Creating a Wi-Fi Access Point on OS X

With Kuuvik Capture 2.2 around the corner, I’m going to post a few short tutorials on wireless “tethering” setups. Yes, the wireless connection option will make a return in version 2.2!

So let’s start with a solution to one of the most aching issues.

Imagine the following situation: you are out in the field, photographing an old castle. You want to place the camera on a crane to photograph from a high vantage point. The crane is higher than your longest USB cable can reach, so wireless connection would be the most appropriate solution.

First obstacle: all Canon Wireless File Transmitters (both built-in ones and external bricks) require an existing network to connect to in EOS Utility mode. Yes, it’s utterly stupid, since in other modes they can operate as an access point and create their own network. But other modes simply suck in terms of remote control features.

Back to our example: there’s no phone coverage (for the Personal Hotspot trick), there are no nearby networks of any kind to connect to. You could create an ad-hoc wireless network on your Mac, but setup is complicated and error prone (needs manual TCP/IP configuration on both the computer an on the camera), and in the last few versions of OS X there’s no way to create a secure Wi-Fi network (another utter stupidity). The lack of security is a total showstopper, so this isn’t the appropriate way to make the connection work.

There’s a neat trick, however. OS X has a built-in Internet Sharing feature that practically creates a Wi-Fi access point to share an existing network connection. The next obstacle is that you need the network you want to share to be in the “connected” state (think cable plugged in both to the computer and into a router). Unfortunately the built-in loopback interface (which is always connected and provides access to the local computer only) is not accessible from the Network preference pane in System Preferences (one more stupidity).

The key to the trick is to make the loopback interface appear in the Network pane. Actually, it’s pretty straightforward: launch the Terminal app and copy & paste the following two commands (working on both Yosemite and El Capitan):

sudo networksetup -createnetworkservice Loopback lo0
sudo networksetup -setmanual Loopback 172.20.42.42 255.255.255.255

Enter your password to allow these modifications if OS X asks for it.

Now your Network preference pane should list the brand new Loopback service:

network-loopback

It’s still listed as “not connected”, but don’t worry, that’s just a bug.

Side note: if you use multiple “network locations”, you need to repeat the above commands for each location. If you just use the Automatic location, then you can move to the next step.

Go to the Sharing preference pane, and on the list of services click Internet Sharing. If the service is already on, turn it off. Choose the Loopback service as the one you want to share your connection from. And share to computers using Wi-Fi.

sharing-1

You can set up the shared Wi-Fi network (the network we’ll connect the camera to) by clicking the Wi-Fi Options button. Here is the Wi-Fi Options screen:

sharing-2

The network name is your computer’s name by default, but I’d recommend to enter a simple alphanumeric name (containing no special characters), as Canon cameras have issues with displaying characters outside of the simple letters and numbers range.

All other options are the usual Wi-Fi setup options. A few notes though. Channels 1-11 use the 2.4 GHz band, while 36-48 use the 5 GHz band. Transmitters in the 70D and 6D only operate on the 2.4 GHz band, while the external WFT-E7 brick operates on both. The 5 GHz band is faster and generally has less interference from other networks and appliances operating in the crowded 2.4 GHz band. For security, choose WPA2 Personal (the other option is None, which is unacceptable).

Once the Wi-Fi options are entered, you can start the sharing service. To do it, click the check box in front of its name in the list. OS X may ask to turn on your Wi-Fi radio if it was off, and will ask your confirmation to start the sharing service. After the service has been successfully started you’ll see a screen similar to the one below:

sharing-3

IMPORTANT: due to an OS X bug, your selection in the share from list may change to another (random) network service. So you must check whether it still shows the Loopback service after each start!

The Wi-Fi icon on the menu bar will change to the sharing icon once the sharing service is ready to accept connections.

sharing-on

And that’s it! Your personal access point is now ready. The steps to configure your camera will be discusses in an upcoming post.

  ☕ ☕ ☕

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Kuuvik Capture 2.1 Released

Version 2.1 of Kuuvik Capture is now available on the Mac App Store. This update brings a handful of new features and a few fixes. Let’s start with the new features.

kc21prefsFirst, a new preference is added to control whether the camera’s LCD is turned on when you start live view from within Kuuvik Capture.

If you turn this preference off, the camera’s LCD will remain turned off to conserve battery. But you can turn the LCD on any time with the live view button on the camera.

When you start live view directly on the camera, it’s LCD will turn on regardless of this preference (chances are that you engaged live view on the camera because you want to look at the LCD).

Upon user request, the number of focus bracketing steps had been increased from 30 to 100. And I’ve added hot keys to the Purge Unrated (Cmd-P) and Purge Unrated and Decrease Rating (Shift-Cmd-P) culling commands.

