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March 1st, 2011, 08:07 PM
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#1 |
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Inner Circle
Join Date: Nov 2005
Location: Elk Grove CA
Posts: 6,838
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The New T3i - Will digital zoom allow normal shooting without Aliasing and Moire.
The first one out there to get a T3i, I would like to see something tested.
Its my theory that if I stick a very wide lens on the camera, even shoot the wide end of the 18-55 off the T2i, and then shoot I shoot at 3 x digital zoom, I should have a better image that the same shot say without digital zoom and at 55mm setting on the zoom. It would makes sense that in the crop for that digital zoom, there should be less line skipping ?? Whose got one already ?
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Chris J. Barcellos |
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March 1st, 2011, 09:55 PM
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#2 |
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Major Player
Join Date: Jul 2008
Location: Maryland, USA
Posts: 220
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Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir
Mine arrives tomorrow. The results I've seen from 1 test are encouraging. I will know more tomorrow night.
http://cheesycam.com/testing-3x-w-100mm-f2-8l-is-macro/ As far as I understand it, the 3x setting in the zoom feature of the camera should result in a sensor crop where close to 1920x1080 pixels are used from the center of the sensor, resulting in a relatively robust image. As you zoom in towards 10x, the image will degrade in the traditional digital zoom sense. |
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March 2nd, 2011, 12:41 AM
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#3 |
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Inner Circle
Join Date: Nov 2005
Location: Elk Grove CA
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Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir
Cool, Ryan, keep us posted.
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Chris J. Barcellos |
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March 2nd, 2011, 09:55 AM
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#4 |
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Major Player
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Location: Maryland, USA
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Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir
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March 2nd, 2011, 10:45 AM
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#5 |
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Trustee
Join Date: May 2010
Location: England liverpool
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Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir
That was good bloody good
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March 2nd, 2011, 04:50 PM
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#6 |
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Major Player
Join Date: Jan 2006
Location: Gothenburg, Sweden
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Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir
very interesting
do you lose any stops of light along the way? |
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March 2nd, 2011, 07:44 PM
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#7 |
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Major Player
Join Date: Jul 2008
Location: Maryland, USA
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Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir
First test shot will be up within the hour.
No, no light loss. Just cropping the sensor. Its like how the T3i/T2i/7D sensors are smaller than the 5D sensor, so you get a 1.6x crop factor. Now the "crop" factor is another 3x. Now, the tech behind how this works is not clear, and certainly, there aren't even enough pixels to crop the central 1920x1080 to get 3x, you'd have to go down to 1728px across. Still, its obviously that some sort of crop is occurring to provide this feature. As you zoom in beyond 3x though, you're entering no man's land where pixels are made up, resulting in a poor image. |
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March 2nd, 2011, 08:42 PM
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#8 |
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Major Player
Join Date: Jul 2008
Location: Maryland, USA
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Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir
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March 2nd, 2011, 08:50 PM
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#9 |
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Major Player
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Location: Maryland, USA
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Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir
You can download the original exported file before web compression at Vimeo.
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March 3rd, 2011, 01:40 AM
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#10 |
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Inner Circle
Join Date: Nov 2005
Location: Elk Grove CA
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Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir
Thanks Ryan. Hope to see some daylight 100 ISO long distance shots.
Also would like to see a 3x of your widest lens.
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Chris J. Barcellos |
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March 3rd, 2011, 02:09 AM
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#11 |
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Regular Crew
Join Date: Mar 2008
Location: Chania Crete Greece
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Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir
And please, a comparison of the same FOV with and without the 3Xzoom i.e frame the shot, shoot, dial in 3X zoom, move backwards to get the same frame, shoot, repeat for 5X zoom, repeat for 10X zoom (last two steps not really nescecary).
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March 3rd, 2011, 08:08 AM
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#12 |
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Major Player
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Location: Maryland, USA
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Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir
I will try to do that. Unfortunately, I work an hour from home and its dark by the time I get in. I can probably get to it Saturday. In the meantime, I expect to see more and more samples popping up all over.
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March 4th, 2011, 10:12 AM
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#13 |
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Regular Crew
Join Date: Feb 2010
Location: Kyoto, Japan
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Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir
I did a little test today to check for aliasing
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March 5th, 2011, 10:45 PM
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#14 |
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Major Player
Join Date: Oct 2002
Location: Wisconsin
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Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir
Thanks for the test Lawrence!
What do you think the flickering is at the bottom?
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March 5th, 2011, 11:17 PM
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#15 |
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Inner Circle
Join Date: Nov 2005
Location: Elk Grove CA
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Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir
Yes, quite interesting demonstration Laurence.
Okay, can you orient us as to what was going on. On the opening shot, was that 10x digital, with the physical zoom set at wide ? ? And then 3x digital with the physical zoom at wide (18mm) ????
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Chris J. Barcellos |
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