KBarrett

I upgrade my hardware only every four or five years or so, meaning I don't need new compatible software in the interim.

Its original use was on a 5x5" aerial camera.

So he's using one of the most hotly sought-after lenses in large format photography, which can project an image to cover a 5x5" area, and acts like a 50mm f/0.7 in terms of depth of field for that...

You math almost makes it look attractive, but it make two assumptions that aren't true for all concerned:

1.) This math supposes a user that is starting from scratch and has no existing license of...

Your math almost makes it look attractive, but it make two assumptions that aren't true for all concerned:

1.) This math supposes a user that is starting from scratch and has no existing license...

FF systems already have better alternatives, 24-70/2.8 is a 3x zoom with the same depth of field per angle of view as this lens.

So it's a high production value Google Street View?

It's the sync speed, necessary for using a flash to overpower the ambient light. Canon's fastest is 1/300, available only on the APS-H EOS 1D IV.