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Unable to change Aperture on Cannon T1i with 50mm F/1.8 STM lens

Started Dec 18, 2016 | Discussions
AXLOZ New Member • Posts: 4
Unable to change Aperture on Cannon T1i with 50mm F/1.8 STM lens

I brought a new Cannon 50mm F/1.8 STM lens and after I put it on my Cannon Rebel T1i I have been playing around with it to change the Aperture settings. Unfortunately I have not been able to change it.

Any thoughts? I made sure that my lens was attached properly and it is. I am very eager to use the lens and take pictures but this has been frustrating so far that I am unable to change the aperture settings.

Canon EF 50mm F1.8 STM Canon EOS 500D (EOS Rebel T1i / EOS Kiss X3)
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Lemming51
Lemming51 Forum Pro • Posts: 15,278
what have you tried?

There are different procedures for changing the aperture, depending on the exposure mode chosen, still pics or video?

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mocha123 Senior Member • Posts: 2,497
Re: Unable to change Aperture on Cannon T1i with 50mm F/1.8 STM lens
1

Hi AXLOZ,

Set the PASM dial(Blue) arrow to AV and then turn the (RED) dial right or left to increase or decrease the Aperture.

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OP AXLOZ New Member • Posts: 4
Re: what have you tried?

First installed the Canon 50 mm lens (F1.8) STM.  THEN I set it to a Manual Mode, Pressed the AV button and while it was pressed, I moved the dial to see if the aperture settings change. It didn't change.

OP AXLOZ New Member • Posts: 4
Re: Unable to change Aperture on Cannon T1i with 50mm F/1.8 STM lens

Here are the settings I have. I keep the AV button pressed and move the slider around and the F number does not change at all. It is always at F00

inkblot
inkblot Regular Member • Posts: 211
Re: Unable to change Aperture on Cannon T1i with 50mm F/1.8 STM lens
5

AXLOZ wrote:

Here are the settings I have. I keep the AV button pressed and move the slider around and the F number does not change at all. It is always at F00

F00 indicates that the camera did not detect your lens. Either the lens is damaged or the electrical contacts of your lens (or camera) are dirty/corroded.

To check your lens, try this with another camera if you have another eos or if you can borrow one. If it also doesn't work with other cameras, then send it for replacement/repair.

Try also to clean the contacts of your lens and camera with a contact cleaner or by rubbing it with clean dry cloth. Do not use any corrosive solutions.

Hope that helps.

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