EOS-1D X Aperture won't go below f/4

[Bipolarlens]

Hello!

just got a 1DX and my aperture will not go below 4. Is there anyway to fix this? 

thanks! 

[kvbarkley · Accepted solution]

What lens?

Some lenses can only go down to f/4.5 or so.

[Bipolarlens]

This was it…I was so sad for a second. Have the 24-70mm f4…so there you have it! I will be able to go lower with my 50mm and 85mm for sure. Thank you for the prompt response! 

[kvbarkley]

There is a custom function to restrict the Aperture range that may be coming into play: