1.4X tele and DOF Question

I've been looking through the forum and can't find the answer to my question.

When I attach a 1.4X tele to my 70-200 F2.8, my F stop goes to 4, but since the aperture is still a 2.8 on the lens (the tele just blocks one stop of light correct?), my DOF will still be the same as if I was shooting with the 2.8 and no TC correct? Or is this a misunderstanding of how the Teleconverter works?

Thanks,

Ryan

No, the optical solution is still f/4

The t-con has, with the introduction of the new elements, turned your lens into an f/4 lens.

You do not need an adjustable aperature to make an optical lens soultion with a higher f/stop. If you did, then all lenses would be f/1 untill you stopped it down.

CyberDyneSystems wrote in post #1998406
No, the optical solution is still f/4

The t-con has, with the introduction of the new elements, turned your lens into an f/4 lens.

You do not need an adjustable aperature to make an optical lens soultion with a higher f/stop. If you did, then all lenses would be f/1 untill you stopped it down.

Thanks CDS.... Makes sense.

Thanks,

Ryan