sensor distance

[jimwc6491]

Does anyone know the distance of the sensor from the front of the lense mount. I kneed to know this distance so I can properly set the back focus on my focal reducer.

 

[astroman133]

That is called the Flange Focal Distance. It varies by camera brand, but should be the same for cameras with Canon EF mounts.

You can measure it yourself with a ruler. You just need to find the Focal Plane Mark on the camera body. The Mark is a circle with a line through it that is parallel to the focal plane.On my T5i the Focal Plane Mark is on the top of the camera body just to the right of the loop for the left camera strap when looking at the camera from the rear.

Also for my T5i the Flange Focal Distance is 44 mm. I measured it and then confirmed it online.

[jimwc6491]

Rick

its for my canon T3i. Now that I know what to look for I can measure it.

Thanks

Jim