blueSLR is a software/hardware solution that brings bluetooth remote control to your compatible Nikon DSLR camera. It also allows you to use your iOS device to geotag your photos as you take them. I've been a fan of geotagging my photos for years and while I've used several different dedicated hardware solutions for Nikon cameras, I'm really jazzed about the blueSLR solution. First off you do have to have a compatible Nikon DLSR camera (Nikon D3100, D5000, D90, D3(s), D200, D300(s) or D700). You then plug in the blueSLR module and fire up the blueSLR App on your iDevice.
Remote Shutter Release and Geotagging
The App allows you to wirelessly snap the shutter, auto focus and do time lapse/burst shots all from your iOS device. Since it's bluetooth based you can use it just about anywhere without having to worry about being on a WiFi network. Not only does this allow you to get into the shot, but it also is great for those low light long exposure landscape shots that you can't really do handheld.
geotagged photos from the blueSLR attached to a Nikon D700 showing in Adobe Photoshop Lightroom 3 with a one button click to go to Google Maps to see where the shot was taken.
Having a bluetooth remote is sweet, but i'm even more excited about the Geotagging feature. Now my iPhone becomes my Nikon DLSR camera GPS as it can use GPS satellites, cell towers and WiFi hotspots to plot my location. This makes it much more flexible than traditional GPS units that require line of sight with a satellite. This is great for geotagging indoor locations as well such as monuments and museums. Also since it's writing the data directly to the images as I take them there is no post production matching up to do. It's accurate and on the spot!
Settings to fine tune your workflow
One setting you'll definitely want to enable is the GPS when locked. This means that you can put your iDevice away while still using this as long as the App is running in the foreground. This will help your iOS device's battery life as the screen doesn't need to be on for this to work.
The Bottom Line
This is a great solution for any Nikon shooter! It really gives you two tools for the price of one. I'd love to see a couple more things in the App though. First off the App doesn't work in the background. You have to leave it running in the foreground to communicate with the module on the camera. Not sure if that's a technical limitation or not, but I'd love to see it run in the background in an update if at all possible. Next, I'd love to see a quick link from the current location to Google Maps on the iDevice just to verify the current location. Having the longitude and latitude displayed on screen is nice, but those numbers don't mean much to me without an easy way of verifying them. Otherwise this App is awesome!
You can get the blueSLR App for Free here from the 
While the App is FREE it doesn't do anything for you without the hardware. You can get the blueSLR module for your camera for $149 here.
See my blueSLR hardware review here.
I’m sure it’s a YMMV situation, but I’ve found the accuracy of my iPhone location to be really spotty, often jumping between an accurate reading (likely via the GPS antenna) and one hundreds of miles away (likely the registered address of whatever ISP is behind whatever wifi hotspot I happen to be walking by). So take care to understand how your phone handles your situations.
But even without reliable geoencoding, it really does look to be a very cool product.
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Does a simular app exist for Canon?
Thanks
Nevermind,
Canon Digital SLR Cameras:
Support for Canon Digital SLRs is coming soon. Add yourself to our notification list by completing our contact us form and you will be notified with launch updates.
Source: http://blueslr.com/SupportedDevices