My guess is that I would want to see 6 feet by 6 feet at a distance of about 25 feet. I will check out the calculator.
One of the models I am considering is DVC-CMD728HW. The specs may be a bit to good for my purposes.
"680TVL 36IR Color Dome Camera, 1/3 inch Sony Super HAD CCD, Hitachi 14 Bit DSP, Starlight 0.001 Low Lux, 2.8~10mm Vari-focal Lens, SDNR, SBLC, 256 zone exposure, 256 zone ATW, Vandal Resistant, Weather Proof, Indoor/Outdoor, White"
I don't know anything about LTS brand.
- John