USB3 vs USB2 Planetary Transfer Speeds

[Ron Hillstromb]

  An interesting query on another topic was will USB 3.0 capability give faster transfers of captures in Planetary mode.

 

  I just did a table top test using my 7DMkII and my trusty old 60Da.  Both captured at comparable speeds of 22 to 26 FPS each.  I used a lens on the 7DMkII and the 60Da had my 2 inch adapter which had a cap on it for the test.

 

  My initial conclusion is that the camera processors probably set the frame capture speed.

 

  I don't have time at the moment but will probably try setting the movie speed to 60 fps manually before connecting to BYE just to see if that will effect the speed in planetary capture.  Don't know anything about the SDK and if it may allow control of that feature.

 

  Felt this branch of the other topic warranted its own path.

 

Ron

[Jim]

What type of USB connection do the cameras have?

 

If they are USB 2 then they will be limited to USB 2 speeds, whether they are connected to a USB 3.0 port or not.

 

Jim

[astroman133]

However, if you have a USB hub that uses USB 3.0 to run to the PC, there may be some overall advantage for all devices.

 

That said, I use USB 2.0 throughout and have never had a problem with overload when running 5 USB devices (mount, imaging camera, guide camera, focuser, and TEMPerHUM).

[Ron Hillstromb]

The 7DmKII is native USB 3 and the 60Da is USB 2.  I used a Surface Pro 3 with Core I7 processor.

 

  I was expecting a gaoin in speed but in retrospect there is one Canon that delivers only about 10 FPS while the models before and after were faster .

 

Ron

[Jim]

The model that only delivers 10 fps is the 650D, the one I bought before this 'feature' was widely know ;^))

 

Jim