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IBE HDx35 B4 - PL Lens Adapter / Doubler MK II

The HDx35 Mark II adapts from B4 to a Universal Mount System. Available mount options include ARRI PL, Canon EF, Nikon F, Sony E and Micro Four Thirds.


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The HDx35 mk II is an optical adapter that enables B4-mount 2/3” HD video lenses to work with most Super-35 format large sensor cameras. The Mark II system has increased coverage to work with more cameras, and now includes the Universal Mount System (UMS).

Broadcast lenses are available in high zoom ratios with wide apertures in a relatively compact size, making them a desired option for many large-sensor camera users. Designed and built by IB/E Optics, HDx Optical Adapters mount between a B4-mount 2/3” lens and a large sensor camera, expanding the projected light to cover the image area. HDx Optical Adapters increase the focal length of the attached video lens so that the expected field-of-view of the lens is maintained on the larger format sensor. The depth of field of the image will be closer to that of the larger format.

All HDx Optical Adapters optically correct for the different spectral alignments between three-chip prism block sensors, for which the B4-mount lenses were designed, and the single sensor of the large sensor cameras. HDx Optical Adapters are highly telecentric in design, delivering a bright, sharp image across the entire frame, with excellent color and contrast.

The HDx35 mk II adapts from B4 to a Universal Mount System, which allows the HDx35 mk II to be mounted on a wide variety of large-sensor cameras without shop service. It ships standard in ARRI PL, with available adapter mount options including Canon EF, Nikon F, Sony E, and Micro Four-Thirds. The Mark II includes a 3/8-16 threaded hole and two posts for lens support.

The HDx35 Mark II expands a B4-mount lens image by approximately 2.7 times, covering:

Vision Research Phantom:
Flex, v642, v641, v341 (up to 2560x1440)
HD Gold (up to 2048x1112)

C500, C300, C100

ALEXA (16x9 & 4x3)

F65, F55, F35, F5, F3, SRW-9000PL, FS700, FS100

Scarlet & Epic (up to 5K 16x9)

Effective aperture is lowered by approximately 2.5 stops. Please visit our Specifications Page for a complete list of camera frame diagonals.

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Camera Model       Camera Frame Diagonals (in mm)
Phantom   Flex (2560×1440)   29.4
    v641 (2560×1440)   29.4
    v642 (2560×1440)   29.4
    HD Gold (2048×1112)   29.1
Canon   C100   28.2
    C300   28.2 
    C500    28.2
Arri   ALEXA (4×3)   29.7
Sony   F3   27.1
    F35    27.1 
    F65    27.1 
    FS100    27.1 
    FS700    27.1 
    SRW-9000PL    27.1 
    F5    25.9 
    F55    25.9 
RED   One (4K 16×9)   25.4 
    Epic (5K 16×9)   29.7 
    Scarlet (5K 16×9)   29.7 


HDx2 Mark II Optical Adapter

Minimum Image Circle Projection: 25.5mm

Camera Model   Camera Frame Diagonals (in mm)
Phantom   Flex (1920×1080)   22.0
    v341 (1920×1080)   22.0
    v641 (1920×1080)   22.0
    v642 (1920×1080)   22.0
    Miro M120   22.0
    Miro M320S   22.0
    Miro LC320S   22.0
Panasonic   AF100   21.6
RED   One (3K 16×9)   19.0
    Epic (3K 16×9)   19.0
    Scarlet (3K 16×9)   19.0
Blackmagic Design    Cinema Camera   18.1