The bug fixes are the following:

  • Live view is now automatically stopped when changing lenses or when the camera is disconnected.
  • Live view navigator zoom labels now display “6x” and “16x” for the EOS 5DS and 5DS R. The navigator frame’s size is also corrected to reflect these zoom levels.
  • ISO 16000 now can be set from Kuuvik Capture on the EOS 7D Mark II, even if using full stop ISOs is set on the camera. This is in line with the camera’s behavior.

Version 2.1 is a free update for existing Kuuvik Capture 2 owners.

Kuuvik Capture 2 Available on the Mac App Store

kc2icon@2xI’m proud to announce that Kuuvik Capture 2 is now available on the Mac App Store!

I’ve added a few features since the Beta 2 (see my previous post about the Beta 2 feature list):

  • Open in Application command to directly open the CR2 files in your favorite RAW converter.
  • Ratings in the CR2 files (set in the camera) are now honored.
  • Added clipping display control menu items to the image area’s context menu.
  • Added ability to work with Canon EOS 5DS and 5DS R images on computers that lack the GPU resources needed to display these images. Images are now downsized to 24 megapixels for display in this case (RAW files remain in their full resolution).
  • Added support for Canon EOS-1Ds Mark III, EOS 750D / Rebel T6i / Kiss X8i, EOS 760D / Rebel T6s / 8000D and EOS 1200D / Rebel T5 / Kiss X70 cameras.

You can download Kuuvik Capture 2 from the Mac App Store for a discounted price until the end of August. This discount serves as an upgrade price for existing users as well as an introductory price.

For the complete list of compatible cameras and computers please visit the tech specs page.

Kuuvik Capture 2 Beta 2 Released

We’ve come a long way since the Beta 1, with some significant departures from how Kuuvik Capture worked in the past. I bet you’ll spot the single most important new feature on the screen shot below.

kc2b2-with-ib

Graphical Image Browser

Session management has been completely rewritten for this beta. It became way simpler, as sessions are now just simple folders. And Kuuvik Capture now lets you quickly browse the contents of the session folder with the help of the Image Browser. You can rate the images with 1 to 5 stars, color label them, and sort according to your preference. Industry-standard XMP metadata files provide workflow integration with XMP-aware RAW converter apps, such as Adobe Lightroom and Capture One. (Well, in theory it should work with Capture One, but my fellow colleagues at Phase One screwed up their XMP parser and 99% of the time can’t load a well-formed XMP. Either ours or Lightroom’s. Even worse, if you enable Full Sync in Capture One, it would corrupt the XMP file… So Capture One is declared incompatible until they fix this.)

As a side effect, Kuuvik Capture can now be used to quickly cull a large number of images. Actually, this was one of the motivations to create the Image Browser. I want Kuuvik Capture to fully and seamlessly support my workflow.

I usually have a mix of images taken with Kuuvik Capture and my cameras alone, so I needed the ability to work on them together. When I’m birding, it’s now uncommon that I return with 2000 images from a single afternoon shoot – 90% of which goes to the trash. But culling with full-featured RAW converters was slow and painful. Now I can sweep through those 2000 images in roughly 1.5 hours – with all the help of the usual Kuuvik Capture tools like sharpening and focus peaking!

Positive Selection Culling

Contrary to the usual “throw out the bad ones one-by-one”, Kuuvik Capture sports a “mark the best & ditch the rest” concept of image culling. During the years, I found the negative approach (throwing out the bad ones) impact my creative process in a very bad way: I’ve been concentrating on the bad images, instead of the standouts. It was a kind of mental torture for me (not surprisingly, I had a huge pile of un-culled or partly culled shoots).

With Kuuvik Capture, I just give stars to the best images, to those that I really like (and those whose technical properties are also good). Then ask the app to trash the others. You also have the option to decrease star rating of remaining images (and start the process all over again). It’s simple, intuitive, and fosters positive thinking about the good images.

Multi-Touch Gestures

This beta also introduces a host of multi-touch gestures. Besides the usual, standard zooming and panning of images, we now support 90 degree image rotation with the flick-rotate gesture (it’s like trying to quickly rotate the image, and Kuuvik Capture detects the direction and rotates the image by 90 degrees).

In live view you can also flick-zoom (both in and out).

Built for the Canon EOS 5DS and 5DS R

The app has been designed and optimized to work with the huge images from the new 50-megapixel bodies. While it’s fast working with them, it became lightning fast on smaller (22 or less megapixel) images. The long delay between beta 1 and beta 2 is partly attributable to this process, as I had to replace a few slow, leaking and generally problematic frameworks with my own implementations. So the complete display engine is new, including the sharpening and peaking filters that now work properly on Retina displays.

