cctv_down_under

That is a good point mentioned before about the need for less cameras with Megapixel cameras. I fairly recently saw a a demo where 1...yep 1...camera covered almost an entire 50,000 seat stadium, mind you it was more like 4 cameras in one, the stitching technolgy and each camera being mega megapixel in size meant that the file size was huge but it recorded inside itself on HDD and from memory streamed a much lessor quality and bandwidth. I actually managed to make out faces from the far end of the stadium to the furtherest point away...very cool. Sure the camea is probably around $40,000 each, but lest face it, to cover the whole stadium would be that much and then some!

http://www.marchnetworks.com

Anyone? http://www.digitalsi.com.au/default.aspx?ProductID=10133

The Dibos does 32 Analogue and 32 IP cams

I agree about the lense section, here is something I posted at another cctv forum. Does anyone really even use non IR correct lenses anymore? Most of the main manufactorers offer IR Correct lenses that are correct for IR Illumination between at least 400 - 950nm. Normal lenses do not cater for the focal shift between the physical and IR parts causing a blurring effect, you can see this with the two attached images, Picture 1 is an IR Image with a normal lens and Picture 2 is an IR Image with a Compensating Lense. Some of the advantages are: Day/Night camera with IR illumination - Colour image during daylight. - Monochrome image is focussed using IR illuminator during night. Monochrome camera (in outdoor lighting) - Image stays in focus using IR illuminators - Sharper Dusk/Dawn image because IR light part is focussed. - Less car headlamp blooming caused by out of focus IR light I do not know if you remember when you were a child in science class and they made you use a prism to refract the white rays of the sun, I am sure if you did this excercise you would have noticed the rainbow pattern that emerged on the other side of the prism, you also would have noticed that the red colour was at one end and violet at the other, that is because red has the longest wavelength or lowest frequency, Ultra Violet is even higher than Violet and therefore when refracted through the lens means the focal plane recieves different frequencies at the same point. This basically means the focal point will vary for different colours. This actuall effect is what is called colour distortion or more commonly known as Chromatic Abhorration (spelling?). There are many and I do say many other distortions that can affect a lense for example; Barrel, Pincushion and Sperical, the actual name of the distortion directly relates to the effect they represent. The dilema for lense manufactorers is that in order to produce a good lense they will need to add as many corrections to the lense as possible, but this means adding more elements to the lense making it more expensive to manufacture, keep in mind there are already a combination of two similar thickness convex and concave lenses that have to be manufactured just to make all the colours come together and form a single focussing point. When shopping for a good lense you should consider the following (and much more) in order to determine the quality: - Number of Elements - Abborration (spelling) correction in design - Type of Glass Manufactoring and process - Precision of grinding and polishing (ultimately important) - Anti Reflection and Internal Light Reflections but obviously these are not always available to find out. The shorter the focal length of the lense the more optical elements have to be added to correct the above mentioned distortions which in turn makes the lense more expensive. Expense in manufactoring is the major reason that good quality lenses are much harder to afford and one of the most common distortions that can affect a lense is Spherical Aborrhation, a lense that is spherically grinded and polished is simple to machine and therefore less expensive, however the focus is not a very precise single point. Aspherical Lenses are much harder to grind because of their shape (kind of like a wave or bell shape) but these lenses offer a more precise focal point, wider angles of view, shorter minimum object distances and much less optical elements (less need to correct the lense), but beware some manufactorers (yes even big ones) have started to produce moulded aspherical lenses, and avoided the expensive grinding process and these lenses do not offer the same glass quality as properly machined aspherical lenses do. In reality too many people choose lenses based on the F stop measurement which is a good guide but not the most important factor. The T Factor of a lense is much much more critical as it indicates the lenses level of light transmission. All lenses that encorporate glass will loose some level of light as it passes through the lense and those that loose less are usually of a much better quality glass than those that do. You have probably heard the term "Japanese Glass" and this is for a reason. ~ I hope this helps

Who originally did the job, what was there name?

Middy, Try these places; http://www.altech.com.au http://www.geovision.com.au http://www.kudos-security.com http://www.tstg.com.au There is also a spyshop is SA that sells geo but not sure which one?

CBC I assume

I know this will sound stupid, but you arent trying to connect to a local IP range from outside the network are you?

Thanks loop, just wanted to know if anyone has an opinion on it?

I didnt mind the GE standalones, but I just saw too many failures with their cameras to warrant using them constantly.

Huh? Perhaps all us folk down here are simple or something? I have heard of "Eats Roots and Leaves" but that is reffering to our native Koala Bear....or myself in my Hey Day!

I think the cold over there is getting to you.... I think they are trying to show you the split between the acronym and the plural. Besides I know the guy who owns the site and he is a good operator, spelling really doesnt bother me so long as he keeps up his good service. Very hard to find good wholesalers in this country. I would recommend this company to anyone in Australia and NZ who operate in the mid range of security operations. I will have to say his equipment is not on Par with say Bosch or Pano, but the best bet is he doesn't try to pretend it is. I might point him to this link....maybe he wil give me a better discount I was just wondering what his DVR is, I have heard good things about it but wanted to see other peoples experiences, dont need to know where to get it, just if anyone has been using it?

Huh phred, wot u mean?

try 1 x pos only and do not connect the Gv Data Box, you actually do not need it some times, also be careful what voltage you put through the data capture box it is low voltage and also check what your center pin is for the plug pack!

That is correct, you push a button on the side of the camera and the picture will lok the same to you, but it is now in back focus mode, so you do a normal focus and adjust the ring without having to adjust Iris, Level or use a ND Filter, yes you can set that by PC but you do not have to, all the functions that are set by PC excepting controlling PTZ's and Upgrading the ROM can be done at the camera only if need be.

I think the Bosch camera and in particular the Xf is the easiest to set up, for example, there are three modes 24hr, Low Light and Traffic, it only takes two button pushes on the camera itself to change to these modes and they automatically adjust all the settings, IE Low Light increases the gain and Traffic changes the shutter speed, I do not see how it can get any easier than that, you don't have to use a laptop! I must admit I have only used the SDII and SDIII and they are excellent, in fact the SDIII supports backfocus adjustment electronically and even remotely so I can not comment on the others.

Very sorry Rory, Have a pint or two for me!

I agree with the above diagnosis, but how long is 300ft in meters, have you checked you are getting enough voltage at the camera? I doubt its anything other than interference though

Why the frig dont Geo do one application that can view and see the logs of all cams...its stupid -- everyone uses the web viewer but viewing one camera only in the log is a waste and no one wants multiple apps like RPB for playback and TCP for viewing, seems insane really!

MAAAAAAAAN! How many times have I seen them images LOL

My installer has run cat5 for a site I am doing with 50 odd cameras, some of the runs are over 150 meters and I suppose this is why he did it (wish I knew I would have just used the XF camera), he is using a passive balun at the camera end and a rack munted recieving station (also passive) that recieves 4 x cat 5 and converts to coax, I am concerned with running 24V AC on such small wires and within the same sheath, can there be some issues with this becasue some of the cameras will draw at least 500ma?

Looks like it will be ok, the Bosch cams operate at 12vac to 28Vac so should be ok, I will definately use two wires for power and double up the guage - so long as the installer did not go for several cams in one cat5.

Dont think Geo does, but I knwo the PTZ's with inbuilt autotracking do

Might be better to go with a cam that has limited vertical smearing! The other option is inversion, tis makes the headlights black and means that the white part of the plate is balck as well, you can make out plates quite nicely this way.