Decidedly, for some time now, Robe has been surprising us. Renowned for its extremely reliable fixtures, which have been integrated into the stocks of most lighting vendors, this manufacturer has now fully entered into the world of touring at the highest level with the famous BMFL, acclaimed by leading lighting designers in the “premium” market.
Robe now aims to satisfy the demands of theater, opera and studio applications with the DL7S, with 100% LED fixture based on an 800 W, 7-color source, available in Profile and Wash versions. Declaring outstanding light quality and no compromises, it stands to shut the mouths of even the most demanding of theater people and directors of photography, who cling to their traditional-source references like moss to a rock.
Yes, ladies and gentlemen, unless I am mistaken, it will perhaps be necessary to review your ideas about LED fixtures . . .
We tested the DL7S, a super-complete moving head spot/profile, if you please …
Construction of the unit
The construction of DL7S is a recognizable Robe design – a well-balanced machine with well-built plastic covers, a slightly stocky and pointed head, a large touch screen on its base, nice carrying handles; in short a very classic mover.
The interface panel has XLR5 input/output DMX connectors, XLR3 input/output connectors (for our DJ friends . . . ), an RJ45 port for connecting the unit to ArtNet/MA Net/MA Net2, and a Neutrik PowerCon TRUE1 mains connector, next to the primary fuse.
In terms of size, the DL7S might look like a small BMFL or a big Pointe. . .
It weighs 36 kg, which is about right for such a comprehensive fixture of this caliber. A mechanism allows the pan and tilt to be locked for transportation or for maintenance.
As for rigging and mounting, the DL7S can be installed in any position, on any structural element, totem or truss using a conventional mounting system that employs two omega brackets with quick-release camlocks for mounting the truss clamps. The omega brackets can be installed on either of two perpendicular axes, according to the application.
Not a “mini-menu”
The display on the base is served by a set of four keys for the navigation in the menus of the unit, but the range of possible options is easier to access directly from the touch screen. Here, you can, of course, set the address of the unit, configure the operating modes and select different ventilation options, but there is also temperature control, pan/tilt reversal, various electronic calibrations, etc …
Many parameters are configurable and the user has instant access to the memory of two different configuration settings that can be saved in the unit. The “User A settings” (original, factory settings) and “User B settings” can be recalled directly, which can be very handy if the units go out for different applications but must return regularly to a specific configuration. Just call up a “User B setting” that you have previously programmed and presto!Your configuration will return!
There is a choice of four operating modes, corresponding to 51, 42, 59 or 46 DMX channels. We aren’t particularly happy with most reduced mode still having 42 channels. Although this fixture is more than complete, it is a pity that Robe hasn’t provided a “basic” mode with 20 or 30 channels, allowing access to most functions in a simple way, without this amount of “finesse” that we don’t necessarily need every day. It would save channels (on an installation where there aren’t NOT ONLY some DL7S. . . )
What’s inside ? By The Insider.
Regarding access to the head, the two covers open simply using four 1/4-turn screws on each side, leaving the unit completely open to allow routine maintenance or to work on the modules.
The entire rear of the head is reserved to the “source” section.
The LED engine is completely surrounded by a heat sink with copper heat pipes, through which a cooling gas circulates. These, in turn, are topped with a good-sized fan. It generates its airflow through a system of lenses towards the effect modules.
The internal layout of the head consists of a few easily-removable modules, and can be disassembled by turning two 1/4-turn screws and disconnecting the small connectors (that need to be carefully spotted!).
The first module to receive the light coming from the source – so the furthest back – is the gobo module.
It includes a wheel with six indexable rotating gobos, a wheel with eight fixed gobos (30,8 mm diameter gobos, all glass), and a metal animation wheel perforated with long stripes. The latter can enter and exit the beam on a motorized arm system and comes to life thanks to a second motor, which drives its rotation or its positioning through a belt.
The gobos are mounted on removable “Slot & Lock” system, which facilitates handling when changing gobos and allows the operation of replacing them to be carried out easily outside of the unit.
After these comes the Profile blades module.
