid Redrock adapters is stated without explanation.

Parts

Follow Focus

Same gear or parts

1. 2026Pulling focus and zoom yourself while operating, especially on live showsOperator practice
2. 2026Swapping an ARRI ALEXA 35 between tripod/studio and Steadicam® mounting: baseplate choice and fastest workflow.FacebookSteadicam operators group
3. 2025LC-1 (Lens Control-1) follow focus system: wired architecture, motors, and early operational experience (1990s).FacebookThe Steadicam Group
4. 2024Modifications to a Steadicam Scout rig for expanded power distribution and connectivityGeneral Discussion