Jump to content


Photo

the poor-man HMI


  • Please log in to reply
24 replies to this topic

#1 Walintino Nording

Walintino Nording
  • Basic Members
  • PipPip
  • 29 posts
  • Director

Posted 07 January 2007 - 07:18 PM

hi ,
anyone knows what s the poor man way to replace HMI ? in fact i have no other solution !

thanks

w
  • 0

#2 David Mullen ASC

David Mullen ASC
  • Sustaining Members
  • 19759 posts
  • Cinematographer
  • Los Angeles

Posted 07 January 2007 - 07:37 PM

anyone knows what s the poor man way to replace HMI ? in fact i have no other solution !


Poor man's HMI? They're called reflector boards...

It's a big problem: besides reflectors, your typical choices are daylight-balanced fluorescents or putting blue gel on tungstens. Blue-dipped photoflood bulbs sort of fall into the second category. There are also daylight-balanced LED's, but I can't say they are cheaper than HMI's.
  • 0

#3 Walintino Nording

Walintino Nording
  • Basic Members
  • PipPip
  • 29 posts
  • Director

Posted 07 January 2007 - 07:49 PM

it s a big problemes yes !
i am shooting in 16 mm , in-doors location .
if both fluorescents and the blue gel on tungstens ? but i am affraid of the amateur effect . unless a trick with the film , or hardkor contrast ?

tks

w
  • 0

#4 John Carreon

John Carreon
  • Basic Members
  • PipPip
  • 90 posts
  • 1st Assistant Camera
  • Orange County, CA.

Posted 07 January 2007 - 07:54 PM

it s a big problemes yes !
i am shooting in 16 mm , in-doors location .
if both fluorescents and the blue gel on tungstens ? but i am affraid of the amateur effect . unless a trick with the film , or hardkor contrast ?


Hello,

Depending on how many windows you have, you could gel them to match Tungsten...most likely it'd be cheaper then renting a bunch of lights.

Then all your color-temperature would match...that is if you're using tungsten lights for inside.

John
  • 0

#5 greg bates

greg bates
  • Basic Members
  • PipPip
  • 22 posts
  • Cinematographer

Posted 07 January 2007 - 08:21 PM

I've seen a few people using these alzo lights. I'm going to pick up at least one of the bigger ones and give it a try.

http://alzovideo.com/
  • 0

#6 Walintino Nording

Walintino Nording
  • Basic Members
  • PipPip
  • 29 posts
  • Director

Posted 07 January 2007 - 08:21 PM

in clear ; No HMI = No try
yep !
having some should be a priority ,
those in the pic are there trusted for serious stuff ?

Edited by Walintino Nording, 07 January 2007 - 08:25 PM.

  • 0

#7 Jonathan Bowerbank

Jonathan Bowerbank
  • Basic Members
  • PipPipPipPip
  • 2815 posts
  • 1st Assistant Camera
  • San Francisco, CA

Posted 08 January 2007 - 12:33 AM

in clear ; No HMI = No try
yep !
having some should be a priority ,
those in the pic are there trusted for serious stuff ?


Too broken for me to reply to this directly...however

Get a large source tungsten lamp and a full CTB, you'll be peachy :)

consider a Xenon too
  • 0

#8 greg bates

greg bates
  • Basic Members
  • PipPip
  • 22 posts
  • Cinematographer

Posted 08 January 2007 - 12:45 AM

You can do a search over at DVXuser and dvinfo to see what other people have used it for. I've seen post from people who have used it in features and music videos. I can't vouch for it as i've never used it...that said i'm in the same boat as a lot of people who can't afford the lost stops of using ctb but need to boost daylight. Terrible quandry for those of us who don't really have rental access to HMI's and flo's just don't have the punch. So for the price and return policy and willing to give these a go.
  • 0

#9 Walintino Nording

Walintino Nording
  • Basic Members
  • PipPip
  • 29 posts
  • Director

Posted 08 January 2007 - 12:49 AM

i have 3 red-head 800 watt , but i need the HMI !
i am sure there is a trick ; Alchimie :)
the secret is the" lamp" inside ? i mean , if i arrange to have the HMI lamp in the red-head . could somthing like that works ?

Edited by Walintino Nording, 08 January 2007 - 12:54 AM.

  • 0

#10 greg bates

greg bates
  • Basic Members
  • PipPip
  • 22 posts
  • Cinematographer

Posted 08 January 2007 - 01:10 AM

i have 3 red-head 800 watt , but i need the HMI !
i am sure there is a trick ; Alchimie :)
the secret is the" lamp" inside ? i mean , if i arrange to have the HMI lamp in the red-head . could somthing like that works ?

