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Searched up and down…in and out…some said can use, some said cannot.
I gave up…reading.
Went and took out a  Jobo SD/SDHC/SDxC to CF card Type II Adapter to try for myself on the D3s. No, cannot fit. The Type II adapter is just half a mm too thick. There is no way you are going to be able to insert a Type II card into a Type I slot.
Piled open the  Jobo SD/SDHC/SDxC to CF card Type II Adapter, figured out if I can throw away the casing, there might be chance that I will still be able to insert the adapter into the D3s Type I slot.
After some careful surgery on the Jobo, it is now naked. I slot in a Sandisk SDHC memory card into the Jobo adapter, then carefully insert it into my D3s. It is a try an error process, as without the CF rails at the side, you can’t really tell if you have inserted the card correctly into the PINSsssss of the CF slot in the camera. Warning! If you accidentally bent or broken the CF pins inside the camera, it is going to cost you $$$ to get it repaired! I figured out that since D3s has TWO CF slots, so I can just risk one slot for my experiment. 😛
After some effort, I was able to insert the Jobo adapter into the D3s. Yes, it works! D3s can immediately detect and read the SDHC card in the Jobo adapter. Shooting is fine as well, all photos are recorded perfectly onto the card.
Now it comes to the main purpose of the experiment. Getting Eye-Fi to work on my D3s!
This is actually the easier part, as there is no modification required on the Eye-Fi. Just slot in the Eye-Fi to the Jobo naked adapter, then carefully insert it to the D3s, and done.
But…before that, you need to actually setup the Eye-Fi on your computer. It is an easy process as well. Just plug in the Eye-Fi card to your computer with a supplied USB adapter, and the software inside the Eye-Fi will prompt you for installation. Just follow the screen instructions and you are done.
Now…does Eye-Fi works? Yes, it does! In fact is works like wonders!
This is how the Eye-Fi Center software looks like. No, you don’t need it as a photo sorter or whatever, just use it to configure the setting of your Eye-Fi.
The Eye-Fi card that I used is the best version from Eye-Fi: Â Eye-Fi 8GB Pro X2 SDHC Memory Card
With the capability of transferring RAW file, and some other advanced features. (read comparison at Eye-Fi website: http://www.eye.fi/products/compare-cards)
In short, as a summary, Eye-Fi + Naked Jobu SD/CF Adapter, works like wonders! Transfer speed is amazingly fast via home wireless network! A 3-4MB Jpeg file is transferred within 5 seconds. RAW file is less than 10 seconds. I am impressed! I saved lots of my time for product shots, without having to pull out the memory card, plug into my card reader, then computer, then copy to my computer, then only I can edit. See how many steps and time it saves!
For those who do studio works, I can imagine Eye-Fi being a real helper in your studio work!
A note on D3 / D3s user. Make sure you set your D3s “Auto Meter Off Delay” to 1 minute or longer. Default is 6s. The reason is because after shooting, Eye-Fi needs the camera to provide it powers to transmit the files via home wireless network to your computer.
For Android or iPhone user, you can download Eye-Fi app from the market. Installed to your phone, configure it and you can then have Eye-Fi sending images to your phone while shooting! (You need to enable WiFi on your phone to connect to Eye-Fi wireless network).
It works! It works like wonders! Amazing product, amazing technology. I am impressed. 🙂
Great article, thanks you so much for the information. One question though, i have sucessfully converted the cf>sd converter and have seated the card in slot 2 and can save images to it so i know its working. I know the card is transmitting because i can test it on my pc and can connect to it, but once i place it into slot 2 the wireless network no longer shows up on the wifi menu system so i can connect to it. Is there something other than the delay setting i should do inorder to maintain power to the card so the wifi network is available to choose?
Hi Steaphan,
I tested on both Slot 1 and Slot 2, no problem.
You have to set your camera to NOT sleep for a long period (I set mine to 30 minutes), so that the EYE-FI will continue getting power from the camera to transmit photo.
Are you referring to the Auto Meter-Off Delay?
Yes.
How’s your converter looks like? Naked housing?
It’s seems that the setting has no effect. The only thing I can see is you have a Pro x2 card and i have a connect x2 card, that may be the issue. The housing i was easily able to strip down and the card takes images just doesn’t broadcast the wifi signal for my ipad or pc to pick up
If you can record photos to the card, then try insert the card into a card reader and then insert to your computer. The EYE-FI shall still send photos to your computers once it got power.
yea, but that kinda defeats the whole wireless thing, trying to get it to braodcast to my ipad on site so cients can see the images as i shoot
Hi Steaphan,
You misunderstand me. My suggestion above is to check whether your EYE-FI is working correctly or not. If it can transmit images wirelessly when you connected to a card reader, then you can at least be sure that you have done the correct setting on the card and computer. Then narrow down the problem / troubleshooting to your D3s.
To transmit images to iPad, it requires setting up the EYE-FI card in computer first. I can’t remember the details, please check EYE-FI website. You need to also download the apps from iTunes on your iPad.
I checked it and it transmits to my ipad perfectly from the card reader. So it seems there isn’t enough power getting to the card when it is in the D3s.
What brand of adapter are you using? Not sure if it affects or not.
DigiGear Extreme SD-HC-XC to CF Adapter
a person in the Flickr forums said he used it successfully
Have you tried the normal method? EYE-FI connect to WIFI and transferring to PC?
yes, the wifi network that is the card doesn’t show up when it’sin the camera, it only shows u when it is plugged into the pc thru the card reader. Seems that there just isnt enough power getting to it.
Try update the firmware, and try contact EYE-FI, their support is good.
Well I just tried it on my D300 and the same thing, not enough power to have it show up in the wifi menu to connect to, so it seems the converter may have been damage or has an issue. Thanks for your help i appreciate it.
Does this adapter fit in D800?
Hi Kengyan,
D800 has SD slot, so you don’t need the adapter and can use EYE-FI directly on D800 via the SD slot.
Yes sir, do understand that, just need to have 2 cards inserted since shooting with D800 under raw can fill the card up very fast.
You can just insert a normal CF card in the CF slot. EYE-FI on the SD slot.