This module is very well designed, with a neat and clear construction, and equipped with no less than 10 motors that move the four shutter blades, and that can rotate the whole set at will to any position on the desired axis. You can see perfectly that mechanical intervention on any of the elements should be very simple, with easy access to everything. This isn’t always the case with every fixture when it comes to delicate items like motorized framing modules.
The module that manages the zoom and the focusing system is just beyond the profiling shutters. A classic rail system provides variable zoom of the beam from 7° to 43° and allows for focusing (or not focusing, if you wish).
The 5-facet prism can be inserted at will into the beam and can be freely rotated or precisely indexed.
The frost module is located just behind the output lens.
There is no color module in the head of our DL7S, since everything is managed directly by the LED engine, of course!
The arms of the yoke contain the belt drive system for the tilt of the head, some electronics and the wiring conduits from the base to the head.
As is the practice with most fixtures of the latest generation, thanks to the miniaturization of many components, there are no longer bundles of 50-plus cables that run between the base and the head of the unit, which would always wind up and get damaged under the effects of torsion…
The signals are now multiplexed and distributed directly in the head and the projector arm. The electronics that manage the motors are now near the parameters they control.
The light.
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The beam of light emitted by the DL7S is quite remarkable. Very uniform and particularly well distributed, it is also powerful and punchy.
It is difficult to express the idea of its “visible” power, even if only by comparing it with known equivalents, because the source used here is so different than those that we usually see in a motorized spot/profile. It’s not easy to offer an objective description, even with respect to the color balance, which is obviously not the same as a fixture with a traditional lamp.
Although some very rock’n’roll-oriented fixtures are more “punchy” one can reasonably say that the DL7S is very bright, and its optical qualities are remarkable, with results in terms of brightness probably never seen before on a motorized fixture. It is clearly in the range of luminous performance that you would expect from an excellent 700/1000 W moving head.
There’s nothing to fault in the dimmer or strobe. . . Here, again, as is the case with all LED sources, there are no mechanical constraints to disturb the linearity. The electronic management of the source is exemplary and no irregularities are noticeable with any tint whatsoever.
It is the same for the “shutter” which is also electronic and which allows for monstrous strobes at full power, even at high speed – something not possible with blades that close in front of a beam. . .
The response curve of the dimmer can be configured via the “special functions” channel in linear mode or in “square law” mode, allowing it to correspond with the curves of different types of fixtures. It can also be configured to simulate the dimming of different tungsten sources. No less than five types of tungsten lamps can be emulated, imitating the cooling inertia of the filaments (and perfectly… Totally astounding!). Very cool. If you wanted to play a trick on an old veteran of the theater, making him think you’ve put on his fader a little Source Four or a large 714 SX2, it would work. He would be fooled, I tell you!
CRI of 90 !
The DL7S includes a mode in which it offers a Colour Rendering Index of 90! This value allows the fixture to meet even the most challenging requirements for the world of fashion, television, or any precise subject lighting.
In these fields they don’t just talk about “effects”, “beam” or “gobo shake”, they talk about LIGHT and LIGHTING!
Its greatest quality: the color.
Where DL7S will bury all the others is on its capacity to adapt to the wishes of the most demanding lighting designer, lighting director or director of photography.
It is far from being a unit that simply has some “filters” that allow it to come more or less close a given type of source to try to “emulate” this or that fixture.
Although DL7S offers an “emulation” of tungsten sources (with reproductions of the curves, the inertia of the filament, and all that), we are dealing with a fixture capable of directly creating any kind of light, approximating or not any existing source – probably even going to the most obscure references – and directly offering the perfect light without having to “mimic” anything.
The color mixing of the fixture allows all combinations of possible colors without any mechanical compromise. In any fixture, there are always some blends that are a bit “strange”, with which it is mechanically complicated to achieve a perfect result, it is always some little thing. Here: NO! All colors are absolutely on the money. From the most saturated to the most pastel.
Ambers, all kinds of “pinkish”, pale greens… we tried everything to find a fault. There was no way to find an even somewhat lousy hue.
