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The SYSTEM ZERO Follow-Focus XL1 Combo for Canon 7D from iDC Photo Video is a kit whose parts come together and attach to the 7D as one unit and that along with the 7D can mount a tripod as one unit.
The kit is for the 7D because the camera plate of the kit is 7D-specific. And the kit's being an "XL1" combo means that its focusing plate is the XL1 version with seven dovetail slots and a lens brace, as opposed to the shorter "standard" version with four slots and no brace. The main difference between the two types is that the longer one, jointly with a follow-focus wheel assembly, can support longer lens constructions. The focusing plate is also what the main parts of the kit connect to.
One main part is the focus wheel assembly, which slides into one of the seven slots of the focusing plate, and which tightens into place by way of a thumbscrew underneath the plate. The focus wheel itself is equipped with a soft, replaceable but tough O-Ring that presses against a lens and adjusts focus when the wheel is turned. The assembly has no gearbox and no ring gears and so provides convenience in swapping lenses. Just like the assembly is tightened into place on the focusing plate, it can be loosened to allow a lens swap. And the kit is compatible with a very long list of lenses (see specs) because the focus-wheel assembly can adjust along the focusing plate slots to most any lens. And for lenses that fall in-between the slots, the focusing plate slides for quick micro-adjustments.
Another main part of the kit is the accessory mounting bracket, which also slides into the focusing plate and which also tightens by thumbscrew, and to which attach some of the other parts of the kit. A grip handle made of industrial plastic and fastened to a billet-aluminum tall cold shoe is attached with the shoe as one to the top of the accessory bracket and together they provide a handle and a mount for a shotgun mic or for a fill light or for other accessories. The shoe also features a pin registration hole for Speedlites with locking pins. A few inches away from the handle is attached another cold shoe. And on the side of the bracket is attached a quick-release clamp that at the push of a knob accepts or releases any dovetailed adapter plate that conforms to Arca-Swiss dimensions. And additionally, the accessory bracket itself has many mounting holes along it for the accessory mounts to be repositioned throughout and for additional ones, such as iDC's mini-tilter, to be attached.
With the accessory bracket and the wheel assembly joined to the focusing plate, onto the top of the plate also fastens a 7D-specific camera plate; and the camera plate is what attaches to the 7D, thus attaching our whole kit with it to the camera. And to the bottom of the focusing plate fastens a spacer, via which our kit can be mounted onto a tripod or monopod quick-release plate, and which provides one inch of space between the focusing and quick-release plates thus affording easy access to the red thumbscrews underneath the focusing plate. The spacer also allows the kit to fluidly be moved along a quick-release plate to be positioned in a way that best distributes the weight of both the kit and of an accompanying lens.
And lastly, the 7D-specific camera plate can also serve useful in adding viewfinders to the 7D. The plate holds in place via two quick-release thumbscrews compatible SYSTEM ZERO viewfinders, such as the iDC-modified Hoodman HoodLoupe.
Eight components attach to a 7D as a single unit.
A 7D-specific camera plate makes this kit 7D-compatible.
The follow-focus assembly has no gearbox and no ring gears.
A seven-slot focusing plate serves as the kit's quick-release base.
A spacer mounts the whole kit to an optional tripod quick-release plate.
The accessory bracket takes on shotgun mics, lights and other accessories.
An iDC-modified quick-release viewfinder can be attached on via thumbscrews.
Slides and joins into any of the seven focusing plate slots.
The focus wheel is equipped with an O-Ring for adjusting focus.
A gearless design lets lenses conveniently and quickly be swapped.
The seven-slot focusing plate affords broad lens compatibility (see specs).
Accessory Mounting Bracket
Features a grip handle, two shoes, and a quick-release clamp attached.
The shoes each have one pin registration hole for Speedlites with locking pins.
The clamp accepts dovetailed adapter plates that conform to Arca-Swiss dimensions.
