What would you guys suggest for HDMI to SDI adapters that would be portable, possibly even on camera, definitely battery powered.

i use these cheap ebay SDI/HDMI converter with a plate adapter for a sony NP-Fxx battery.
works fine for hours.
Take care to choose the right converter since they look the same (hdmi-->sdi or sdi-->hdmi)

Battery Adapter Mounting Plate fr NP-F970 F750 F550 Sony Battery 970 DSLR Rig | eBay (http://www.ebay.com/itm/Battery-Adapter-Mounting-Plate-fr-NP-F970-F750-F550-Sony-Battery-970-DSLR-Rig-/251666854031?hash=item3a9883708f:m:mgv3m6goh60JBxmpnM9PCVw)

I've been using a Blackmagic SDI - HDMI mini converter on camera, but they also have an HDMI - SDI version.

Atomos makes a little one that's powered by Sony NP series batts. Actually they make 2 for the 2 directions HDMI/SDI. About $100 IIRC.

The Atomos Connect converters run $195 and use Sony-type camcorder batteries.

Black Magic now offers "Micro" converters for HDMI > SDI and vice-versa, $85 each. They have a micro USB port for power, so one can use any of those inexpensive battery packs meant for recharging cell phones. AC adapter included.

Thanks

Jeff

Ah lots of great solutions! Thanks guys, I'm going to give a couple of them a try.
Cheers!

I figured out this was a way to mount my Atomos Connect to my Canon XF 300. The good news that I discovered yesterday, is that same flat screw you see (that I cut short with a saw) screws into my DSLR setup

Albiet my Atomos/setup is not working at the moment, at least it's pretty on the setup. :}

The Feelworld (Seetec) converters also have a Sony NP battery plate built in.

Nice construction includes 1/4-20 mounting holes.

Camera Motion Research Amimon Connex Wireless Antenna and Transmitter (http://www.camotionllc.com/sdi/)

Rich Greb
CMR