Frustrated with LACK of Bokeh. T2i Owners??

[Chamelion 6]

I think they explain it pretty good here:
Depth of Field and the Small-Sensor Digital Cameras - photo.net

From this article...

"If you use the same lens on a small-sensor camera and a full-frame camera and crop the full-frame image to give the same view as the digital image, the depth of field is IDENTICAL."

Things are getting crossed here, at least as I'm reading it.

A 50mm lens is still a 50mm lens regardless of sensor size. The DoF is going to remain constant. The smaller sensor is still the same distance from the focusing element as the full frame sensor. See the above statement.

What changes is the Field of View, not the Depth of Field. A 50mm lens has the same aparrent Field of View as an 85mm lens. You've not made the image on the sensor any bigger, you've simply captured a smaller area of it.

Unless you start moving the focal point around, the DoF stays the same.

 

[LightSpeed]

Because a FF will take my 50mm f/1.4 lens and see it as a 50mm f/1.4 lens. On my T2i, which is a crop body (x1.6), the 50mm is actually an 80mm lens.

So 80mm at f/2.8 is going to have more background blur than a Full Frame using the same lens that actually see it as 50mm at f/2.8... because assuming that everything in the scene is EXACTLY THE same *except* for the bodies of the cameras... since the focal length is longer on my T2i than on the full frame, the blur will be more on the image taken by my T2i.

That's a good explanation, but I don't think that's what he meant. The difference is very slight , almost too slight to see. Maybe one stop. What is, however, noticeable is the vast difference in field of view. Not to be confused with depth of field. There are endless arguments and debates about this. If lens focal length is the same the difference in depth of field from a cropped sensor to a full frame sensor is negligible, very negligible. This might help.

Full Frame vs Crop Sensor Depth of field myth