L Series too good for Xsi?

[Daniel Browning]

I have been saving for a 300mm f/4 is, but I've heard that I shouldn't invest that much for the xsi.

I say go for it! Your Xsi will thank you.

My question is that is there a notice able difference in image quality and sharpness between say the xsi and the 5d mark 2 with this lens attached?

Yes. They give a different angle of view, though. If you move forward with the 5D2 to get the same angle of view (which is not always possible or desirable), you will get the same angle of view, and the 5D2 image will have better sharpness and quality.


But don't let that stop you. Go for it!