D90 wont take pictures due to F--?

[nyczSZx]

Once In a blue I get a blinking F-- on my LCD panel.. What does this mean? It wont let me turn on Live View or even take pictures... Should I be worried? Has this happen to you too? How would I fix this.

 

[Zak Forsman]

it usually means the lens is not seated properly.

z

 

[Evro]

Hi there, what lens are you using?

Generally speaking that is the message you'd get if you're using a non CPU lens or have no lens installed on the camera.

 

[Jeff Anderson]

To add to that make sure you are set to manual if using a non CPU lens - if it can't meter its not going to take pictures in anything but manual mode. Not sure if it will enter LV or not... Mine just lives in manual mode 99% of the time...

 

[Park Edwards]

if you have a non cpu lens, put it in M, if you do make sure you f stop ring is at f22

 

[nyczSZx]

I am using the stock 18-105 VR nikon Lense and sorry noob question what is cpu lense -_-...

 

[nyczSZx]

I also like to add this usually happens when I focus all the way to 105mm

 

[squig]

lenses from 1981 onwards (ai-s era) are cpu lenses

 

[Evro]

Crikey! That's a newer lens. Sounds like a lens electronics/mechanical problem.

 

[wes]

this happens to me randomly. I have the 18-135 and I just take it off and put it back on making sure the connections are clean. Works.

 

[ingrid]

F-- Stop problem

F-- Stop problem

I have the same problem with my D90. I use the kit lens, 18-105. It will be working fine, and then it quits working. Sometimes the camera comes back when I turn it off and turn it back on, another time it came back when I switch the setting from macro to A. just now I reseated the lens and it came back.

I bought it at Costco and am within my 90 day return window, but hate to return it.

 

[lasvalley]

Return it or repair it.

 

[Zack Birlew]

Well, my Tamron 28-300 3.5 does this whenever I try to do manual aperture with it. What I have to do if I want it fully manual for video is that I go into LV mode, regardless of mode, and then switch the f-stop there. The lens error pops up but I can still take video with it and adjust the aperture to a degree. I know, that doesn't help much, but that's just something I've found.