Monthly Archives: December 2013


A short while back I shared a simple way of wiring up a motorized slider to move back and forth continuously (original article found here). No fancy software or programming, just a basic electro-mechanical system. There are many benefits to having this 'auto-looping' feature. One benefit is that a 'B' camera can continuously slide back and forth without the need for an additional operator, and another benefit is for TimeLapse projects that can continue to capture footage without stopping at the end of a rail.

Throw a few of these around an event and you'll have some great Dynamic Camera Movement footage to cut to without hiring additional crew.

I decided to update the project because some people couldn't quite figure out the circuit. With these new instructions using a numbered socket block, anyone should be able to follow this build, even without understanding the circuit. Hopefully this clears things up for some of you out there, and for those who may have been initially intimidated by the wiring.

Looping-circuit-auto-reverse-polarity_01 copy
Color coded wiring diagram - Click for larger view

I would set this up in a test scenario (loose parts on a table), and once you have it figured out, you can start attaching things to your actual motorized slider. Remember that this is all based on a very specific DPDT Relay + Socket Base Kit (found here).

Step by step Check List for you to follow on building an 'Auto Reverse Polarity Circuit'.
#1 Wire connects to 'NC' on Switch A
#2 Wire connects to one side of the Motor
#2 Wire (also) LOOPS back to Terminal #3
#3 Wire LOOPS back to Terminal #2
#4 Wire LOOPS back to Terminal #7
#5 Wire connects to 'NC' of Switch B
#5 Wire (also) connects to NEGATIVE on Battery
#6 Wire connects to POSITIVE on Battery
#6 Wire (also) connects to 'NO' on Switch A
#7 Wire LOOPS back to Terminal #4
#7 Wire connects to 'C' on Switch A
#7 Wire connects to one side of the Motor
#8 Wire connects to 'C' on Switch B

Remember to start this build by having parts loose on a table. You should know exactly what side your switches should be (left/right) so that the Slider is bouncing back and forth properly. If it's still not working correctly, try swapping the wires on your motor. If you have it swapped it will turn in the opposite direction. This circuit is designed specifically for the motor to turn a certain way.

Hopefully this has been helpful for those struggling with this project...

How It Works:
Two 3 Pin NO+NC Momentary Micro Switches (as found here) at each end reverse the polarity of the motor each time they are triggered.

DIY Slider micro switch 3 pin NO NC
Example of 3 pin NC/NO Momentary Micro Switch

A 12V DPDT Relay (as found here) is either 'Always ON' until the slider reaches the opposite switch which drops power to the relay.

12V DPDT Relay DIY Slider Motion Control
12V DPDT Relay with Socket Base

In one direction, the relay is technically 'STUCK ON' by way of a tricky little feedback loop in the circuit. To turn the entire slider on or off, i'm just using the switch from the battery. In this example, i'm not using a speed controller, but one can easily be added.

Additional Parts Suggested for this Build.

5.5 2.5 DC Male Plug Tip
DC Tip 2.5 5.5
12V Super battery



Here's something fun I was playing with earlier, which could be of interest to those who travel with small cameras but want a little more out of them. In this setup, i'm adding a Raynox Ultra Macro Adapter to the RX100 Mark II. Since this version has a hot shoe, why not throw on a Macro LED light? Here's the results from my setup.

This is the closest the Sony RX100 Mark II can focus on a US Quarter.

Here's how close I can focus with the Raynox Macro Adapter.

Now i've tried a variety of other Macro filters (diopters), and various techniques, these Raynox Adapters I feel have the best quality smallest, and simplest setup. FYI, In order to use this Raynox adapter it needs to attach to a 'zoom' lens with a threaded filter. You need to zoom into the adapter to get the macro effect.

RX100 Filter Holder Adapter Macro Raynox
find-price-button Raynox Super Macro Lens Adapter

The Sony RX100 does not offer a threaded filter, so to mount the Raynox you would need to grab the PNC MagFilter. The MagFilter can be used on virtually any point-n-shoot camera that lacks filter threads. A very thin metal ring adheres to the camera's lens and a special Magnetic Filter Holder quickly snaps in place. The design keeps your compact camera 'compact' as it should be. Not only handy for this Macro adapter, but to also add CPL, ND, or other creative filters.

find-price-button PNCGear MagFilter System 52mm, 5mm, 58mm Threaded Adapter

The camera is literally on top of the quarter so it blocks light, plus it's a good idea to stop down your aperture in macro mode. Adding an LED Macro light helps shed light on the subject. It's a bit spotty, but i'm using this super cheap flexible LED Macro light (found here).

LED Macro Light Flexible
find-price-button Flexible Shoe Mount LED Macro Light



End of the year, hundreds of items on sale, but here's three great deals worth mentioning.

Canon 5D Mark III Body
The Canon 5D Mark III is available via Adorama for just $2699
Regular Price $3408.95 Sale Price $2699.00 Price at Checkout + Free Shipping and 2% Adorama Rewards (found here)

The Canon 70-20mm F/2.8L IS II Lens drops down to just $1699!
Regular Price $2499.00 Sale Price $1799 after MIR Price at checkout + Free Shipping and 2% Adorama Rewards (found here)

Canon 24-70mm F/2.8L II USM
Canon EF 24-70mm f/2.8L II (newest version) USM Zoom Lens - Just $1699
Regular Price $2299.00 Sale Price $1699 after MIR Price at Checkout + Free Shipping and 2% Adorama Rewards (found here)



Rumors stated the new Mac Pro would have been released this past Monday, but actually the official release was this morning. Pricing starts at $2999 for the basic model, but like the MacBook Pro there's not much room for upgrades after the purchase. So to purchase the best right out of the gate, you're sitting close to $9600.

Apple Mac Pro Desktop 4K monitorApple 4K Mac Pro

The basic $2999 model comes with a 3.7 GHz Xeon E5 quad-core processor, 12GB RAM, 256GB PCI-e based flash storage, and a Dual FirePro D300 Graphics card.

For about $9600 dollars, the best you can upgrade to is a 2.7 GHz Xeon E5 12-core processor, 64GB RAM, 1TB PCI-e based flash storage, and a Dual FirePro D700 Graphics card.

Apple 3 4K Monitors 12 Core Mac Pro

Keep in mind, this is a desktop that will still require a display. You can opt in for a single Thunderbolt display tacking on another $1K, but this beast was really designed for 4K output. Apple offers to throw in a Sharp 32" 4K monitor for an added $3600 dollars. Congratulations, you're now sitting at $13,200 for a 4K desktop system they say will last you for the next 10 years [with enough horsepower to add another two 4K monitors]

So has anyone already committed to getting the new Mac Pro? Check out for more info on the new Mac Pro Desktop (click here)



Ok, so my first example of a Lens Turbo on a Panasonic GH3 definitely showed an increase in Field of View. The first tests were purposely setup to show an increase in Exposure, and may have had some lens flare on the overexposed image.

Here's a simple test in a controlled environment shot with a Rokinon 85mm T/1.5 Cine Lens @T/5.6. One is shot with the basic FotoDiox adapter and the other is with the Lens Turbo adapter. I pushed in to attempt to simulate the same framing and keep the chart up to the corners. This adapter does go soft towards the corners, but you decide if it's usable for your needs.

Without Lens Turbo copy
With FotoDiox Adapter - no Focal Reducer (click for larger view)

With Lens Turbo copy
With Mitakon Lens Turbo Nikon to M43 Adapter (click for larger view)

For more info, you can find the Lens Turbo MFT Focal Reducer adapter available now via eBay (click here).

find-price-button Lens Turbo Focal Reducer Nikon to MFT Micro Four Thirds Adapter



BlackMagic 4K Cinematic Camera Cinema Production

Want some 4K footage from the (not yet released) BlackMagic Design Production 4K Camera? There's information about the camera's status, but they've uploaded almost 10GB of footage for you to download and color grade. Head on over to this link where Grant Petty has an update:

BlackMagic 4K Footage


1 Comment

Holiday Promotions!

Into The Atmosphere from Michael Shainblum on Vimeo.

Dynamic Perception has put together a few new bundles based on popular demand. Economical Stage Zero ready-to-run package with installed quick change plate and swappable motor at a discount.


Customers can Save $130 with coupon code "Sub Zero" on the Stage Zero 6-Foot Bundle w/Quick Change Motor System (installed)


Also packaged together is a super time-lapse and real-time video bundle. This is the cat's meow, the all inclusive professional moco bundle ready to launch you into the world of time-lapse and video motorized motion. It's the uber package at a substantial savings!

2. The uber Bundle: The biggest and most bad ass package for the Stage Zero:

 1 Comment


Here's a side by side video test showing samples from a Panasonic GH3 with and without the new Lens Turbo Focal Reducer. We used a newer Rokinon 85mm T/1.5 Cine Lens [Nikon Mount] + and old Nikon 50mm Pancake. With the Lens Turbo adapter we were able to achieve a wider field of view and an increase in exposure.

Obviously YouTube has added compression to the video, but if you want to be a pixel peeper, you can download a better version of this edited video from my Vimeo Channel (here).

I think the image quality achieved from this (Speedbooster alternative) adapter delivered decent results for the price. The Metabones Speedbooster will run about $489 dollars (here), versus this Lens Turbo which can now be found under $139 US (here).

Of course we're just using a consumer grade Rokinon Cine Lens, and an old $50 dollar lens from eBay. There's no doubt this adapter won't match up to the quality of the Metabones products. Anyone using serious glass worth thousands of dollars might as well pony up the extra cash for the Metabones MFT M43 Speedbooster (found here).

Metabones Speed Booster MFT M43 Nikon Adapter
find-price-button Metabones SpeedBooster Nikon to M43 MFT

If you're a casual video shooter looking to get a wider field of view and increased light through your common glass, I think you'll be happy with the Lens Turbo. I'll probably go out and take a bunch of high resolution still images on the next outing, but for now let's hear a few comments about these first video test results. What did you guys think so far? [Comment]

For more info, you can find the Lens Turbo MFT Focal Reducer adapter available now via eBay (click here).

find-price-button Lens Turbo Focal Reducer Nikon to MFT Micro Four Thirds Adapter