No. HMI's require a ballast so your choices are Alzo, Kino (or the like), or the real deal.
  • 0

#11 David Mullen ASC

David Mullen ASC
  • Sustaining Members
  • 19759 posts
  • Cinematographer
  • Los Angeles

Posted 08 January 2007 - 03:02 AM

Maybe this new technology will solve our lighting problems, as long as they can make a 3200K and 5500K version:
http://news.yahoo.co...nt_green_pig_dc
  • 0

#12 Jonathan Bowerbank

Jonathan Bowerbank
  • Basic Members
  • PipPipPipPip
  • 2815 posts
  • 1st Assistant Camera
  • San Francisco, CA

Posted 08 January 2007 - 03:18 AM

Maybe this new technology will solve our lighting problems, as long as they can make a 3200K and 5500K version:
http://news.yahoo.co...nt_green_pig_dc


Very nice ;)
  • 0

#13 David Sweetman

David Sweetman
  • Basic Members
  • PipPipPipPip
  • 757 posts
  • Student

Posted 08 January 2007 - 04:03 AM

Maybe this new technology will solve our lighting problems, as long as they can make a 3200K and 5500K version:
http://news.yahoo.co...nt_green_pig_dc

Crazy, we could start breeding actors for extreme low-light scenarios.
  • 0

#14 Walintino Nording

Walintino Nording
  • Basic Members
  • PipPip
  • 29 posts
  • Director

Posted 08 January 2007 - 08:21 AM

belive it or not ,
i saw -15 years ago - dead bodies lighting like that !
cause of death ; phosphore bomb
it s sad thinking , exuse me if i ask how do you shoot them ? (in war zone , etc.. )

Edited by Walintino Nording, 08 January 2007 - 08:24 AM.

  • 0

#15 Jim Feldspar

Jim Feldspar
  • Basic Members
  • PipPipPipPip
  • 288 posts
  • Student

Posted 08 January 2007 - 09:40 AM

I've seen a few people using these alzo lights. I'm going to pick up at least one of the bigger ones and give it a try.

http://alzovideo.com/

This is from their web site:


"ALZO HMI lights have a very long bulb life (about 7000 hours) so concerns about light failure
during a shoot are eliminated. In addition, as HMI lights age, they do not have the color shifting
issue as with Tungsten."


HMI lights do not color shift with age? What?

Sure, true tungsten (not what most people mean as generalized incandescent but tungsten
filament lamps) get deposits on the inside of the glass that darken the light, but HMIs still
shift about a degree per hour (more blue) right?

Edited by Jim Feldspar, 08 January 2007 - 09:43 AM.

  • 0

#16 Matt Sandstrom

Matt Sandstrom
  • Basic Members
  • PipPipPipPip
  • 464 posts
  • Director
  • Stockholm, Sweden

Posted 08 January 2007 - 10:27 AM

http://alzovideo.com/

i was ready to buy one of their fastbox kits until i realized that the "800" is only a 140, with the "equivalent output of 800w tungsten". i'd rather use kinos in that case, though at the great price i might still get one for car and mobile work since it would run great off a small inverter. i spend so much money renting small basic lights like rifas and kinos that i should really buy one or two.

/matt
  • 0

#17 greg bates

greg bates
  • Basic Members
  • PipPip
  • 22 posts
  • Cinematographer

Posted 08 January 2007 - 11:56 AM

i was ready to buy one of their fastbox kits until i realized that the "800" is only a 140, with the "equivalent output of 800w tungsten". i'd rather use kinos in that case, though at the great price i might still get one for car and mobile work since it would run great off a small inverter. i spend so much money renting small basic lights like rifas and kinos that i should really buy one or two.

/matt

Same boat. I've read other comments on different sites in regards to the 800w estimate being generous. I understand that a HMI is 4x the tungsten equivalent. That would make this lite 6x the tungsten equivalent. The thing I like about it is its compact and would do well on a small 2k genny if you had a couple, even with the larger one. I'll let you know.
  • 0

#18 Jonathan Bowerbank

Jonathan Bowerbank
  • Basic Members
  • PipPipPipPip
  • 2815 posts
  • 1st Assistant Camera
  • San Francisco, CA

Posted 08 January 2007 - 12:42 PM

belive it or not ,
i saw -15 years ago - dead bodies lighting like that !
cause of death ; phosphore bomb
it s sad thinking , exuse me if i ask how do you shoot them ? (in war zone , etc.. )


S'pose you'll need a reflective reading :/
  • 0

#19 Mitch Gross

Mitch Gross
  • Basic Members
  • PipPipPipPip
  • 2873 posts
  • Cinematographer

Posted 08 January 2007 - 04:05 PM

The 800w reference is supposed to be the size tungsten light punching through a CTB gel to equal their light. I agree that it isn't particularly clear.
  • 0

#20 greg bates

greg bates
  • Basic Members
  • PipPip
  • 22 posts
  • Cinematographer

Posted 08 January 2007 - 06:30 PM

The 800w reference is supposed to be the size tungsten light punching through a CTB gel to equal their light. I agree that it isn't particularly clear.

Refresh me Mitch but how many stops would be loss going thru full CTB gel? 800w effectively becomes...?
  • 0


Visual Products

Glidecam

CineTape

rebotnix Technologies

Opal

FJS International, LLC

Ritter Battery

Willys Widgets

CineLab

Gamma Ray Digital Inc

The Slider

Media Blackout - Custom Cables and AKS

Wooden Camera

Metropolis Post

Rig Wheels Passport

Paralinx LLC

Technodolly

Broadcast Solutions Inc

Abel Cine

Aerial Filmworks

Tai Audio

Glidecam

CineTape

Tai Audio

Rig Wheels Passport

Visual Products

Aerial Filmworks

Broadcast Solutions Inc

rebotnix Technologies

Technodolly

The Slider

Paralinx LLC

Wooden Camera

Ritter Battery

Opal

CineLab

Metropolis Post

FJS International, LLC

Abel Cine

Media Blackout - Custom Cables and AKS

Gamma Ray Digital Inc

Willys Widgets