Alphatron 4 x 4 Clip-On Matte Box (114mm)

BH #ALPMBCO4X4 • MFR #ALP-MB-CO-4X4
Alphatron
Alphatron 4 x 4 Clip-On Matte Box (114mm)
Key Features
  • Fits Lenses up to 114mm Front
  • 1 x Rotating 4 x 4 Filter Stage
  • 1 x Fixed 4 x 4 Filter Stage
  • Includes Removable Top Flag
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The Alphatron Broadcast Electronics 4 x 4 Clip-On Matte Box allows you to use 4 x 4 filters when shooting with lenses that feature a front outer lens barrel diameter of 114mm without requiring the use of support rods. This allows you to shoot using available 4 x 4 filters without the extra weight of a rod mounted matte box system. The matte box features two filter stages, one that is fixed and one that is fully rotatable. The matte box features small thumbscrews that lock the filter tray into the stage, useful for setting the vertical position for grad filters.
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Alphatron ALP-MB Overview

The Alphatron Broadcast Electronics 4 x 4 Clip-On Matte Box allows you to use 4 x 4 filters when shooting with lenses that feature a front outer lens barrel diameter of 114mm without requiring the use of support rods. This allows you to shoot using available 4 x 4 filters without the extra weight of a rod mounted matte box system. The matte box features two filter stages, one that is fixed and one that is fully rotatable. The matte box features small thumbscrews that lock the filter tray into the stage, useful for setting the vertical position for grad filters.

The matte box includes a removable eyebrow (top flag) that attaches to a lockable hinge, which allows you to set the position of the flag and lock it in place. It also incorporates adjustable internal top and bottom flags, which can be used to block protect the lens from flares. A side flag kit is available to provide additional flare protection and available step down adapter rings allow you to use this matte box with select lenses that are smaller than 114mm.

2 x filter stages with filter locks for setting filter height. 1 x rotating filter stage allows you to adjust the filter, which is useful when working with graduated or polarizing filters.
The built-in eyebrows are adjustable, allowing you to control glare, flare, and reflections without using external flags, keeping the matte box small and compact.
The included removable top flag attaches to the top of the matte box via the lockable hinge that allows you to precisely set the position of the flag and lock it so that it does not move during the shot.
Please note that clip-on matte boxes work best with lenses that feature an internal focus mechanism, so that the front of the lens does not rotate as the lens is focused. Most modern prime and zoom lenses feature this construction.

Alphatron ALP-MB Specs

Attachment MethodLens Clamp
Filter Stages1 x Rotating Stage (4 x 4")
1 x Fixed Stage (4 x 4")
Lens Compatibility114 mm Clamp
Flags1 x Top Flag
Packaging Info
Package Weight1.8 lb
Box Dimensions (LxWxH)16.1 x 9.3 x 5.4"
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YOUR RECENTLY VIEWED ITEMS

question

What material is the front hood made from?
Asked by: Corie
The front hood material is ABS plastic.
Answered by: Dennis A L.
Date published: 2018-08-25

question

What is the real weight of this matte box? ive seen'it listed as .7kg but it looks identical in every way to the Vocas MB-255 which is 350g
Asked by: Corie
We would approximate the weight as being 1.75 lbs.
Answered by: Dennis A L.
Date published: 2018-08-25

question

This mattebox looks almost identical to the Vocas MB-255 appart from the colour and branded badges. Are they the same? The Vocas says it weighs 350g where the Alphatron is 750g. is this correct?
Asked by: Corie
Without direct observation we cannot confirm they are identical but it does seem they are. The weight we have for both are in Imperial and are virtually the same.
Answered by: Dennis A L.
Date published: 2018-08-25

question

What's the actual weight of the mattebox without the flag?
Asked by: Camila F.
Alphatron lists the matte box as weighing 1.65lbs/0.75kg. No mention is made of the top shade.
Answered by: Dennis A L.
Date published: 2018-08-25

question

Will this work with a full frame Sony A7Sii and sony 28-135mm lens?
Asked by: Camila F.
We are of the opinion that this should work fine for the A7S II and the 28-135mm lens. it may work down to 24mm as weil without vignetting.
Answered by: Dennis A L.
Date published: 2018-08-25

question

Will the back diameter fit my Canon Cinema Primes?
Asked by: Anonymous
The industry standard for the rear of matte boxes and the front of cinema lenses is 114mm. Unfortunately, not all manufacturers adhere to this. However, in this case the matte box rear and the lens front are both the 114mm standard. So yes, this matte box will work with Canon Cinema Primes.
Answered by: Dennis A L.
Date published: 2018-08-25
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