Holy ****atauke Mushrooms! Some Questions About my Temporary Toy

PhilGarber · Jun 30, 2009

I don't think I read on the website that rentals were restricted to the US.

HeY iTs ScOTtY · Jun 30, 2009

whats it like having a hubble telescope one your dslr? lol

PhilGarber · Jun 30, 2009

It sure feels like the Hubble when it's on my neck.

musicaleCA · Jun 30, 2009

Soocom1 said:
Yes the focus ring WILL work in AF mode, but not advised. It can damage the teeth inside the mechanism. It is best to just switch to MF if that is what you intend to do.

He's talking about a USM focus mechanism. They were designed with full-time MF in mind.

PhilGarber · Jun 30, 2009

Thanks CA. I was wondering why the comments seemed contradicting.

musicaleCA · Jun 30, 2009

No problem. I believe he meant the older versions, but USM systems are designed to have continuous MF.

Soocom1 · Jul 9, 2009

Well Again, I have the 70-200 f4.
I have used the focus ring in AF, and found alot of resistance in it. Personally, I wouldnt reccemed useing it is AF mode. Just haveing personal experiance with things of this kind (and being an auto mechanic and gun nut) I have learned not to force things that dont like to move freely.

bigtwinky · Jul 9, 2009

So are you going to post some pics taken with the lens or what??

Big · Jul 10, 2009

How much does it cost to rent one of those? Like per day for instance?

FrankLamont · Jul 10, 2009

I'll answer anyway...

1) The IS modes depend on whether you want to be able to pan... IS 1 covers everything (vertically + horizontally), IS 2 only vertically
2) Infinity focus. It's pretty straight forward.

Focus at infinity... focusing from whatever distance to infinity.
3) 1.4m-infinity means that the lens will seek focus for the full focus range of the lens (1.4m is minimum focusing distance for the 70-200mm) and 2.5m-infinity just means it only searches past 2.5m
4) Unless the lens is an AF/MF and then -> MF lens, you shouldn't turn the focus ring without setting it to MF first. If the lens has the AF/MF option, you can autofocus and manual focus at the same time (not stopping it while it's autofocus is running, of course, ie, the ring is turning)