EDIT 27.3.2015.:
http://www.npk-spp.ru/deyatelnost/avionika/166-ols-35.html
IR wavelength range: midwave IR
Tracking area: +-90* horizontal, +60*/-15* vertical
Detection range v/s Su-30: 90 km from rear aspect, 35 km from the frontal aspect
Laser rangefinding: up tp 30 km
EDIT 28.3.2015.:
Click to access su-35_buklet_rus.pdf
Detection range vs aerial target: 50/90 km
Range finding vs ground target: 30 km
Range finding vs aerial target: 20 km
Number of targets that can be tracked: 4
History and War 
Apparently the justification for the F-35 is to fight aircraft armed with this system. Unless the Su-27 variant pilot is incompetent, that will not end very well for the F-35 pilot.
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United States seem to preparing mainly for wars against Arab countries, so F-35 may well perform as expected – through no virtue of its own.
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I suppose if they manage to sell these to the expected enemies, the disadvantages would be negated – both sides using a subpar aircraft.
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