Tag Archives: Aputure DEC

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Aputure has released several versions of their DEC Lens Adapters, but in case you're not familiar with what they are and how they work, i've put together this Product Overview video. This video specifically focuses on the brand new DEC Vari-ND Model (available in MFT and E-Mount), but is very similar to the other models - especially the LensRegain version which is a Focal Reducer (a.k.a Speed Booster) Lens adapter.


Who's it For?
The way the product DEC Lens Adapters are designed, I think primarily it should really appeal to camera operators that need the ability to adjust focus with a wireless remote. Obviously it's not at the level of a professional Wireless Follow Focus system, but it at least offers decent focus controls at a minimal cost in an incredibly compact form. Even cheap wireless follow focus systems can still run well over $1200 dollars and require additional rods to mount, and additional power to run the focus motors.

The wireless remote and clamp can be attached as a handle to your gimbal, on a Steadicam, end of a Jib, or even to just the Pan Handle of your Tripod. Additional features such as iris adjustment on your Canon EF (or compatible) lenses can be handy when you are transitioning a camera movement from indoors to outdoors, or to just change your DOF. But now with the new Vari-ND version (electronic variable ND Filter) you have another dimension in which you can control your exposure and all through a wireless remote.

About the Vari-ND Filter
Traditional Variable ND Filters placed on the front lenses use two rotating pieces of glass that cancel out light as you rotate. While this is simple and effective, there are some drawbacks to how much variation you can have, how much color shift happens, and most importantly how much softness occurs because of how the two additional pieces of glass affect the incoming light (image).

The ND Filter inside of the DEC Vari-ND Lens Adapter is NOT using two pieces of polarizing glass. and is instead using a single sheet of glass (with liquid crystals) and uses electricity to adjust and vary the amount of ND. This is similar to the technology found in the new Sony FS5 camera. Aputure also claims that there are no color shifts happening during the process of varying the amount of ND applied.

At the minimum ND8 you're looking at about 3 Stops of ND Applied. The darkest ND applied on the Vari-ND is about 11 stops. ND8 (3 Stops) is pretty dark and something you won't be using indoors. Outdoors, you'll find the the Vari-ND useful especially when shooting at F/2.8 or wider. You'll notice in my video test there are steps between what i'm actually calling out (stops between ND8 and ND16, etc). Aputure claims they may be able to add a firmware update that allows smooth ND transitions instead of the stepping it has now (similar to how the Sony FS5 operates).

Summary
The line of Aputure DEC Lens Adapters are certainly very unique and offers features in a form factor and price that can't be found in any other tool. You can visit their website for additional information about the complete line of Aputure DEC Lens Adapters (found here).

aputure dec vari-nd lens adapter lensregain
check latest pricing Aputure DEC - Lens Adapter + Vari-ND + Lens Regain

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So yesterday I spent a little time testing the Aputure DEC Remote Wireless Follow Focus Canon EF Lens Adapter. Keep in mind that all of the units that other reviewers have (including mine) are just prototypes. So everything that you see could change when they go to final production.

As mentioned in my earlier article, the prototypes available today can attach a Canon EF (autofocus) Lens to a Sony E-Mount or Micro Four Thirds (MFT) Camera and allow you to change aperture values and remotely change focus via a wireless remote. Here's a little video showing the Sony E-Mount DEC Adapter in use.

Since the Aputure DEC Lens Adapter relies on the internal motors of the lens being used, each lens may provide a slightly different experience. Some lenses may offer a smoother transition, while others may have a more prominent stepping motion moving from one focus point to the next. During slower focus movements some lenses will have a louder 'stepping' type noise, while other lenses may be a bit more silent. This is all based on the lens, and at this time not a lot of testing has been done.

In the 'current user manual' it lists several Canon EF L Series lenses, but I decided to try a few different ones such as the Sigma, the Canon 40mm STM, and a 50mm F/1.8. All of the lenses worked flawlessly to adjust iris and I could control focus. I was a bit worried the system would be buggy using random lenses, but so far it's taken everything i've thrown at it.

canon stm 40mm lens follow focus aputure dec
Canon 40mm STM Lens Aputure DEC
Canon 40mm STM Pancake Aputure DEC Wireless Follow Focus Lens Adapter

So while this is still a prototype, so far I think the Aputure DEC is an awesome product for anyone who needs to adjust focus on an adapted Canon EF Lens in situations where you can't normally reach the focus ring. For example when mounted on a Jib/Crane, Steadicam, or even a Gimbal.

Typically on any of my stabilizers i'm settled in with a very wide lens with the aperture stopped down and everything in focus. With the Aputure DEC I would be able to use a Gimbal with a Shallow DOF and focus from an object in the foreground to possibly a distant subject in the background. The focus changes can be quick, or they can be slow.

Will this replace all Follow Focus systems? Obviously not as it only works with Canon EF (autofocus) Lenses, and not manual focus Cine Lenses. The DEC (prototype) also uses a stepping motion which dependent upon the lens may or may not be smooth. There are still a few things that I think still need to be refined and changed on the DEC prototypes, which i'll be sharing with the Aputure company. One suggestion is having a more traditional wireless follow focus remote as the current one could be tricky tracking a subject back and forth if they move quickly.

Sony A7s Shogun 4K Aputure DEC Wireless Follow Focus
Sony a7s Aputure DEC Sigma 18-35mm Atomos Shogun

Once a product like this becomes available on the market, I really think this will really impact how many consider changing focus remotely on Canon EF lenses today. It certainly opens up 'options' in the industry that were never available before. Maybe not so much Hollywood, but consider the large market of event, wedding, news, or other video shooters that don't need the precision of a high end WFF system and are shooting with Sony E-Mount and MFT cameras. Compared to other Wireless Follow Focus systems, the Aputure DEC is incredibly simple to use while offering the smallest and lightest possible footprint.

Aputure DEC Lens Adapter Canon EF Wireless Follow Focus Cheesycam
NAB2014 Aputure Announced DEC Lens Adapter Remote Follow Focus

I'm going to continue testing these DEC adapters and hopefully more focusing examples. The next one i'll set up is the MFT Mount which can Start/Stop video on cameras with a LANC connection. If you have any questions so far, leave them in the comments.

Aputure DEC Lens Adapter wireless follow focus
find-price-button Aputure DEC Lens Adapter + Wireless Follow Focus - Available NOW

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Last year NAB 2014 Aputure showed off an entirely new and innovative Wireless Remote Follow Focus system. It looks like a basic lens adapter to add a Canon EF (autofocus lens) to a Micro Four Thirds or Sony E-Mount camera, but this lens adapter has enough communication with the EF Lens that it can drive it's focus motors, change aperture, and also send back the focal distance to the wireless remote.


NAB 2014 Video

The Aputure DEC Remote can also Start / Stop video on certain cameras, and A/B focus points can be set to rack from one focus point to another. If you're familiar with traditional Wireless Follow Focus systems it typically requires a set of 15mm Rods, a Focus Motor, Lens Gears, Battery Pack, and Wireless Receiver. The Aputure DEC eliminates all of that extra gear into just a simple lens adapter which makes it perfect for small camera systems on small stabilizers (steadicams) and Gimbal Stabilizers.

It's been a year since it's been introduced, and what I thought was a lost idea is actually becoming reality. The product is still not available to purchase, but right now I have in possession a couple of prototypes to test out. I'm super excited about this, comments?

A photo posted by Emm (@mrcheesycam) on

Aputure DEC Lens Adapter wireless follow focus
find-price-button Aputure DEC Lens Adapter + Wireless Follow Focus - Available NOW

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