.....missing the point with DSLR controller. usually the point of shooting tethered is to ….
2. have a hard drive that the images can be stored on immediately outside of the CF card. DSLR Controller doesn't solve those issues.....
I disagree on this second point, or else I'm missing this second point.
I'm not using a tethered tablet to store my entire catalog.
I have only 47 apps downloaded onto my ASUS MeMO Pad™ FHD 10 with 32GB internal storage, as I write this, 23.5GB of that internal storage is available.
This ASUS tablet accepts up to 64GB mircoSD cards, I'm using a 32GB card, 22Gb are currently free. These microSD cards easily pop in and out of an external slot much like our camera's CF/SD cards, they are incredibly tiny and so easy to carry many. MicroSd cards are not as fast as CF cards but speed isn't a priority for me when tethered.
Between the tab's internal and removable microSD storage I have plenty storage for a shoot.
.... usually the point of shooting tethered is to 1. have a large screen to preview images....
This ASUS has a 10.1" LED Backlight WUXGA (1920x1200) Screen. It's marvelous for 10X live viewing.
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I chose this tablet primarily for it's screen, it's main reason to be purchased was to tether my 6D.
My usage pretty much mirrors the OP's stated intent and quite economically too.
Take another look at DSLR Controller’s capabilities and features
, the list is quite impressive.
Mind, I'm not trying to sell anyone on this particular ASUS, it's just the one I chose. There are many to choose from.
Also, as need or situation dictates, I also use my smart phone for tethering, same app, a single app purchase price and it runs on all my androids.
Another feature I've found but isn't listed is shutter count.
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Regarding BBF and DSLR Controller’s balking when BBF is set; I've found pretty much all my base hand held settings differ from my tethered settings so I set all my base tethered settings including shutter button focusing as a Custom Shooting Mode, all I now need to remember is to rotate the mode dial to 'C1' before tethering. Of course I usually forget this little step and have to re-connect.
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Do you have to turn off back button focus settings with CamRanger? I'm intrigued for macro shooting.
Can't say about CamRanger, but DSLR Controller rocks for macro shooting, stacked shooting is built in, no touch the camera's BBF, all focusing is done remotely.
From what little I know of CamRanger, it's the thing if you need wireless tethering over a distance.
If cabled tethering will serve, DSLR Controller is less hardware intensive, plug it in and it just works.