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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 19 Jun 2012 (Tuesday) 21:57
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Official T4i Thread

 
milcs
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Dec 07, 2012 09:00 |  #601

davidc502 wrote in post #15337379 (external link)
Were you using the same lens to test shoot the replacement 650D? Did you take a bunch of shots?

Took lots of shots, swapped lenses between both cameras... General impression I got was that the replacement camera was much less sharper. Even my wife agreed... And she is really impartial (in fact she thinks I am crazy with this issue!).




  
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Shake ­ N ­ Vac
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Dec 07, 2012 09:07 |  #602

This dust spot discussion appeals to my OCD and I will be trying the white paper thing myself I think.


Canon 6D / Canon 70-200 IS ii / Sigma 100 Macro f2.8 / 50mm f1.8
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milcs
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Dec 07, 2012 10:06 |  #603

Shake N Vac wrote in post #15337446 (external link)
This dust spot discussion appeals to my OCD and I will be trying the white paper thing myself I think.

What you should try is put on a zoom lens, set it to its telescopic end, go into AV mode and select the higher f value possible (also, make sure you select ISO 100). Then open a word document (or any other white document) and take a picture of the screen (make sure you get only screen) setting focus to infinite.
Take the photo, go into photoshop and auto level (or auto tone)! I am sure you will see spots...

BUT... This doesn't mean that this actually influences your photos at all. In fact, if you increase aperture to something around f8, the spots become very fuzzy and many smaller spots disappear.

It would actually be nice to have a bit of info from other owners of the 650D regarding this issue (which, I would be careful enough to say... it is not really a "issue").




  
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EssPee2u
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Dec 07, 2012 20:34 as a reply to  @ milcs's post |  #604

Greetings All...Xmas came early as my Wife bought me a T4i w/18-135 STM...this is my first DSLR and yes I already am looking at the Pancake 40mm STM...I've got a lot of learning to do before our vacations this summer and looking forward to learning from you all...Happy Shooting


650D - 18~135mm IS STM - 40mm STM - 55~250mm IS - 10-18mm STM - Yongnuo YN-565 EX TTL - SX260 HS
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speedync
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Dec 07, 2012 20:43 |  #605

milcs wrote in post #15337284 (external link)
Well... The thing is, Amazon did send me a camera to replace my 650D. But the quality of the photos from the replacement camera was considerably worst than my original camera (to my naive eye, they were less focused and less sharp).

Are you shooting Raw or jpeg? Are ALL the camera settings EXACTLY the same between the cameras? Things like the in camera sharpness, and contrast settings. Picture style the same? Are you using single point focus, or do you have all the focus points turned on. All these things will make a difference to the final image.
Just clean the sensor and move on. My T2i is nearly a couple of years old, taken more than 10,000 shots, and if I stop it down to f/20 or 22 I can also see dust/oil spots. Haven't bother to clean it once though, because in normal use, I never stop down below about f/10. No need to stop down further in my useage.




  
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JasonMK
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Dec 07, 2012 21:57 |  #606

Does anyone have any photos to share? I have to wait until Christmas to use mine, but sounds like Santa came early for many of you. Let's see some pictures!


-JasonMK on Flickr (external link)
1Ds Mark III | 650D | EF 17~40mm 4L | EF-S 18~135 STM | EF 50mm 1.4 | EF 100mm 2.8 USM Macro | Tamron 70~300mm 4.0-5.6 Di VC USD XLD | 430 EX III | 430 EX II | Lowepro SlingShot 100 AW | EF 25 II | PS CC | LR CC

  
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KT29
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Dec 07, 2012 22:15 as a reply to  @ JasonMK's post |  #607

I do believe if you look at the pages in this thread, you will find some pics.:)


Terry -- The Squeaky wheel gets the grease, but sometimes it's just better
to Replace it.

  
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patrick ­ j
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Dec 07, 2012 23:47 |  #608

JasonMK wrote in post #15340146 (external link)
Does anyone have any photos to share? I have to wait until Christmas to use mine, but sounds like Santa came early for many of you. Let's see some pictures!

Haven't taken that many photos yet, but here is something. Cropped a bit and resolution reduced before uploading but reasonably sharp.

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR

Flickr (external link)

  
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JasonMK
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Dec 08, 2012 06:41 |  #609

patrick j wrote in post #15340376 (external link)
IMAGE NOT FOUND
HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR

Now we are talking, and what a great shot!


-JasonMK on Flickr (external link)
1Ds Mark III | 650D | EF 17~40mm 4L | EF-S 18~135 STM | EF 50mm 1.4 | EF 100mm 2.8 USM Macro | Tamron 70~300mm 4.0-5.6 Di VC USD XLD | 430 EX III | 430 EX II | Lowepro SlingShot 100 AW | EF 25 II | PS CC | LR CC

  
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patrick ­ j
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Dec 08, 2012 08:26 |  #610

JasonMK wrote in post #15340931 (external link)
Now we are talking, and what a great shot!

Thanks. If you look in the sky on both sides of that peak, you can see a bit of what I think they call banding, but don't worry, it only appeared after I reduced the resolution, not there in the original photo.


