Big 2d fan here. Very sturdy if you have the extra mounting block (don't know what to call it. If I don't use it or forget it at home I worry about shake when I am focusing close up. I have 2ds in 5x7 and 8x10. The 5x7 is no problem hauling it around, I just wish the extension rail was attached to the camera. I have dropped it more than once which is a problem because replacing the extension would cost more than buying a new camera. The 8x10 is just plain big and awkward, but the negs are sooooooo cool.