Most of the apps I have seen have you tether your camera into a computer on a wifi then the iPad or iPhone will use the network through the computer to access the camera. I think some of the newer cameras are now access a wifi network directly so an iPad/iPhone does not have to use a computer for an interface.
Smedley Whiplash wrote: .........................I'm not convinced a direct video feed would work well on an Ipad. Amazon sells little 7in LED monitors for that for around $175.
iPad does not do HDMI in. Most video output from DSLR's is HDMI. The little gadget mentioned in other posts is a great idea, but $300 bucks is pretty spendy (though maybe no more spendy than a bunch of eye-fi cards which may or may not work well in all circumstances).
I have been in direct contact with Apple development people (at Apple). They are considering adding HDMI "in" to the next iteration which would make the iPad usable as an external monitor for both photography and video. Pretty hard to imagine an external monitor that would beat the iPad for picture quality and price.
I would encourage photographers and videographers to contact Apple Development to encourage them to include HDMI 'in' in the next coming iPad.
I'm pretty sure I'm getting one for Christmas - if I do, I'll post a review.
Have one, works beautifully! I've used it with both my iPhone and iPad and it even works from a few hundred feet away. Of course the further away you go the slower the transfer and any walls in between will slow it down but that's WiFi for you...
The newer cameras offer more control through it than the older cameras do. I've run my D3s, D700 and D800 through it and the D800 gives me the most control which is fully understandable as AF and Focus points are analog switches on the older cameras.
My biggest need for it is to set up remote cameras and have the ability to look through the live view on anything but a laptop.
R Michael Walker wrote: Saw that too. Let me know what you think if you get one.
Okay, I did get one. I also have an Eye-Fi card, so here's my $.02.
I was disappointed with the Eye-Fi card. When it worked, it worked well, but it seldom worked long. I got it to make it easier to discuss poses with my models. However, it always seemed to stop working during a session for no reason that I could see. I spoke to their technical support people, but never got a solution to the problem. Frankly, I found it embarrassing to pull out my iPad to show a shot to a model and then have it not transfer.
The Cam-Ranger costs more ($300 versus as little as $30 depending on the size of the Eye-Fi card) but it does more and does it better. One advantage is that it only transfers a thumbnail of each shot, rather than the full-sized JPEG - you then tap on the selected thumbnail to transfer the full JPEG. I'm sure that this helps keep the system from getting bogged down by rapid shooting.
In addition to transferring images for QC, you can use it to control the camera for long exposure, bracketed exposures for HDR, time lapse, self portraits, or just controlling the camera remotely. You can control exposure and focus (manually or autofocus where you select the focus point by touching the spot on the image where you want to focus). It sends the liveview image to your device (I'm using an iPad and I also have it installed on my iPhone). There is an Android app and they are supposed to be writing Mac and PC versions of the software.
In general, I think that the Cam-Ranger is the way to go; I can't recommend the Eye-Fi. My one caveat - I haven't had a full photoshoot since I got my new toy - I've just played with timed exposures & HDR, so I can't say that I've given it a full shakedown yet, but it was easy to install, worked out of the box, and everything that I've tried so far has worked.
Panasonic's Lumix GH3 that was released in December 2012 does this out of the box.
It has built in wifi and free apps for both iPhone/iPad and Android.
You can use your tablet or smartphone as both a tethered external monitor and a remote control that can control many camera settings along with the shutter release. I have a firmware hacked GH2 predecessor which does incredible video. Tempted to get the GH3 as I would love to have a very compact kit in a small backpack that allows me to do tethered macro while hiking. Just as useful as the iPhone apps for light meters and model releases.
My prediction is that Canon and Nikon will eventually adopt wifi iPad/tablet tethering for their pro-full frame models. I personally also think they will eventually adopt a lot of mirrorless technology in professional full frames including getting rid of the mirror-box as EVF technology is quickly closing that gap.