Comparing real pro cameras to home grade. More than resolution specs.

fastline12 said:
Would there happen to be any calcs or info regarding FOV, distance from target, and pixels to generally determine how good an image might be? We have a couple well lit areas where I would like to place cams in the corners, so a 90* FOV, with target distances of 20-100ft. If a 4MP cannot cover that, I might consider a 8MP. The one area I am thinking of would be covering entry and OH doors to 3 buildings, plus the main gate, so sort of an important one. I plan to have supplemental cams specifically targeting each gate, on the entrance side to grab very good detail of subjects approaching the card readers, and gathering vehicle and tag info. Just mentioning that I don't expect the 90* cam to do it all.
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3.6mm (90 degree horizontal Fov) fixed 5442 (4Mpx) allows You to Identify at 22ft...
3.6mm fixed 5842 (8Mpx) allows You to Identify at 34ft...

You can try to add to that 30%.. but anything more You need 2 cameras - one overview + one zoomed..
 
steve1225 said:
3.6mm (90 degree horizontal Fov) fixed 5442 (4Mpx) allows You to Identify at 22ft...
3.6mm fixed 5842 (8Mpx) allows You to Identify at 34ft...

You can try to add to that 30%.. but anything more You need 2 cameras - one overview + one zoomed..
Click to expand...
I can get dealer pricing on anything. Not saying it would be better than Empire, but....

I am currently looking at the Dahua BF2241 ?
 
fastline12 said:
I can get dealer pricing on anything. Not saying it would be better than Empire, but....

I am currently looking at the Dahua BF2241 ?
Click to expand...

this is the same low end line (Lite) with small thermal resolution (256x192) and small/weak video image sensor and very closed aperture - but previous generation od Eureka.. So lower AI (or no AI) comparing to what Andy have..

Here You have PRO thermal line with bigger thermal resolution (400x300 or 640x512), one fixed model even with 1/1.8" image sensor :
Pro Series - Dahua International

Here You have Ultra series:
www.dahuasecurity.com

Ultra Series - Dahua International

Ultra Series
www.dahuasecurity.com www.dahuasecurity.com

As I told You good thermal costs a lot..

And In case of higher thermal cams You should hire someone who have a lot of experience with those type cams to help you choose and implement them in Your case / Yours need (with local inspection)...
 
My 50.6 degree FOV thermal andycam triggers its IVS on things that a side-by-side 5442 misses. Examples are deer at 160', cat at 100', and small animals like tiny birds and mouses at 25'. Just examples as I haven't done any formal testing. At night many animals that the thermal IVS trips on don't exist on either the visual camera or 5442 image. I can look at the timeline replay at the exact time and location and there's simply nothing there on the visual cameras. During the day I can spot the little critters on either visual camera. The thermal resolution of course sucks, as does the visual camera's IVS, which is worse than with my 8 year old cheap chinese market cameras. It could be that the human/vehicle filters are active even though I have them shut off. But with the thermal camera catching critters the visual cameras can't, that poor visual IVS isn't a big problem. In the big picture I guess it's reasonable to consider it a toy, but this toy catches animals none of my other cameras can, and with very few false triggers too.
 
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I learned a new feature of the thermal cam, because of a fire I have burning about 100' from the camera.

Capture3.JPG

It retries every few minutes and closes up again in less than a second. Hope I'm not breaking it.
 
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