IT can render ANY KIND of color neatly enough, and in all their little subtleties, with the exception of a true Congo Blue, which is always difficult to achieve with an LED fixture without a specific system of ultraviolet sources.
A color temperature control channel allows you to adjust the color of the source from daylight white down to the emulation of different tungsten sources. Again, it is unprecedented in terms of the quality of emulation… and you can set it to perfection, either by selecting the types of sources according to specific values on the DMX channel, by using a specific linear selection, or by “eye-balling” it to get what you want, or even by tuning the color temperature of the source by placing it side by side with an actual tungsten lamp. I encourage you to try this just to see it, it’s worth it!
Two source modes – Intensity Mode, and CRI mode – can be selected via a DMX channel (and beyond these there are “sub-modes”, which are further choices).
Photometrics.
The Intensity Mode harnesses the maximum power of the LED source, while the CRI method calibrates the source for perfect balance, with a CRI of 90.
Intensity mode – narrow beam.
Intensity mode – wide beam.
Intensity mode – 20° beam.
Maximum CRI Mode – 20° beam.
As you can see in the measurement charts for the 20° beam, there isn’t a great difference in power from one mode to the other. It is actually a tad more “brilliant” in the “Intensity” mode, but this is very slight. This is far from certain features that we have experienced in other fixtures that proposed to obtain very clean beams, but at the price of catastrophic reductions in the overall performance of the light. Here, we have a high-quality and punchy beam with a small additional option that offers a little more “umph”.
A color temperature correction channel allows you to select white balance from 2700 K to 8000 K, with different curves for perfect regulation. Another channel, called “Color Mix Control” permits you to choose from a variety of functional options for the color mixing, with different priorities, a choice of emulations of different color mixing types – additive, subtractive…
We tried everything; there are so many possibilities that it’s bewildering.
In my humble opinion, the operators who will be working with the DL7S would do well to get to know it really well and to create work habits that will be relevant to their needs in the field, otherwise they may go out of their heads…
However, whatever you want to do and whichever way that you like to work, this fixture can do it, and it does not require you to adapt your way of working to its way. Respect.
Still another option will please some lighting designers who work with specific constraints relative to filming or photography: a control channel dedicated to color corrections such as “minus-green” and “plus-green”, linear from 0 to 100%, allows the correction of a dominant or an inadequate green for photo and video.
In any case, as far as color is concerned, this fixture is quite exceptional.
Zoom, iris, focus, Frost
The zoom is fast and can vary the beam divergence from 7° to 43° (on the verge of 44° even… )
The focus is very sharp and allows for very efficient morphing between different effects.
Each gobo wheel and the animation wheel can be focused sharply and independently. So it keeps you from mixing the effects and using them together but, on the other hand, it allows for impeccable fading. The iris control offers various macros, with very nice “pulse” effects that can be very, very fast (nominally, up to 3 Hz).
It has a progressive frost filter that intervenes on the beam in a linear fashion. This is a fairly light frost, like we love in the theater – here 1° – that allows you to blur projections to simulate the effects of natural light, or to back off the impact of the lighting. This is not grandma’s big frost that explodes the beam into a giant fuzzy halo, but it is interchangeable: the unit also ships with an additional 20° frost filter. Also, note that a 10° and a 30° filter are available as options from Robe.
A small detail: the frost may only be applied to beam angles between 20° and 43°. Mechanically, it can not be engaged in a narrower beam, because it it would be in contact with the zoom lens. The electronics of DL7S therefore adjust the zoom angle when inserting the frost, avoiding the collision with the lens system. It’s not a very serious concern, but it’s good to know if you couldn’t understand why the fixture changes the zoom when the frost is activated.
Gobos and prism effects.
The original, included gobos will certainly disappoint people who come from touring, variety and rock’n’roll! Stars, cones and bars of all kinds, but also the textures of foliage, clouds, windows, some breakups… all made to please lighting designers for opera or theater! Yes, because this fixture is made for them! So, if you’re looking to make aerial designs in smoke, there are better fixtures. But for a delicate effect of sunlight through a window onto a hearth, or of textures projected on a cyclorama, it does it perfectly! Aaaahhhh, The Theatre magic!!!!
