Iris control for B4 Lenses

Extend the functionality of the SKAARHOJ ATEM CCU or ATEM CCU Lite panel with an ETH-B4 Link to control iris on a B4 lens. With this great add-on you now get the best of both worlds – full camera control together with iris control for your favorite analog B4 lens.


With the ETH-B4 Link you have the power to control iris on an analog B4 lens mounted on the URSA Mini and Studio Camera series from BlackMagic Design. You connect the lens via the Hirose 12pin connector (see details below), which provide power to the lens and let you adjust iris via the ATEM CCU or the ATEM CCU Lite. Camera number is selected via the selector switch - we even managed to provide preview tally via the 3-pin phoenix connector! Please note the ETH-B4 Link is an upgrade of the well know ATEM-B4 Link, and it inherits almost all of the same features. The ATEM-B4 X model is no longer available.

  • Hirose 12-pin connector
  • Tiny form factor
  • Set camera number via selector switch
  • Preview/program tally information from small LED on both sides
  • Preview tally from 3-pin phoenix connector: Ground, IO, 12V (VIN)
  • Test mode for iris and preview tally - see video
  • Completely self contained unit with SKAARDUINO inside
  • Tested to work with a 100m CAT5e cable.
  • Durable enclosure with blue anodized aluminum plates
  • Compatible with Studio Camera series and URSA Mini
  • 100% Creative Commons/Open Source design (CC-by-sa or GNU/GPL)
  • Dimensions: 5.2 x 5.6 x 2.5 cm
  • Weight: 0.080 kg

 

Selector Switch Functions

Selector switch 1-8 = Camera 1-8
Selector switch 9-C = Deactive
Selector switch D = Test mode
Selector switch E = Reset calibration to factory default
Selector switch F = Calibration (will find iris end points)

The Hirose 12pin connector supports most B4 lenses, but it’s your own responsibility to check that your particular lens has the features described below. Two example pin outs are given to the left from manuals for cameras and lenses, so you should be able to look up and check similar information for your lens.

The SKAARHOJ ETH-B4 Link box will:

  • Pass on the DC 12V input to the lens with GND going to pin 3 and 12V going to pin 6
  • Adjust the lens iris with an analog value between 2.5 and 7.5V going out on pin 5 (output to lens)
  • Read back the iris position as an analog value from pin 7 (input from lens)
  • Enable iris adjustment from the B4 Link box by pulling pin 6 to 5V through a 10 K resistor. To turn of iris adjustment, it will short pin 6 to ground
  • Notice: The lens may have a “Manual / Auto” button which must typically be in Manual for this to work. In auto you may find that the lens always adjusts the iris to whatever value it receives from the B4 link box

 

Please be aware you might expect vignetting depending on your lens, the sensor size and the type of mount adaptor used. SKAARHOJ takes no responsibility in this regard. Check with your camera/lens supplier.

The ATEM CCU or the ATEM CCU Lite are required as base stations. Two ATEM CCU Lite controllers can work together to operate up to 8 cameras. The ATEM CCU can also operate up to 8 cameras. The ATEM CCU can be used as an master station simultaneous with a ATEM CCU Lite controller. Iris adjustments made in the Software Control Panel will be reflected on the ETH-B4 Link Micro (CCU or CCU Lite still required).

The ETH-B4 Link Micro will work on cameras other than the BMD Studio Cameras, but only for iris control.


Buy Now

Buy a fully assembled controller ready to work out of the box.

What you get is:

  • Fully Assembled ETH-B4 Link
  • Web Interface
  • 12V Power Supply
  • Networking cable
  • USB programming cable
  • Manuals and Software: See skaarhoj.com/support/manual

Designs and Options are:

  • 1 x ETH-B4 Link Micro: MSRP $499,00 USD
  • 2 x ETH-B4 Link Micro: MSRP $999,00 USD
  • 3 x ETH-B4 Link Micro: MSRP $1.399,00 USD
  • 4 x ETH-B4 Link Micro: MSRP $1.899,00 USD

 

You either place your order by PayPal or by email and pay by bank transfer - please read the "Pricing, Terms and Conditions" page for more details.

Models and Options