[Tips] viewfinder diopter & charging tips

How to correct diopter

The viewfinder eyepiece is neutral and not adjustable. But you could install an extra Nikon DK-20C diopter corrector onto it with the viewfinder kit in the box.


install the viewfinder kit
install the diopter correcter via side slots
  • Nikon DK-20C diopter range:-5 ~ +3
  • -, negative for nearsighted
  • +, positive for farsighted
  • You could refer the glass degree and divide 100 to calculate the diopter


The diopter of SL42 Mark II & updated Mark I is neutral.

The diopter of SL42 Mark I is native -3 and you could adjust it based on this diopter.

The viewfinder kit is also available for Nikon DK-21 eyecup.


Tips about charging

  • Type-C charging port of SL42 did not support QC protocols. The USB Type-C to Type-C cables and high power adapters (>40W) are usually not available for charging SL42. 
  • USB Type-A to Type-C cables are always available with DC output of 5V1A (5W) or 5V2A (10W). The power adapter usually has a USB Type-A output port.
  • Available for power bank
  • Available for charging while using