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Showing posts with label budget. Show all posts
Showing posts with label budget. Show all posts
Wednesday, April 11, 2012
Wednesday, March 21, 2012
What is a SWIR camera?
Government and military technology eventually seems to find it way to consumer markets- GPS and night-vision being two great examples.
There is a new technology in early development called SWIR, or Short Wave Infrared camera technology.
Users want to use camera to see in darkness, and the ubiquitous technology uses IR sensors (often arrayed in a ring surrounding the lens) to detect Infrared waves. Being outside the spectrum of visible light, these waves can be detected in darkness, but often with very limited range. A typical IR range might be 10-30 meters for a home camera, and IR detection tends to consume a lot of power.
Along comes SWIR which actually still uses IR, but at the fringe of visible light. Instead of detecting classical IR wavelengths (aka, HEAT), these detect reflected IR energies. They offer advantages in power consumption and perhaps even camera range. The technology is new, using GaAs detectors (which few semiconductor companies can produce).
Watch for SWIR technology to start finding it's way into consumer camera in the next few years!
Labels:
active-x,
aperture,
budget,
camera,
CAT-V,
clip,
ddns,
ddns router,
depth-of-field,
focus,
ip camera,
ip camera analog,
swir
Wednesday, February 22, 2012
Can I FOCUS an IP Camera?
..not really. Like point-and-shoot cameras, most IP cameras do not have a manual focus. This is generally not a problem however, since the objects in view are distant enough to not require focusing.
And also like point-and-shoots, you cannot vary the depth-of-field, aperture or F-Stop settings, so a shot like this would not be easy!
You can, in some cases, find alternate lenses for your camera. I've seen wide-angle, fish-eye and other options. Note that since these lenses tend to distort the photo geometry, they may not be useful for details like facial recognition, license-plate legibility, etc.
You can also sometimes find interchangeable lenses which offer other lens diameters.
What WOULD be nice, but I haven't seen, are UV or other filters.
I have noticed that some IP Camera controls do offer focus- so I tend to think that some manufacturers probably offer it. I haven't seen one yet, however.
I have noticed that some IP Camera controls do offer focus- so I tend to think that some manufacturers probably offer it. I haven't seen one yet, however.
Tuesday, February 21, 2012
Sunday, February 19, 2012
OK I Want an IP Camera- How do I get one ON A BUDGET.
You can get some great deals on IP Cameras, if you're willing to (a) take some changes, (b) live with poor or no customer service, (c) get used gear, (d) possibly have to return for a , and replacement, and (e) live without leading-edge features.
Having said all that, here is my my personal strategy. Personalize this for your own use!
- Go to AMAZON.COM . Search for IP CAMERA
- sort by price, lowest first. Start drilling down on some of the more attractively-priced options
- look at the 1-off sellers, that is, Amazon sellers who sell on Amazon, but are not Amazon proper.
- Check their feedback, and even send them a message (to see how quickly and comprehensively they reply)
- When you're confident you found a bargain, and you trust the seller and his feedback, order a camera
- When you get the camera, inventory and test it quickly. If there is a problem, message the seller quickly. It may not be an issue if software is missing - check the manufacturer's site for downloads.
As I check today, I see most indoor PTZ IP Cameras are in the $100 or so price-range, yet using these steps, I see some under $50, NEW! That's a nice savings.
And if you're an Amazon Prime member, you may get even more discounts.
In contrast, I checked EBAY and although I found many options, I found higher prices, in general. The best Foscam deal I found was about $75 shipped, which isn't bad, but is of course not $50 !
NOTE- this selections are not H.264, so you're gonna give up some image quality in return for your savings.
Happy shopping!
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