Differences of these Arri light models?

T

themagichoof

Active member
I know I've posted tons of threads lately but this is my last one for a while, seriously :grin:

1) Sometimes there's a 'Plus' in the Arri models. What's the difference between the regular versions and the Plus models?

2) What's the difference between the T1 and ST1 models? (Studio/Location or something?) PS: What is a yoke and what does it do?

3) I understand that a 'stand mount' light is where you mount it on a stand, but the hanging models I'm unsure of. How do you hang these and to which contraption?

4) What's the difference between the manual control and the pole operated models?
 
1) As far as I know, "Plus" just denotes an improvement over the model before it - like a hardware or firmware upgrade that does not significantly change the instrument, but rather adds a new functionality or fixes a defunct one.

2) Tx models come with a yoke and bail block for mounting on a 5/8" baby spud - what most small light stands come with. STx come with DMX control and are made for a studio. They either come with a bail block for stands or a C-clamp attached to the yoke or have a mounting hole for mounting to clamps in a studio's lighting grid. A yoke is the u-shaped thing that allows you to mount the light on other hardware.

3) Studio/stage models will probably come with a C-clamp for mounting to a grid. For TV and repetitive product/green screen work, this is convenient, but for motion picture work, you need a bail block or TVMP adapter to mount them on baby light stands.

4) Pole-operated means the tilt and swing of the yoke and the lighting control (flood, spot, volts-in) can be controlled from a dimmer board via DMX512 (a 5-pin XLR connection). This is key for TV set lighting, stage lighting, or special lighting effects.
 
The Plus model Fresnels take more than one wattage and or voltage of lamp and can be used in 120V or 230V applications.

4) Pole-operated means the tilt and swing of the yoke and the lighting control (flood, spot, volts-in) can be controlled from a dimmer board via DMX512 (a 5-pin XLR connection). This is key for TV set lighting, stage lighting, or special lighting effects.
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Actually, the pole operated versions allow you to tilt and spot and flood the fixture from a split-end light operating pole to keep the gaffer from having to ascend a ladder for every refocus of the fixture. DMX operated fixtures will always be indicated as "DMX" or "WDMX" or another DMX512 moniker.

http://www.arri.com/fileadmin/media...udio_fresnel/TRUE_BLUE_Brochure__English_.pdf

The link above goes into detail on the improvements made to their 1K Fresnel - the casting is different, yielding a lighter, stronger fixture; the yoke braking system is improved for better tilt control; redesigned yoke / stirrup; moveable ears; IP23 rating for water resistance; stainless or alloy materials to improve water / corrosion resistance and on and on.

* The first Arri Fresnels to have DMX control factory-installed AFAIK will be the upcoming L7 series.
 
I guess I've got a lot of reading and research to do. I don't know half of what you guys are saying :P

But it's down to me getting either the T1 or the ST1. One of the biggest differences that I see between the two is that the ST1/studio version has a lens that is 1 inch larger. Would it be worth it to get the studio version instead of the location version?
 
themagichoof said:
I guess I've got a lot of reading and research to do. I don't know half of what you guys are saying :P
Click to expand...
Ah, well this is the right place to learn a bit more. Everybody here learned a lot from somebody else and all of us intend to pay it forward.

Ask specific questions about what you're not clear on yet and let's see if we can help. :)
 
Erik Olson said:
Actually, the pole operated versions allow you to tilt and spot and flood the fixture from a split-end light operating pole to keep the gaffer from having to ascend a ladder for every refocus of the fixture. DMX operated fixtures will always be indicated as "DMX" or "WDMX" or another DMX512 moniker
Click to expand...

Ah, I stand corrected.
 
What is your intended use - on stands or in the air on a grid? The primary difference in a simple hanging fixture is the short cord and no in-line switch. A switch, if any, will be on the fixture body in a hanging model. Depending on mfg. and model, there may or may not be pole-operation receivers for focusing.

Most of us, who are not tied to a traditional sound stage or TV studio, opt for a stand model with ~25' feeder cable, which will often have an in-line switch installed or have a switch on the fixture body.

Also, if you're willing to look at other options than Arri (we're a full-line dealer for them), I've got some stand model 1k, 1k Baby-Baby (hot 1k) and hot 2k Mole Richardson fixtures in clearance stock now that could be a good option. Even the 2k will take a 1k bulb if you prefer to lamp it that way.
 
Late reply, but thanks for the info. There are both stand, hanging, and pole operated models of the Studio version. That goes for the Location model as well. There seems to be no switch (on/off switch I think?). I planned on buying extension cables for the light anyway so the cord length isn't a problem. The main thing is that it's a bigger lens, so if for some reason it was just all around better quality of light or had more features, I'd go with that. There's a $50 difference so that isn't too much.
 
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