Is this a spec / RFP? I mainly ask to know if it needs to be exactly F3.8, Zoom - 12.5 - 1000mm or is that the general range you are looking for?
IPVMU Certified | 05/13/15 02:49pm
Zoom: 12.5 - 1000mm
That spec is 80x, not 60x. Can you clarify if you need the focal length(s) or the range?
Optical zoom in that range is going to be tricky. Digital zoom can do that easily. They've asked for an analog camera, but how about a megapixel that would allow you to use that level of digital zoom while retaining at least 520TVL-quality output?
Sure the camera would cost more, and if they're saying analog because of existing coax infrastructure, you'd need to spend extra on EoC adapters... but I bet it would still come in cheaper than a single lens that will provide that kind of zoom range, if such a thing even exists.
Even a simple 1000mm prime lens would be huge, especially at f/3.8 (aperture would have to be 263mm diameter, or over 10").
I'd suggesting finding out if that RFP is based on an older camera's spec as being "60X zoom", which in a lot of cases would include digital zoom, with separate optical and digital zoom factors listed in the fine print...
I did find this, designed for a 1/2" sensor: http://www.2bsecurity.com/Datasheet/Lenses/50xzoom_1000mm.pdf
50X zoom, 20-1000mm. Lists as f/3.5 but that's probably just at 20mm, which would only be a 5.7mm opening. At 1000mm, that would be about f/175. The whole thing is 130mm wide and nearly half a meter long.
Fujinon lists a couple 12.5-750mm (60X) lenses as well, C-mount for 1/4" - 1/2" sensors. One is f/3.8 and clocks in at 365 x 154mm and 5.8kg... the other is f/2.1 and a whopping 670x274mm and 20kg(!!!)... and again, those apertures are only at the shortest focal length.
Just for reference, this is a 1200mm, f/5.6 Canon SLR lens:
IPVMU Certified | 05/13/15 04:06pm
A, if the important specs are:
60x lens, f/3.8, analog camera and single vendor, then this Cohu8800 seems to fit...