Monthly Archives: December 2013

Bluetooth Speaker Sound Delay Fix Macbook Pro

Suffering 1-2 second sound delay between video on Macbook Pro and bluetooth speaker (Jabra Solemate in my case) I searched for a solution.  Updating the bluetooth speaker firmware (from version 1.33 to 1.34 on the Jabra Solemate) solved/fixed the sound video sync delay problem for me between a Macbook Pro Retina (2012) and a Jabra Solemate bluetooth speaker.  Sound and video synchronization is still not 100% perfect but the delay is very small and almost imperceptible unless you’re really looking for it.

Sony A7r vs. Leica M9 Dynamic Range Compared

The Sony A7r camera body vs. Leica M9 camera body sensor dynamic range comparison in these two photos illustrates the advantage Sony has in its latest 24MP CMOS full-frame camera sensor (same as used in the Nikon D600/610).

Sony A7r with Leica 75mm f/2 lens

Leica M9 with Leica 75mm f/2 lens

(Use left & right arrow keys on your keyboard to flip back and forth between the Sony A7r photo and the Leica M9 photo on Flickr.)

The lights and darks in the Sony A7r photo contain color and definition of lines and texture.  They’re not just white and black.  Compare the Sony photo to the Leica M9 photo where the bright and dark areas are mostly just white and black without much visible definition of what is in those areas.  Colors are also more recognizable in the Sony A7r photo compared with the Leica M9.  Granted, the Sony A7r camera CMOS sensor is basically one year old, whereas the Leica M9 CMOS Sensor, released in 2009, is now 5 years old.  This type of dynamic range difference between Sony sensor and Leica sensor 4 years older, should be expected, regardless of manufacturer.  Chip technology will continue to advance whereas lens designs and materials are much more stable and only improve slowly over time.

Another thing to keep in mind is the Leica APO-Summicron-M 75/2 ASPH (aspherical) lens mounted on the Sony A7r is using an adapter mount and is not meant for the Sony EF mount.  There are few lenses available for the Sony A7 and Sony A7r for the moment, so there’s currently a rush to find out which lenses work well with this new full frame mirrorless camera.

Once Sony releases lenses that are meant for this brand new full-frame body, we should see some more comparable photo results vs. off-brand (Zeiss, Leica, Voigtlander, etc.) lenses.

(Photos by Dierk Topp)