DOF at long ranges ??

egordon99 wrote in post #10196509
I have no idea....

Canon needs proof that YOU purchased the item NEW from an authorized retailer.

9/10 they don't really care that your name is on the invoice, so really it is just the receipt showing purchase date. I have bought used things that include the receipt which is actually useful for warranty purposes. Other brands like Tokina require the receipt AND warranty card.

coeng wrote in post #10196477
Then why do people include a "blank warranty card" in the item description when selling a used lens?

send it in. canon has warrantied at least one secondhand lens for me and i didn't have a card or receipt.

ed rader

ed rader wrote in post #10196554
send it in. canon has warrantied at least one secondhand lens for me and i didn't have a card or receipt.

ed rader

Curious if they also repair cosmetic things. There are some scratches on the barrel that would be nice to have taken care of.

coeng wrote in post #10197195
Curious if they also repair cosmetic things. There are some scratches on the barrel that would be nice to have taken care of.

they fixed a scratch on my 40D when i sent it in to have the shutter repaired...just painted it a little though..


that doesn't look right at all...also you say it's not the filter, but i've heard canon filters aren't the best

DreDaze wrote in post #10197324
...also you say it's not the filter, but i've heard canon filters aren't the best

Not following what you mean there. I took the filter off and repeated the test shots and achieved the same result. That took the filter out of the equation as being the source of the problem.

coeng wrote in post #10197357
Not following what you mean there. I took the filter off and repeated the test shots and achieved the same result. That took the filter out of the equation as being the source of the problem.

i know you established it's not the cause of the problem...i'm just saying after you do get it fixed, you might want to make sure it doesn't cause any problems then...yeah it may not make a difference when the shot is bad from the lens to start...but i'd check it after you get it fixed to make sure it won't affect a good shot straight from the lens

coeng wrote in post #10196477
Then why do people include a "blank warranty card" in the item description when selling a used lens?

Because people think it has value. It doesn't.

You need the original receipt. The name doesn't matter, Canon just wants to know the purchase date. If the date code is UX05 or later, you can probably talk to Canon and argue that it has to be under warranty and get away without a receipt.

Technically, only the original owner has warranty coverage, but I don't think Canon really cares.

toxic wrote in post #10197429
Because people think it has value. It doesn't.

You need the original receipt. The name doesn't matter, Canon just wants to know the purchase date. If the date code is UX05 or later, you can probably talk to Canon and argue that it has to be under warranty and get away without a receipt.

Technically, only the original owner has warranty coverage, but I don't think Canon really cares.

This is interesting. Most computer products have an associated purchase date with it right? I've returned dozens of HDs for RMAs due to damage and they usually already have a warranty date associated with the serial. I guess it's interesting Canon doesn't do this and requires a damn receipt. Quite annoying although its ridiculous 1 year policy makes it somewhat easier. If we had 3 year, 5 year warranties, asking me to keep all these receipts would be annoying.

Can you manually focus on something static to get an in focus image? Try at 200mm at 6 ft away, then 10 ft away, then 50ft, etc.

Here are the test shots....

First, we have the set up shot to show relative distances. Taken with my Blackberry so forgive the bad IQ.

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Here's the tank that was closest to me:

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Here's a sign that was nearby. Shot from my car window, handheld.

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jacuff wrote in post #10197780
Can you manually focus on something static to get an in focus image? Try at 200mm at 6 ft away, then 10 ft away, then 50ft, etc.

Here are four shots where I tested manual focus. It was getting late in the day so I really had to bump up the ISO. These were also handheld, no time to setup tripod. I could have done a better manual focusing job if I wasn't pressed for time. But the point I am making here is clear (I think).

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Forgot to mention that I also ruled out the body being the problem this evening. I tried the lens on a Rebel XTi and observed the same results.

I wouldn't deliberate any longer. Burn the images to a disk and ship it along with the lens to your closest Canon service centre. That lens isn't focusing correctly, bite the bullet & send it in. You'll be happier when you get it back and it's working great.