Key new points:
1) The awesome single ended HPL750 from the Source 4. Probably similar in brightness or slightly better than the 1K with less power draw. Single ended means cleaner beam already plus it gets the Arrimax style reflector, which from what I've seen lately is very good.
2) Aluminum housing - THANK GOODNESS! No more melted plastic goo on the floor and expensive replacements. For whatever reason, no one ever listens to the rental house (or reads the very clear instructions on the yoke) about leaving the top/bottom Chimera flaps open. Now I just have to worry about the Chimera getting cooked - but no melted goo! I personally dislike the Mickey Mole's steel housing, but I quite like the ETC Source 4 Par's aluminum housing - I think this one will be a winner.
3) Built in "speedring" basically for Chimera Video Pros. This is fantastic. Less items to lose.
4) Same accessory/scrim size as the 650 Plus fresnel. Genius.
5) Nice plastic handle on rear for adjustments while hot. I've got to give it to Colortran for putting these on fixtures as far back as the Cine Queen - but their plastic mix was lacking, which meant they cracked rather easily. The the handle on the rear of the Source 4 works quite well, so I would imagine this will be a nice addition with the advantage of modern plastics.
Not sure about the single arm yoke, will just have to see about that. I have some Strand/Quartzcolor Bambino 500 fresnels (basically same as Arri 300 Plus) that are single sided and work very well - but we don't hang Chimeras on the front of them either. The brake disc style yoke looks nice. The new 2K fixture looks pretty nice also, with it getting an aluminum housing and the new reflector as well. No built in speedring for 2K though, bummer.
Edited by Michael E Brown, 07 October 2010 - 08:30 PM.