Rabu, 05 Maret 2014

What is the best time of the year in 2013 to buy a digital camera?

Q. I figured before Christmas of 2012 would be a bad time to buy one, but what would be the best time of 2013 to buy one, taking product cycles into consideration? I don't know too much about that, really. Thanks for any input!

A. The best time to buy a camera is now.

If you wait until tomorrow when the prices may have dropped you have wasted another day not having a camera. Because tomorrow arrives and tomorrow they may be cheaper... another day of your life gone.


Underwater wireless live streaming Camera?
Q. So I am building an underwater ROV and my team needs a camera to mount onto our robot. It needs to be water proof, but if you have to buy a separate box it might be okay. It should be wireless, but we could run a Ethernet cable if we have to. And of course it needs to be able to live stream onto a laptop on the surface of the water.

I have looked into using a Go Pro, but I am unsure of what model to get and Go Pros seem a little pricey, so cheaper options may be better.

Does anyone have any ideas on what i can use? If i use a Go Pro i need to know which model is best, but I would like cheaper options if they exist. Thank You

A. Underwater wifi is relatively new and not "readily" available.
http://nypost.com/2013/10/17/yes-underwater-wi-fi-is-a-thing/
at least, not from regular stores. If you are depending on the GoPro wireless connectivity to do what you want, I would bet against it - at least for now. That means some sort of tethered version. As far as I know, there is no wired, direct, "streaming" capability that will do what you want. Remember, the GoPro is a camera/camcorder and designed to capture video locally to a memory card.

Wireless communication is one thing - wireless video is a whole different animal (bandwidth issues in the aquatic/marine environment).

And if you are using a robotic craft, I am guessing the ROV is going to be more than 100 feet away which means if on land, would be on the edge of wifi's reach - underwater, even more so. The GoPros included waterproof housing is rated to only 40 meters (~130 feet).

A camera-only (no local recording), with a cable, solution may be a more do-able option. Since we don't know how deep the camera needs to go and we don't know how far away the camera will be (it could be 5 feet deep but 300 feet away) it is impossible to actually make a recommendation. This shallow, but far away is different than 300 feet deep because of the pressure exerted at that depth.

Your solution may be as simple as
http://www.amazon.com/OceanDrop-Underwater-Training-Observation-Inspection/dp/B007EFG3N2
which is even more than the GoPro. This is an underwater wired camera designed to do what you want. Similar to a security camera, it has a single cable that includes connections for power and the video feed. The power is supplied on the computer side of the cable - the camera does not carry local power. The camera does not store video locally, but sends the video over the wire to an analog/digital converter. This can be a standalone box like those from Blackmagic Design, Roxio, Elgato, Thompson/Grass Valley/Canopus or a card fitted to the computer.

And keep in mind that at about 40ft-50ft and deeper, you will likely need to add light. Underwater lighting can be pricey...





Powered by Yahoo! Answers

Tidak ada komentar:

Posting Komentar