Triangle F7 on A Nikon D7100

[vhainne]

Hi im using D7100 and 50mm 1.8D lens but after notusing is for 3-4 months when i open it its show a Triangle F7 and i cant fixed it.

Is anyone here who could help me.

Thank You

[ameerat42]

Hi Vhainne.
First, welcome to AP.

I have moved your post out of the other thread into its own, as it is a different and separate problem.

Meanwhile, try this:
Switch off the camera and then remove the lens.
Next, set the lens aperture ring to its widest stop - f/1.8.
Put it back on the camera and switch it on.

[jim]

It appears to mean that the camera thinks you have a non-cpu lens attached (which you don't) that has been set to f22 or thereabouts. It's indicative that the camera is having problems communicating with the lens. Assuming that you've tried all the usual taking it off and putting it on, switching off and on stuff, you could try cleaning the contacts, both on the lens and on the camera. Do you have a different lens you can try?

[vhainne]

Yeah i had a diff lens and its working properly... but i have a an event so i need it

- - - Updated - - -

Next, set the lens aperture ring to its widest stop - f/1.8.
Put it back on the camera and switch it on. - HOW??

[ameerat42]

I mean switch the camera back on.

[arthurking83]

Lens should be set to largest f number(smallest aperture size).
Like Jim said .. set lens to f/22, and (depending on the actual lens) there should also be a locking tab too and it should be over the 2.8 number or thereabouts with the lens set to f/22.
Note that it moves around but can't be locked unless the lens is set to f/22. the locking tab has an orange dot, which lines up with an orange dot on the aperture ring.
If they aren't lined up the tab is not locked.

That should be locked in(tab towards the camera body) so that the aperture ring doesn't move accidentally.