Other New Features from the Beta 1

  • Streamlined user interface to give more screen space to your images and to support the new MacBook.
  • New raw decoding engine which is up to 5x faster than the open source library used previously. And consumes way less memory in the process.
  • Improved image display quality.
  • Improved focus peaking visibility in some situations.
  • Exposure information for the currently displayed image below the histogram.
  • RAW label to show when the histogram is generated from raw data (instead of white balanced ‘jpeg’ data).
  • Session information can be overlaid on the displayed image.
  • 11 new guide templates, including golden ratio, a dense 30×20 grid and several aspect ratio lines, such as 1:1, 5:4, 16:9.
  • Selectable guideline color.
  • Color pickers for both peaking and guides allow you to set the opacity.
  • A new menu item and hot key to cycle peaking color presets (yellow, white, green, magenta). Cycling also include your chosen custom peaking color if there’s one.
  • All panels (not just the Navigator) can be quickly revealed.
  • Event Log to notify you about problems that may influence your shoot (such as inability to write to the download folder or interference with other concurrently running remote control apps).

What’s Not In There?

Due to the sheer amount of change in the most basic parts of the app (camera communication, display, sessions), we had to drop two features from version 2.0. First, testing revealed that OS X’s PTP-IP implementation (that was used to drive the cameras through WiFi and Ethernet after dropping Canon’s SDK) tends to corrupt data under heavy load. So I removed network camera support until I roll out my own PTP-IP code.

Second, support for the 1Ds Mark III has been removed as it needs to be operated completely different from modern cameras. We will re-add support as we can put our hands on a 1Ds Mark III for a few days, and only if there’s demand for it (given the limited feature set that camera supports). The 1Ds Mark III is supported in the final release.

Availability

Beta 2 will be released to registered beta testers during the next day. This beta represents the final feature set for version 2.0, and if everything goes as planned, it will be released in the Mac App Store as soon as Apple approves it.

Kuuvik Capture 2 Beta 2: Performance

As Beta 2 of Kuuvik Capture 2 is nearing completion, I felt it’s time to talk about the incredible performance improvements of the product.

Beta 2 switches away from Canon’s EOS SDK in favor of my EOS Extensions library. EOS Extensions powers ShutterCount since its first day, and now Kuuvik Capture uses a heavily expanded version.

This change brings several improvements to the app. It is now 64-bit, sports a more fluid WiFi pairing experience, and occupies less than 10% of the disk space needed for Beta 1. But the most prominent improvements are in the energy consumption and processing speed areas.

Let’s jump right in. The following chart shows the relative energy consumption of the Beta 1 and the Beta 2 (as well as Canon’s EOS Utility for reference) while running live view. The Beta 1 figure is roughly the same as Kuuvik Capture 1 was.

All performance figures are calculated from measurements done on my 2012 15″ Retina MacBook Pro, and may change in the final product – but I think they are pretty much indicative of what you could expect.

kc2b2-energyimpact

Even the previous Kuuvik Capture incarnations were no slouch, but the improvement in Beta 2 is huge. It’s energy impact (which is a number OS X calculates mostly based on CPU utilization) is a tad less than 40% of EOS Utility! Actual energy consumption may be a little different as other parts of the system also draw power, but I would realistically expect 2x longer battery life on my MacBook than what’s possible with EOS Utility.

Also take into account that Beta 2 does a lot more number chrunching during live view than even the pervious beta: it’s output is visually better and now always color manages the live view stream. Because of the latter, the color management section has been removed from Preferences.

I mentioned that Kuuvik Capture 2 ditched libraw (an open-source RAW processing library), and now uses my own code. I cited some 2.2x processing speed improvements then. I’ve hand-optimized the RAW decoder in EOS Extensions, and image processing is now up to 5x faster than Kuuvik Capture 1.

kc2b2-processingtime

In other words, the Beta 2 loads and processes a huge 5DS R file on my MacBook Pro in about 1.6 seconds.

Yes, Kuuvik Capture 2 will support the 5DS and 5DS R. Raw decoding support is complete, and the cameras will be characterized and enabled as soon as my 5DS R arrives.

We have a few places left in the Kuuvik Capture 2 beta program. If you would like to participate, please download and complete the Beta Application and NDA form, and send it back to beta@direstudio.com. If your application is accepted, you will receive download instructions within a couple of days.

Kuuvik Capture 2 Beta Available

The first beta build of Kuuvik Capture 2 is now available. If you would like to participate in the beta, please download and complete the Beta Application and NDA form, and send it back to beta@direstudio.com.

Seating is limited, so we can’t guarantee that every applicant will be chosen as a beta tester. If your application is accepted, you will receive download instructions within a couple of days.

kc2-2

The above screen shot shows the updated black & white peaking mode. What’s new here is the way black & white conversion is done. It handles reds significantly better. For the technically inclined, we are now using HDTV-like luminance calculation, while the old version used SDTV-like calculation.

For the complete list of what’s new in version 2, please refer to my former post.