![File:Plot of CIE gray-scale calculation for self-luminous devices, for optotype E subtending 10 arc minutes.svg - Wikipedia File:Plot of CIE gray-scale calculation for self-luminous devices, for optotype E subtending 10 arc minutes.svg - Wikipedia](https://upload.wikimedia.org/wikipedia/en/thumb/9/9c/Plot_of_CIE_gray-scale_calculation_for_self-luminous_devices%2C_for_optotype_E_subtending_10_arc_minutes.svg/1200px-Plot_of_CIE_gray-scale_calculation_for_self-luminous_devices%2C_for_optotype_E_subtending_10_arc_minutes.svg.png)
File:Plot of CIE gray-scale calculation for self-luminous devices, for optotype E subtending 10 arc minutes.svg - Wikipedia
ANNOUNCEMENT: Updated list on non-programmable calculators allowed to be used in the CIE Exam... - Philippine Institute of Industrial Engineers - Mother Chapter | Facebook
![Is this calculator allowed for 0580? And if yes, is there any official proof of it? My school won't let me use for some odd reason, and I can genuinely do nothing Is this calculator allowed for 0580? And if yes, is there any official proof of it? My school won't let me use for some odd reason, and I can genuinely do nothing](https://preview.redd.it/is-this-calculator-allowed-for-0580-and-if-yes-is-there-any-v0-uo0fvnu3o5m81.jpg?width=640&crop=smart&auto=webp&s=fc8a907092c3a701d7a3a083743297e7383a7627)