I've been using one that cost about $60 from a local camera shop. I own an expensive Bogan that seldom gets used because it is too heavy to lug around, and part of the leg hardware broke, so it falls off if I over-extend. I've found that even the very heavy pods will wobble if you press the camera shutter button. But even cheap tripods seem to work fine if you use a cable release, or self-timer, to actually trip the shutter. Is your new 70-300mm one of these new light, compact, zooms?