Lense Hood Shadow

[Mgoppert]

I just received my 10D and to my dismay the lense hood on the EF 17-40 F/4L leaves a shadow on the bottom of the pictures. Using the EF 28-135 IS does not pose this problem. Being a Newby I read the instructions twice and matched the red dots to no avail .
WHAT AM I DOING WRONG ????

[PacAce]

mgoppert wrote:
I just received my 10D and to my dismay the lense hood on the EF 17-40 F/4L leaves a shadow on the bottom of the pictures. Using the EF 28-135 IS does not pose this problem. Being a Newby I read the instructions twice and matched the red dots to no avail .
WHAT AM I DOING WRONG ????

Did the lens hood originally come with the lens? If not, then that's your problem. You should be using a matching lens hood for your wideangle lens.

[Dans_D60]

Are you using the built-in flash? If so this is normal as many canon lenses especially with the lens hood extend too far and will cause a shadow. If you’re not using the built-in flash I can only assume the wrong hood?
Dan
http://www.pettusphoto.com

[Mgoppert]

The lense hood came with the lense in the same box (USA Version). I was not using the flash ???

[Dans_D60]

Mgoppert wrote:
The lense hood came with the lense in the same box (USA Version). I was not using the flash ???

Model EW-83E?

[slin100]

Can you double-check the part no. of the hood? It should be EW-83E.

Another possibility is that you put the hood on upside down. From what I can tell, the hood is asymmetric.

[defordphoto]

mgoppert wrote:
I just received my 10D and to my dismay the lense hood on the EF 17-40 F/4L leaves a shadow on the bottom of the pictures. Using the EF 28-135 IS does not pose this problem. Being a Newby I read the instructions twice and matched the red dots to no avail .
WHAT AM I DOING WRONG ????

You're not doing anything wrong. However, the 28-135, fully extended to 135 WILL create a shadow. The only way out of it -- when using the built-in flash, is to remove the hood.

[Mgoppert]

I just checked the hood and the number is EW-83E/A.
When on the camera and the red dot is aligned the writing on the lense hood is at the top.

[PacAce]

Mgoppert wrote:
I just checked the hood and the number is EW-83E/A.
When on the camera and the red dot is aligned the writing on the lense hood is at the top.

Do you get a shadow only at the widest zoom setting or it it there all the time no matter what focal length you're using?

How about posting an example of what the shadow looks like.

[slin100]

Just for grins, have you tried mounting the hood upside down? Maybe the red dot is in the wrong place.

[RGorrill]

Hi,

When properly mounted on the lens the lens hood should not have any of the writing on top. It should be on the underside of the lens hood. When the hood is properly mounted the solid red dot on the hood should be on the underside and the solid red dot on the lens should be aligned with open red dot and red line.

Bob


Mgoppert wrote:
I just checked the hood and the number is EW-83E/A.
When on the camera and the red dot is aligned the writing on the lense hood is at the top.

[Mgoppert]

That may be my problem , everything matches like RGorrill says except the writing is on the top of the hood. I'm going to contact Ritz Camera about this.

[slin100]

rgorrill wrote:
Hi,

When properly mounted on the lens the lens hood should not have any of the writing on top. It should be on the underside of the lens hood. When the hood is properly mounted the solid red dot on the hood should be on the underside and the solid red dot on the lens should be aligned with open red dot and red line.



I'm not sure this is right. This page (http://burren.cx/photo/ew83d.html) clearly shows the writing on the top. Then again, maybe the hood is mounted wrong in the picture!

[Belmondo]

I strongly suspect it's your built-in flash creating the shadow. Try shooting the picture in something other than full auto with the flash turned off. I can almost guarantee you'll lose the shadow.

I just took a picture of my ceiling using the 17-40 at its widest setting, and with the lens hood on. I get a semi-circular shadow across the bottom 1/3 of the image. With the lens hood off, I still get a shadow, but considerably smaller.

There is no top or bottom on the lens hood. It's impossible to put in on wrong. The whole thing is absolutley symmetrical---the top and bottom are the same, and the left and right are the same. The indexing tabs on the lens make it impossible to install improperly. The worst you can do is to install it 180 degrees off, but that won't make a bit of difference.

Try one of the other settings (like Fv or Tv). You'll lose the shadow.

I had a similar experience with my G2 using the wide angle add-on lens. It was a wedding, of course, and it was really a bummer when I finally got a chance to look at the pictures.

This is another good argument for a 420EX or 550EX flash attachment.

Good luck.

Tom

[robertwgross]

belmondo wrote:
I strongly suspect it's your built-in flash creating the shadow.


The original poster stated that he was not using flash.

I'm curious as to what causes a shadow, if there is no flash. The only thing that makes sense to me is that it is a vignette shadow, not a flash shadow. So, if there were some strange filters or lens hoods, that could explain something.

---Bob Gross---

[Belmondo]

Bob...

I'll bet you dollars to donuts he had the camera in full auto mode and didn't even realize the flash was functioning.

Unless there's something wrong with his camera, It's really unlikely that it's anything other than shadow caused by the built-in flash.

Anyway, I'm on my laptop right now, but when I get back to my other computer, I'll post the picture I took of the ceiling---it certainly creates exactly the type of shadow he describes.

Whatever it is, it's not worth arguing about. We're all just trying to help the guy.

As for me, I'd almost rather they didn't put the flash on the camera to begin with. I recall one person who was trying to take a picture, but the flash popped open (or tried) and hit the bill on his baseball cap. I guess it made a very strange noise and took him a while to figure out what was happening.

[robertwgross]

belmondo wrote:
I'll bet you dollars to donuts he had the camera in full auto mode and didn't even realize the flash was functioning.


How in hell can you ignore that the built-in flash has popped up? I know when mine pops up, because it hits my baseball cap.

It is possible to be unaware of whether it fired or not. Quite often, when I am using two or more external flash units, I will ask a bystander... "Did my flashes fire?"

How can you ignore that the flash unit is "out" and ready?

---Bob Gross---

[Belmondo]

Your guess is as good as mine.

Anyway, here is my ceiling, taken in full auto mode with the 17-40 and lens hood on.

http://www.bytephoto.com/photopost/data/500/35317-40_shadow.jpg

Doesn't that look like what he describes?

[Belmondo]

robertwgross wrote:
belmondo wrote:
I'll bet you dollars to donuts he had the camera in full auto mode and didn't even realize the flash was functioning.


How in hell can you ignore that the built-in flash has popped up? I know when mine pops up, because it hits my baseball cap.---Bob Gross---


Maybe he wasn't wearing a baseball cap.

He did state that he had just gotten the camera. It's possible he's a newer user and as such didn't realize the flash was working. Who knows?

Let's hope he tells us if this is the answer so we won't lay awake tonight worrying about it.

Good luck.

Tom

[CyberDyneSystems]

The lens hood that comes with the 17-40mm when used on a camera with a 1.6X crop factor is hopelessly insubstantial. There is NO WAY that the 17-40mm lens hood could vignette on a 10D. I use a lens hood similar to the one that comes with the 70-200mm on my 17-40mm!!!!

[Mgoppert]

I want to thank everybody for your ideas. After reading all your posts and having the shadow both with flash and without, I took my Camera to Ritz. They found that I had a defective filter. Now I should have been able to figure this out myself and not bother everybody. Again thanks for your help.

[Belmondo]

Boy, is my face red. Guess I'll get out of the advice-giving business for a while. At least you all got to see my family room ceiling.

Hey, CDS, where do I send the donuts?