The bracket itself has many holes for shifting around and adding more accessory mounts.
In the Box
iDC Photo Video SYSTEM ZERO Follow-Focus XL1 Combo for Canon 7D
Canon Prime Lenses:
EF 14mm f/2.8L USM (Series I & II) (APS-C sized sensor cameras only)
EF 20mm f/2.8 USM
EF 24mm f/1.4L USM (Series I & II)
EF 28mm f/1.8 USM
EF 35mm f/1.4 USM
EF 35mm f/2
EF 50mm f/1.2L USM
EF 50mm f/1.4 USM
EF 50mm f/1.8 II
EF 60mm f/2.8 Macro USM
EF 85mm f/1.8 USM
EF 85mm f/1.2L USM (Series I & II)
EF 100mm f/2 USM
EF 100mm f/2.8 Macro
EF 100mm f/2.8L Macro IS USM
EF 135mm f/2L USM
EF 180mm f/3.5L Macro USM
EF 200mm f/2.8L USM
EF-S 60mm f/2.8 Macro USM (APS-C sized sensor cameras only)
Canon Zoom Lenses:
EF 10-22mm f3.5-4.5 USM (APS-C sized sensor cameras only)
EF 16-35mm f/2.8L USM (Series I & II)
EF 17-35mm f/2.8L USM
EF 17-40mm f/4L USM
EF 24-70mm f/2.8L USM
EF 28-70mm f/2.8L USM
EF 24-105mm f/4L IS USM
EF 28-135mm f/3.5-5.6 IS USM
EF 70-200mm f/2.8L IS II USM
EF 70-200mm f/2.8L IS USM
EF 70-200mm f/2.8L USM
EF 70-200mm f/4L IS USM
EF 70-200mm f/4L USM
EF 70-300mm f/4.5-5.6 DO IS USM
EF 70-300mm f/4-5.6 IS USM
EF 70-300mm f/4-5.6L IS USM
EF 300mm f/4L IS USM
EF-S 10-22mm f/3.5-4.5 USM (APS-C sized sensor cameras only)
EF-S 15-85mm f/3.5-5.6 IS USM (APS-C sized sensor cameras only)
EF-S 17-55mm f/2.8 IS USM (APS-C sized sensor cameras only)
EF-S 17-85mm f/4-5.6 IS USM (APS-C sized sensor cameras only)
EF-S 18-135mm f/3.5-5.6 IS (APS-C sized sensor cameras only)
EF-S 18-200mm f/3.5-5.6 IS (APS-C sized sensor cameras only)
Sigma Prime Lenses:
10mm F2.8 EX DC Fisheye HSM (APS-C sized sensor cameras only)
20mm F1.8 EX DG Aspherical RF
24mm F1.8 EX DG Aspherical Macro
28mm F1.8 EX DG Aspherical Macro
30mm F1.4 EX DC (APS-C sized sensor cameras only)
30mm F1.4 EX DC HSM (APS-C sized sensor cameras only)
50mm F1.4 EX DG HSM
Macro 50mm F2.8 EX DG
Macro 70mm F2.8 EX DG
85mm F1.4 EX DG HSM
Macro 105mm F2.8 EX DG
APO Macro 150mm F2.8 EX DG HSM
APO Macro 180mm F3.5 EX DG
APO Macro 180mm F3.5 EX DG HSM
Sigma Zoom Lenses:
10-20mm F3.5 EX DC HSM (APS-C sized sensor cameras only)
10-20mm F4-5.6 EX DC (APS-C sized sensor cameras only)
10-20mm F4-5.6 EX DC HSM (APS-C sized sensor cameras only)
12-24mm F4.5-5.6 EX DG Aspherical
12-24mm F4.5-5.6 EX DG Aspherical HSM
17-50mm F2.8 EX DC OS HSM (APS-C sized sensor cameras only)
17-70mm F2.8-4 DC OS HSM (APS-C sized sensor cameras only)