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JasonMK
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Dec 08, 2012 11:54 |  #611

patrick j wrote in post #15341137 (external link)
Thanks. If you look in the sky on both sides of that peak, you can see a bit of what I think they call banding, but don't worry, it only appeared after I reduced the resolution, not there in the original photo.

I love the way it almost looks like a black and white photo, without that tree in the foreground I would have assumed you converted it to B&W.


-JasonMK on Flickr (external link)
1Ds Mark III | 650D | EF 17~40mm 4L | EF-S 18~135 STM | EF 50mm 1.4 | EF 100mm 2.8 USM Macro | Tamron 70~300mm 4.0-5.6 Di VC USD XLD | 430 EX III | 430 EX II | Lowepro SlingShot 100 AW | EF 25 II | PS CC | LR CC

  
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swhiggins
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Dec 08, 2012 15:16 |  #612

patrick j wrote in post #15340376 (external link)
Haven't taken that many photos yet, but here is something. Cropped a bit and resolution reduced before uploading but reasonably sharp.

That is a great shot, at first I thought it was selective color...


~Steve~ | 60D | S95 | 10-22 | 15-85 | 55-250 | 60 | 50/1.8 I

  
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nfletcher2
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Dec 08, 2012 23:55 |  #613

Which kit?

I am thinking of buying the T4i for a beginner camera. I have always been interested in photography and think I would love to dig in. So here is my delima,

Amazon has the kit with the T4i and 18-135mm EF-S IS STM Lens for $899 with free 16GB SD card and backpack.

Or...

Amazon has the kit with the T4i and 18-55mm EF-S IS II Lens and I can get $150 off the Canon EF-S 55-250mm f/4-5.6 IS II along with the free SD card and backpack for a total of $818.70

Should I get the single package with the STM lens for $899 or get the other one. Is the STM lens that much better? Any advice is much appreciated!


Canon 650D | EF-S 18-135mm STM | EF 70-300mm f/4-5.6 IS USM | EF 100mm 2.8 USM Macro | EF 50mm f/1.8 II | 430 EX II | Black Rapid RS-7 | Manfrotto 190XPROB w/ 327RC2 head

  
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RafaPolit
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Dec 09, 2012 03:53 |  #614

@milcs,

The specs are, without any doubt, sensor dust. If you have sensor cleaning on, every time you turn the camera on and off, they will, more likely than not, start cleaning themselves. Anyways, access the sensor cleaning function a couple of times manually to force more 'shakes', and they will be OK.

The worst cases are those ultra blue skies that get the dusts clearer in view... for most pictures you won't notice them at all.

Now, as for the variances in cameras: the sensor is NOT to blame, at all... every model camera has the same sensor and variation among them is not relevant. What IS relevant is the positioning of the sensor and possible miss-alignments. Lenses suffer from this as well... so, your first camera (which probably has some problems with sensor alignment as do all cameras!) is a much better MATCH to your first lens (which alignment problems could actually offset your camera ones, making them a perfect couple! :) ) than your second camera is to your second lens, in which case the issues of one appear to accentuate the issues of the second.

So, say your first camera's sensor is 5 microns too forward, but your lens has the focus convergence point 5 microns forward to the zeroed specs... then your lens is perfectly focusing on the sensor plane. Imagine your second camera has the exact same variations, but one of them in the other direction: the sensor is 5 microns too backward, and the lens has the same 5 microns forward focusing... now you have 10 microns of missaligned images!!!

So, yes, for sure, keep the first camera (at the discounted price!), use it a couple of weeks, retest for dust specs (with the procedure you did). If they are the same, you need to clean the sensor (very carefully! special care with not blowing additional dust or worse grease or other substances into the sensor!!!). If they are reducing in quantity, just keep selecting the sensor cleaning option a couple of times in each shooting session and allow it to clean the camera when on or off as often as possible.

Keep particular care in not changing lenses in dusty scenarios, and don't use mirror lock up features or change lenses with the shutter open.

Hope this helps calm you down a bit :) , best regards,
Rafa.


Rebel T2i | EF-S 17-55 IS | EF 70-200 f4L | EF-S 10-22 | 430EX II |
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JasonMK
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Dec 09, 2012 07:59 |  #615

nfletcher2 wrote in post #15343697 (external link)
I am thinking of buying the T4i for a beginner camera. I have always been interested in photography and think I would love to dig in. So here is my delima,

Amazon has the kit with the T4i and 18-135mm EF-S IS STM Lens for $899 with free 16GB SD card and backpack.

Or...

Amazon has the kit with the T4i and 18-55mm EF-S IS II Lens and I can get $150 off the Canon EF-S 55-250mm f/4-5.6 IS II along with the free SD card and backpack for a total of $818.70

Should I get the single package with the STM lens for $899 or get the other one. Is the STM lens that much better? Any advice is much appreciated!

I'd go with option one, but you can also get the $150 off the 55-250mm with it if your budget allows.


-JasonMK on Flickr (external link)
1Ds Mark III | 650D | EF 17~40mm 4L | EF-S 18~135 STM | EF 50mm 1.4 | EF 100mm 2.8 USM Macro | Tamron 70~300mm 4.0-5.6 Di VC USD XLD | 430 EX III | 430 EX II | Lowepro SlingShot 100 AW | EF 25 II | PS CC | LR CC

  
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Official T4i Thread
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