Install Mac OS X 10.11 (El Capitan) and xCode on VirtualBox

 

  • VirtualBox: https://www.virtualbox.org/
  • Download Mac OS X El Capitan 10.11 via torrent
  • Download xCode from AppStore (inside virtual Mac OS)
  • GPX File editor: Adze Lite (for Mac OS) (download from AppStore)

 

 

 

Chọn kính thiên văn khúc xạ hay phản xạ?

Câu hỏi chọn kính thiên văn khúc xạ hay phản xạ thực chất là câu hỏi: ” Chọn thấu kính hay gương ? “

Đây là câu hỏi rất nhiều bạn thắc mắc khi có ý định mua hoặc tự làm một chiếc kính để phục vụ quan sát, thỏa mãn niềm đam mê của mình.

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How to get rid of the “Your upgrade to Windows 10 is ready” lock

Did you sign up for the Windows 10 upgrade, but change your mind? This may fix your Win7/8.1 updater

You signed up for the Windows 10 upgrade, but now that the bits are ready, you’re getting cold feet. I understand. But there’s one little problem: Your Windows 7 or 8.1 machine won’t install any updates until you install Windows 10. Windows Update may say, “Your upgrade to Windows 10 is ready,” and if you check for updates, you get “Windows Update cannot currently check for updates, because you must first restart the computer so that a previous installation can be completed.”

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Headphones + Speakers at the same time in Windows 7

 

Enable sound output on both speaker and headphone at the same time in Windows 7

  1. right click the Sound tray icon
  2. click Recording devices
  3. right click “Stereo mix” and click Properties
    (stereo mix is a “microphone” that listens only to sounds your computer makes.  It might called something different on your computer)
  4. click the Listen tab and check Listen to this device
  5. Now, if your Speakers are the default device, set “Playback through this device” to your Headphones (and vice versa: if your headphones are the default device, set it to your speakers).
  6. Click OK, OK, and it should work.

Note:

  • There is a signal lag (audio lag, audio delay) between computer Application and Bluetooth headphone. (i.e. when you what movie, you will see image runs faster than audio/sound).
  • If you don’t want such audio lag, select Bluetooth Headphone as the Primary/Default in Playback Device.

This setup is applied successfully to output audio to both (1) Xonar Audio Card to speaker and (2) Sony XB950BT Headphone via Bluetooth connection (wireless via CSR V4.0 Dongle). Software used are iTunes in Windows 7 Pro 64bit.

Source: [link]

Connect to Sony MDR-XB950BT Headphont via Bluetooth

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Connect to Sony XB950BT Headphone via Bluetooth

  1. Place the Bluetooth device (iPhone, laptop…) within 1 meter (3 feet) of the Headphone.
  2. Enter pairing mode on the Headphone. Press and hold the POWER button for about 7 seconds. Make sure that the indicator flashes blue and red alternately after you release the button.
  3. Perform the pairing procedure on the Bluetooth device (iPhone…) to detect the Headphone. When the list of detected devices appears on the display of the Bluetooth device, select “MDR-XB950BT.” If passkey input is required on the display of the Bluetooth device, input “0000”
  4. Make the Bluetooth connection from the Bluetooth device.

 

Led indicators

  1. : Turns on in blue
  2. : Turns on in red
  3. – : Turns off

 

  1. Pairing mode    ○  ○
  2. Connectable      ○ – – ○ – – ○ – – ○ – – ○ – – ○ – – ○ – – ○…
  3. Connecting        ○ ○ – ○ ○ – ○ ○ – ○ ○ – ○ ○ – ○ ○ – ○ ○…
  4. Connected (HFP/HSP or A2DP) ○ – – – – – – – – – ○ – – – – – – – – -…
  5. Connected (HFP/HSP and A2DP) ○ – ○ – – – – – – – ○ – ○ – – – – – – -…
  6. Playing music or during a call (HFP/HSP or A2DP) ○ ○ – – – – – – – – ○ ○ – – – – – – – -…
  7. Playing music or during a call (HFP/HSP and A2DP) ○ ○ ○ – – – – – – – ○ ○ ○ – – – – – – -…
  8. Incoming call ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○…

Hint: when the remaining battery charge becomes low, the indicator turns from blue to red, except for pairing mode.

 

Checking the remaining battery

When you turn on the headset by pressing the POWER button, the indicator (red) flashes. You can check the remaining battery charge by the number of times the indicator (red) flashes.

You can also check the remaining battery charge when the headset is turned on. Pressing the POWER button will cause the indicator to flash and show the remaining battery charge.

  • 3 times: High
  • 2 times: Medium
  • 1 time: Low (needs to charge)

When the battery is almost empty The indicator turns red. When the battery becomes empty, the headset sounds a warning beep and turns off automatically.

 

Reset headphone

1. Soft reset the headset:

If the headset cannot be turned on, or if it cannot be operated even when it is turned on, set the headset in charging status, then press the POWER and BASS BOOST buttons simultaneously. The headset is reset and turns off.

2. Hard reset the headset (to factory default):

Turn off the headset, then press and hold the POWER and PLAY/CALL buttons simultaneously for more than 7 seconds. The indicator (blue) flashes 4 times, and the headset is reset to the factory settings. All pairing information is deleted.

How Canon EF lenses auto-focus on A7ii/A7Rii with adapters

Test result database here: https://docs.google.com/spreadsheets/d/1WdE3DveA2Iz80P-Ta1WWAPhZy9gNSTzAG1i2l3o7SaM/edit?pli=1#gid=1799972419&vpid=A2

Test form for people input their test results here: https://docs.google.com/forms/d/1klEN5jHZd1MS-4mjOUev7Ahyuoo3vSRNOqlCzxGmMrI/viewform

Discussion: http://www.dpreview.com/forums/thread/3935272

Adapter which allow AF for Canon lenses on A7ii/A7Rii:

  • Metabones T Smart Adapter IV ($400)
  • Sigma MC-11 ($250)
  • FotodioX AF Adapter for Canon EF to Sony E-Mount ($100)
  • Viltrox Auto-focus Canon EF/EF-S Lens to Sony E Mount Adapter II ($100)
  • Commlite EF-NEX ($100)
  • Techart EOS-NEX III ($190)     [unstable]
  • No Brand EF-NEX ($50) (apperance similar to Commlite adapter)

Guide to Sony A7ii, A7Rii, A7Sii lens adapters (2014): http://briansmith.com/sony-a7-a7r-lens-mount-adapters/