Hi Paul,
Sorry for the crappy phone pix, I've got a lot of fires to tend to at the moment---it doesn't help that I still stumble around trying to use my camera phone. Zooming in to 100% via HDMI is done through a simple setting on the HDMI screen on the IQ3 MFDB. Limited controls here. You have the ability to easily focus, focus peaking, zebra settings, and zoom into 100%, but not dragging your finger around to pinpoint a part of the image---at least not by HDMI. No C1 Pro here with the HDMI connected. I simply use the Sidefinder or I can swing the monitor open for viewing. SmallHD includes a tiny wireless remote so you can also access all features on the monitor when using the Sidefinder without having to swing the monitor open to access the controls.
Here, the 5" SmallHD monitor with optional Sidefinder is attached with a AS compatible quick release plate, lever release top clamp, and Giottos mini ball head attached to a Manfrotto Nano clamp. I put gaffers tape on the tripod legs to protect the legs and also it seems to provide a better grip surface for the clamp. The RRS BH-25 is a stronger ball head to use if desired. This is a really inexpensive mounting option compared to some of the other rail options I've seen. Although my XF is used here, the purpose really is to use the HDMI feature with my Cambo. I chose to mount the SmallHD on the tripod leg because if I used the cold shoe, the Sidefinder would sit about a foot too high----problematic for the height challenged.
I can easily focus using the Sidefinder and reaching around to turn the focus ring on the lens. This works really really well. The Surface Pro will travel now doing light duty and emails, and replaced by the SmallHD in the field. Do you need it---no. But it's nice to have options. Kudos to Phase One.
ken
p.s. I'll place bets that a future firmware update brings focus peaking to live view on the IQ3 100MP.....