[rogerg (Roger)]

Hi all,

I'm having intermittent issues with data connection between DSLR cameras and computers where my USB cable lengths are at their limit of 5m. I'm looking for any comments on suggested solutions before I go to the extreme of major re-working of my USB "network".

I have two cameras in question - 350D and 7D. The 7D is significantly more problematic over the same cables than the 350D, presumably due to the significantly greater data transfer requirements.

I have this chain of USB:

DSLR
1.2m USB cable
USB Powered Hub
5m USB cable
USB Powered Hub
3m USB cable
PC

Any suggestions on how I can improve the reliability?

Options I see in front of me include:

- a small PC at the base of pier which means 2.2m USB to camera only, and then use remote desktop or such to access DSLR functionality from there. This is a costly, perhaps cost prohibitive, solution, and also leaves a PC box at the base of the pier (undesirable). I have wondered what minimal sized PC box I could find for this.

- direct 3m cable + 1m cable (total 4m) from DSLR to PC. This is OK in some situations depending on telescope position for in-person-usage but isn't suitable for my normal automated observing because it restricts telescope movement and has cable strung across the gap from PC to scope (normally cable duct through floor).

- using a Canon Wifi grip instead of USB. This is cost prohibitive from what I've seen - about $1400!!!

Thanks,
Roger.