17-70mm F2.8-4 DC Macro OS HSM (APS-C sized sensor cameras only)
24-70mm F2.8 IF EX DG HSM
24-70mm F2.8 EX DG Macro
18-50mm F2.8 EX DC Macro (APS-C sized sensor cameras only)
18-50mm F2.8 EX DC Macro HSM (APS-C sized sensor cameras only)
28-300mm F3.5-6.3 DG Macro
APO 50-500mm F4.5-6.3 DG OS HSM
APO 70-200mm F2.8 EX DG OS HSM
APO 70-200mm F2.8 II EX DG Macro HSM
18-50mm F2.8-4.5 DC OS HSM (APS-C sized sensor cameras only)
18-125mm F3.8-5.6 DC HSM (APS-C sized sensor cameras only)
70-300mm F4-5.6 DG OS
APO 70-300mm F4-5.6 DG Macro
70-300mm F4-5.6 DG Macro
18-125mm F3.8-5.6 DC OS HSM (APS-C sized sensor cameras only)
18-200mm F3.5-6.3 DC (APS-C sized sensor cameras only)
18-200mm F3.5-6.3 DC OS (APS-C sized sensor cameras only)
18-200mm F3.5-6.3 DC OS HSM (APS-C sized sensor cameras only)
18-250mm F3.5-6.3 DC OS HSM (APS-C sized sensor cameras only)
APO 50-150mm F2.8 II EX DC HSM
APO 120-400mm F4.5-5.6 DG HSM
APO 120-400mm F4.5-5.6 DG OS HSM
APO 150-500mm F5-6.3 DG HSM
APO 150-500mm F5-6.3 DG OS HSM
50-200mm F4-5.6 DC OS HSM (APS-C sized sensor cameras only)
Tamron All-in-One Zoom Lenses:
AF18-200mm F/3.5-6.3 XR Di II (APS-C sized sensor cameras only)
18-270mm F/3.5-6.3 Di II VC PZD (APS-C sized sensor cameras only)
AF18-270mm F/3.5-6.3 Di II VC (APS-C sized sensor cameras only)
AF28-200mm F/3.8-5.6 XR Di
AF28-300mm F/3.5-6.3 XR Di VC
AF28-300mm F/3.5-6.3 XR Di
Tamron Ultra-Wide-Angle Zoom Lens:
SP AF10-24mm F/3.5-4.5 Di II (APS-C sized sensor cameras only)
Tamron High-Speed Zoom Lenses:
SP AF17-50mm F/2.8 XR Di II VC (APS-C sized sensor cameras only)
SP AF28-75mm F/2.8 XR Di
SP AF70-200mm F/2.8 Di
Tamron Telephoto Zoom Lenses:
SP70-300mm F/4-5.6 Di VC USD
SP AF200-500mm F/5-6.3 Di
AF70-300mm F/4-5.6 Di
Tamron Macro Lenses:
SP AF60mm F/2 Di II (APS-C sized sensor cameras only)
SP AF90mm F/2.8 Di
SP AF180mm F/3.5 Di
Tokina 11-16mm f/2.8
Zeiss Distagon T* 21mm f/2.8 ZE
Zeiss Distagon T* 28mm f/2 ZE
Zeiss Planar T* 50mm f/1.4 ZE
Zeiss Planar T* 85mm f/1.4 ZE
Nikkor 24mm f/2.8 (with adapter for EOS mount)
Nikkor 28mm f/2.8 (with adapter for EOS mount)
Nikkor 35mm f/2 (with adapter for EOS mount)
Nikkor 50mm f/1.4 (with adapter for EOS mount)
Nikkor 85mm f/2 (with adapter for EOS mount)
Nikkor 105mm f/2.5 (with adapter for EOS mount)
Nikkor 135mm f/2.8 (with adapter for EOS mount)
Super telephoto lenses are presently not supported due to the large diameters of the lens barrels.