Canon 17-55 2.8, not happy
Canon 17-55 2.8, not happy
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Discussion

Zaxxon

Original Poster:

4,057 posts

189 months

Tuesday 8th March 2011
quotequote all
I bought this in November 2010 so it is still under warranty so it's not too bad.

The damn thing is full of dust. I have not used it in bad conditions and I have been carefull when changing lenses but is has several large bits behind the front lens.

For such a top quality lens this is pretty poor in my opinion.

I went out last night to take phots of the space station (too late to set up properly but I did get to see the ISS and Discovery going past, which was terrific).

I then spent a while taking some night shots and when I got home I could see these bright red dots in the same location on all of my images.

Looking online it seems to be a common trait with this lens as zooming in and out sucks in dust.

I will be sending this back to be cleaned. However is there an optional lens for portraits or landscape that I could replace this with, that doesnt act like a Dyson every few months?

Preferably an EF lens as I may wish to go for the 5D Mk III when it is out.

Edited by Zaxxon on Tuesday 8th March 11:12

Nick Grant

5,497 posts

264 months

Tuesday 8th March 2011
quotequote all
The red dots are not dust. They will be hot pixels in your camera.

Zaxxon

Original Poster:

4,057 posts

189 months

Tuesday 8th March 2011
quotequote all
I don't notice them with my 100-400.

Great so does this mean that my new 550d is shagged as well?

Is this normal for Canon kit?

Nick Grant

5,497 posts

264 months

Tuesday 8th March 2011
quotequote all

SamHH

5,078 posts

245 months

Tuesday 8th March 2011
quotequote all
I agree that the red dots are more likely to be hot pixels than dust. Hot pixels can occur with any make of camera and are more prevalent with long exposures.

Were you doing like-for-like shots with the two lenses when you were getting the red dots?

Zaxxon

Original Poster:

4,057 posts

189 months

Tuesday 8th March 2011
quotequote all
Are my expectations too high for this kit? I cannot believe that I am having these issues with a £650 body and £700 lens.

If I had this happen on my £200 limix point and shoot I would send it back to the vendor and ask for my money back.


SamHH

5,078 posts

245 months

Tuesday 8th March 2011
quotequote all
Regarding the lens, I agree it is annoying that an expensive lens has a particular tendency to get dust inside. Mostly I don't think it will cause a noticeable degradation in image quality though.

Regarding the hot pixels, it is an unfortunate problem of digital sensor design. Some sensors have more of a tendency to do it than others and sometimes individual sensors have a manufacturing defect, much like dead pixels in LCD monitors. It might be that your camera has a defect; it would not be unheard of. Do be realistic about the limitations of what a digital sensor can do though.

How long were you exposing for and at what sensitivity? Did you try using the long exposure noise reduction setting?

Nick Grant

5,497 posts

264 months

Tuesday 8th March 2011
quotequote all


You know Alex, owning a DLSR is like making love to a beautiful woman. You have to understand thier faults, lavish them with expensive gifts and be careful how long you expose them before they get too hot biggrin

JustinP1

13,363 posts

259 months

Tuesday 8th March 2011
quotequote all
Zaxxon said:
I don't notice them with my 100-400.

Great so does this mean that my new 550d is shagged as well?
It's not your day, is it?

I just posted that because I had not heard that adjective used for about 15 years, and as I type I am laughing, and it has made my day so far.

smile

Good luck with a fix though.

jimmy156

3,834 posts

216 months

Tuesday 8th March 2011
quotequote all
Zaxxon said:
Are my expectations too high for this kit? I cannot believe that I am having these issues with a £650 body and £700 lens.

If I had this happen on my £200 limix point and shoot I would send it back to the vendor and ask for my money back.
hot pixels will occur on any digital camera, i had some on my 50d around a year after i bought it. Turn the camera so the lens is pointing downwards and go into the menu and find the option to manually clean the sensor with the mirror flipped up. You will hear the mirror move and just leave it for a minute before returning it to normal. Simply doing this willshould fix your issue, it did for me. I have no idea how it works mind you, i assume its something to do with completely de-charging the sensor.

ETA: Just to make it clear, you dont need to clean the sensor or even take the lens off, just select the option to do this in the camera menu and leave for a minute or so.

Simpo Two

92,730 posts

294 months

Tuesday 8th March 2011
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Dust on the sensor as well eh?

RobDickinson

31,343 posts

283 months

Tuesday 8th March 2011
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Dust on the lens wont be visible (unless tour at f22+ on a UWA).

It will impact contrast a touch.

Honestly its not an issue.

Zaxxon

Original Poster:

4,057 posts

189 months

Wednesday 9th March 2011
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Well thats first class service from Canon. I tried the hot pixel clearing method 3 times but without success.

I contacted Canon and they said to send the lens and body back with copies of purchase details to prove warranty.

They have a 5-6 day turn around on fixes so i won't be without the camera for long.

Thanks for the advice.

Hope it all works out.

bob parr

182 posts

221 months

Thursday 17th March 2011
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Have you got a filter on it? That can cause dust to be sucked in

Zaxxon

Original Poster:

4,057 posts

189 months

Thursday 14th April 2011
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Everything was repaired by Canon, excellent service. Fast turn around and I was very happy with everything.

However I have just returned from a trip to Ypres and the Somme and whilst cleaning the lens, I note that there is even more specks of dust than the first time.

The lens has been changed on the camera 4 times and I have used it for a couple of test shots and then 4 days around the various locations.

I'm really unhappy with this, this must be a duff lens. The reviews are brilliant, so I must be unlucky. It does have a clear UV filter on it for protection. I have been very carefull since it came back regarding keeping it 'sterile'.

I do use the lens for night shots and F22 etc so it is an issue.

I'm now considering getting it repaired again then selling it.
I'll go for a 50mm 1.4 and a Sigma 10-20 with the money as I seem to take a lot of landscape images and don't mind moving around to get everything in the frame.

Has anyone else had issues along these lines?

jr502

487 posts

203 months

Thursday 14th April 2011
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Zaxxon said:
I do use the lens for night shots and F22 etc so it is an issue.
What's the reason for f22 at night?

don4l

10,058 posts

205 months

Thursday 14th April 2011
quotequote all
What format are you taking the photos in?

If you use JPG, then the camera should process the hot pixels before it saves the image. However, if you are using "RAW" mode, then you will have the hot pixels in your images.


Could you post up an image so that we can have a look? If you do, then crop a portion of the image and post it at full size. It should be easy to tell if the problem is indeed hot pixels.

Don
--

Zaxxon

Original Poster:

4,057 posts

189 months

Thursday 14th April 2011
quotequote all
jr502 said:
What's the reason for f22 at night?
No, sorry, not F22 at night, but I do night shots and also some F22 (and other high F numbers) at other times.



Zaxxon

Original Poster:

4,057 posts

189 months

Thursday 14th April 2011
quotequote all
don4l said:
What format are you taking the photos in?

If you use JPG, then the camera should process the hot pixels before it saves the image. However, if you are using "RAW" mode, then you will have the hot pixels in your images.


Could you post up an image so that we can have a look? If you do, then crop a portion of the image and post it at full size. It should be easy to tell if the problem is indeed hot pixels.

Don
--
The Hot Pixels are all sorted out, the sensor was fixed by Canon and the body seems to be A1. I shoot RAW.

It's the lens that is now the problem, it seems to be made by Dyson.

jr502

487 posts

203 months

Thursday 14th April 2011
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Ah, stupid me!