NEC PA1705UL-W Installation Manual page 140

THROW RATIO Adjusts according to the projection ratio of the optional lens used.
* Adjustment ranges for NP51ZL, NP52ZL, and NP56ZL are provisional values.
NOTE:
• When power is supplied to the device, the adjustment value of the [KEYSTONE] used previously is retained even if the gradient of
the device is changed.
• As electrical correction is carried out by [KEYSTONE], the brightness may be reduced or the screen quality may deteriorate sometimes.
• Some combinations of adjustment values may limit the adjustment range.
Lens unit Adjustment range
NP51ZL 5 - 7
NP52ZL 6 - 9
NP53ZL 8 - 13
NP54ZL 12 - 21
NP55ZL 19 - 40
NP56ZL 39 - 75
105
5. Using On-Screen Menu