Rest assured, though, that if you want it to do something else at all costs, or even put the DL7S in a disco, change out the gobos (it’s very simple, as we saw above) and knock yourself out!
The gobos can be supplemented with an animation wheel for projecting stripes that are indexable on any axis, or can be used in continuous movement in any direction.
Any of the effects can also be enhanced with the addition of a 5-facet prism, with indexed positioning or animated in rotation in either direction.
Controlled framing.
The DL7S is equipped with a motorized, 4-shutter framing module, like in a conventional profile fixture. Each shutter features motorized movement on two axes, which allows for orientation and insertion into the beam via two DMX parameters. The whole assembly may also be oriented together through the rotation of the entire module in the axis of the beam. The movement of the shutters is very, very fast and can recall a shutter position memory almost instantly and with pinpoint accuracy.
A “macro” channel allows you to work with the shutters as an effect, and get the most out of their versatility and speed. These macros allow super-fast opening/closing, particularly jittery symmetrical or asymmetrical movements, and many moving-line effects. Paradoxically, for this theater fixture, these are particularly impressive and effective aerial effects. Excellent in every way!
Speaking of movement. . .
The DL7S is a moving head fixture. And it therefore offers motorized pan and tilt, with 8- or 16-bit control (like most of the parameters of this unit) for fine and precise movement. At maximum speed, it offers a sharp and quick movement corresponding to what we expect from large, modern, and versatile high-performance moving heads.
You should note that Robe has equipped the DL7S with its proprietary electronic stabilization system, which reduces oscillations of the beam when the inertia of the head could move the support or truss on which it is mounted…
It must be said that the DL7S is far from being totally silent. And this is normal, given the ventilation system needed to cool its powerful LED engine. But Robe has worked intelligently on this issue, as there are many ways to get around ventilation. Certainly, it is not very noisy, but it could prove to be loud in the silence of a scene that requires no extraneous noise.
First, it is possible to configure the unit directly from the menu in “Theatre” mode, which reduces the maximum ventilation noise emission (almost to zero). In this mode, the electronics regulate the power to the LEDs in order to protect the components. At the cost of a few lumens, it can therefore become an almost totally silent unit, giving the maximum of what it can do with a very reduced ventilation.
As a second solution, it is possible to control the level of ventilation (from minimum up to maximum in 14 steps) via a DMX channel. The electronics of the fixture automatically regulate the power supply of the LEDs depending on the internal temperature to preserve the components, in the same way as with the “Theatre” mode. The difference here is that working like this it is possible to operate the unit to its full capacity, with all its power and all its ventilation, only having to limit it to a little less power when absolute silence is required during the show.
Basically, you can directly control the behavior of the fixture in the cues, not just its light, but also its noise, to adapt it to varying tolerable noise levels during the performance.
It is a sensible compromise, again, this choice of options available to the user, who can work as he wishes to.
So? How did it do?
This fixture is really amazing in many ways. It is probably, to date, the most advanced moving-head spot/profile, in terms of quality and precision of light based on an LED source.
Although we were sometimes bewildered by the extremely rich possibilities and options (too rich sometimes, maybe. . . and without any possibility to dispense with some of the complexity). It is a fixture that is specifically designed for the fields of theater, ballet, opera, broadcast and video, fashion – anywhere that requires light and color quality without compromises, done in detail and with finesse.
“He who can do more can also do less”, so it can still do other things and satisfy most lighting professionals. We found very few flaws, and this fixture has surprised us with the level of demand it can meet purely in terms of “light”, in a time when we are constantly presented with units that are just gigantic compromises and that promise everything but do it with mediocrity, simply to conform to current fads.
The DL7S will allow Robe, once again, to stand out among the few very large professional lighting manufacturers, providing an exceptional product for a field in which its name was not yet very familiar.
Demo of the DL7S Profile by Robe Lighting
More info on the Robe website
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