three thumb rings for fine level adjustment
The cover extends back past the hood and when the hood is extended the focus ring is exposed
30PsF are displayed as 1080/25PsF
protects lens against dirt
POWERTRON USR 4-4020 1R000 D 1% Through Hole Resistor, 1 ohm, 750 V, SIP, 30 W, � 1%, USR 4-4020 Series Tiffen 77HZE2A three thumb rings for fineThis is a Through Hole Resistor, 1 ohm, 750 V, SIP, 30 W, 1%, USR 4 4020 Series product from POWERTRON with the model number USR 4 4020 1R000 D 1%Product details Temperature Coefficient 3ppm K Power Rating 30W Resistor Element Material Metal Foil Automotive Qualification Standard Resistance 1ohm Resistance Tolerance 1% Product Range USR 4 4020 Series Resistor Case Style SIP Voltage Rating 750V Other details Brand POWERTRON Part Number USR 4 4020 1R000