I have D70S, with a 18-55mm 3.5-5.6 VR (this exact lens Nikon DX 18-55mm 1:3.5-5.6 VR Lens Review: 1. Introduction: Digital Photography Review ). My Aunt has the same body as me, D70s, with a Tamron 28-75 2.8 (This exact lens: Tamron SP AF 28-75mm f/2.8 XR Di LD Lens Review ). This comes into play later, trying to diagnose my problem. I'm having auto focusing problems. Keep in mind that my lens apparently has it's own focus motor, that is suppose to be faster and quite. With autofocus on (yes, the lens and the body are on AF), it autofocuses very slowly. I have to point it at the subject, hold the button half way for about 5 seconds while it finally clicks into focus (beeps). And it is very quite unlike my aunt's (which uses body's motor apparently) so it is using its own motor like it should, well most of the time. Accasionally, i will get a second of the loud focus motor, so i guess it is trying to use my camera's motor too??? Now, my aunt has the exact same body as me, D70s, Sooo i grabbed her camera and took some shots. First of all, apparently this lens uses the body's focus motor. So therefore yes it was loud, however it snapped into focus very quickly. 100x faster than mine! So then i swapped lenses. Her Tamron, on my D70 body. It worked pretty well! It definately still snapped into focus still, on my body. So i guess my body's motor is good? My lens on her body worked well too. Oh, and also, my lens is VR. On my body, when in VR mode, it shakes the view finder incredibly. Works great on her D70s body. What's up with this! What's the problem here! Ive been told about a software update of some sort for my d70.. any info on this? My body seems to be rejecting newer stuff... so maybe it would help. I have no idea. Cliff notes: -My body, my lens = slow autofocusing, VR mode doesn't work -Aunt's Tamron lens on her body = all around perfection -Aunt's Tamron lens on my body = seems to be flawless, quick focus, etc.However it MIGHT of been slightly sluggish compared to on her body, i wish i still had it here. -My lens on my Aunt's body = works fine, still not as fast as the Tamron though i dont think. VR works. Thanks. I'm thinking i just need to get a AF lens and not a AF-S to sort of jump over this problem i can't find, or i can send my stuff in. My body's motor seems to work great and the lens' motor seems to suck but it still worked on her body so i don't get it. Software update??