The New T3i - Will digital zoom allow normal shooting without Aliasing and Moire. - Page 2 at DVinfo.net

Go Back   DV Info Net > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon EOS Crop Sensor for HD

Canon EOS Crop Sensor for HD
APS-C sensor cameras including the 80D, 70D, 7D Mk. II, 7D, EOS M and Rebel models for HD video recording.


Reply
 
Thread Tools Search this Thread
Old March 6th, 2011, 03:23 AM   #16
Trustee
 
Join Date: May 2010
Location: England liverpool
Posts: 1,312
Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir

Quote:
Originally Posted by Joel Peregrine View Post
Thanks for the test Lawrence!

What do you think the flickering is at the bottom?
The flickering usually happens when you have filmed it from another source??? computor or?
Steve Bleasdale is offline   Reply With Quote
Old March 6th, 2011, 04:35 PM   #17
Major Player
 
Join Date: Jul 2008
Location: Maryland, USA
Posts: 220
Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir

Alright, I was able to do some tests with the T3i in daylight with my 100-400mm and my 18-135mm. Everything was ISO 100 except for the last scene of the pine tree.

One shot particularly seems to demonstrate the mitigation of aliasing and moire with the 3x zoom turned on. However, noise levels appear to be slightly increased, or at least appear so.

Overall, I am very, very pleased with the performance of this zoom feature when left at the 3x setting. The shots appear nearly indistinguishable from normal shots. I'm not a legit pixel peeper, but upon first pass, I feel like I now have a 3x teleconverter with no light loss.

YouTube - T3i - Zoom Test Comparisons
Ryan Farnes is offline   Reply With Quote
Old March 6th, 2011, 04:50 PM   #18
Major Player
 
Join Date: Jul 2008
Location: Maryland, USA
Posts: 220
Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir

I just uploaded to Vimeo. Will display in standard definition, but you should be able to download the 1080p original file.

Ryan Farnes is offline   Reply With Quote
Old March 6th, 2011, 05:54 PM   #19
Major Player
 
Join Date: Jul 2008
Location: Maryland, USA
Posts: 220
Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir

The more I look at the samples, the more I think I would admit that the 3x zoom feature is noticeably softer. However, it is still a viable image. It simply doesn't appear to resolve as much detail as normal. These tests are pretty unscientific though.

Still, download the video from Vimeo and see for yourself. I know I will definitely still use this feature.
Ryan Farnes is offline   Reply With Quote
Old March 6th, 2011, 06:17 PM   #20
Inner Circle
 
Join Date: Nov 2005
Location: Elk Grove CA
Posts: 6,838
Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir

Ryan:

Thanks so much for taking the time to do that. I will do a bit more exploration with the footage.

Chris
__________________
Chris J. Barcellos
Chris Barcellos is offline   Reply With Quote
Old March 6th, 2011, 06:19 PM   #21
Major Player
 
Join Date: Jan 2006
Location: Gothenburg, Sweden
Posts: 259
Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir

really cool of you to share, thanks
Chris Westerstrom is offline   Reply With Quote
Old March 6th, 2011, 06:35 PM   #22
Major Player
 
Join Date: Jun 2006
Location: Boston, MA
Posts: 338
Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir

great info Chris, thanks for sharing.

So on the T3i you just push the magnifying button to get the 3X zoom ?
Michael Ojjeh is offline   Reply With Quote
Old March 6th, 2011, 06:55 PM   #23
Inner Circle
 
Join Date: Nov 2005
Location: Elk Grove CA
Posts: 6,838
Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir

I downloaded Ryan's footage, and did some playing with the last scene. It is hard to tell because of the different angle of views, but I feel like the details are resolving a bit better in the 3x zoom, because of less line skipping.

However, the real way to test it is to shoot that same scene or a similar one with the lens in wide mode, at 3x, then the zoom lens set at 55mm in normal mode. In that way the field fo view should be pretty close, and which mode resolves detail better should be pretty evident.
__________________
Chris J. Barcellos
Chris Barcellos is offline   Reply With Quote
Old March 6th, 2011, 06:55 PM   #24
Major Player
 
Join Date: Jul 2008
Location: Maryland, USA
Posts: 220
Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir

You pull up the "Quick Menu" and under the option to change the frame rate and size (720 60fps, 1080 24fps, etc...) there is an option to switch into 3-10x zoom mode. When activated, it defaults to 3x zoom, and then by pressing a button with the zoom buttons (same as T2i/7D) it zooms in and out at a constant rate.

I'll never use more than the 3x zoom for any serious shots.

But anyways, hopefully the footage gives a glimpse. Chris, I'm definitely interested to do more tests to try out your recommendation to not move the camera and compare the 3x zoom on a wide focal length with the actual equivalent focal length with no zoom.

Overall, I'm very satisfied with the T3i, even with the price bump from a T2i. Articulating screen, manual audio, 3x zoom. Its a pretty swell camera.
Ryan Farnes is offline   Reply With Quote
Old March 6th, 2011, 07:12 PM   #25
Inner Circle
 
Join Date: Nov 2005
Location: Elk Grove CA
Posts: 6,838
Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir

Thanks Ryan, look forward to it. (I am getting that nervous stomach feeling. A BestBuy is two blocks from my house.)
__________________
Chris J. Barcellos
Chris Barcellos is offline   Reply With Quote
Old March 6th, 2011, 09:17 PM   #26
Regular Crew
 
Join Date: Feb 2010
Location: Kyoto, Japan
Posts: 139
Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir

Quote:
Originally Posted by Joel Peregrine View Post
Thanks for the test Lawrence!

What do you think the flickering is at the bottom?
I am not really sure, I need to check the original footage and see if it is from Vimeo or the original file.
I used my 4GB FAT16 Class 6 SD card which I had in my S95 so it may have been something to do with the card.

Quote:
Originally Posted by Chris Barcellos View Post
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) ????
Nicely spotted! Yes, that is exactly right.
__________________
SONY α77 :: Panasonic X900M :: Sony DSR-PD170P :: Miller DS5 :: Premiere Pro 2.0 :: Cineform NeoScene
Laurence Janus is offline   Reply With Quote
Old March 7th, 2011, 06:27 AM   #27
Trustee
 
Join Date: Sep 2006
Location: Kent UK
Posts: 1,397
Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir

Interesting tests Ryan. I think the x3 material looks great. I'm going to head down to the camera shop today and check one out in the flesh. I'll take a card and try a few tests myself.
Mat Thompson is offline   Reply With Quote
Old March 7th, 2011, 11:02 AM   #28
Major Player
 
Join Date: Jul 2008
Location: Maryland, USA
Posts: 220
Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir

Good deal Mat. I know you did that piece, Hudson's Monarch. Are you thinking of using the 3x feature for macro cinematography?

I know that Emm at Cheesycam.com thought that was an excellent use for it.
T3i 3x Zoom w/ 100mm F/2.8L IS Macro CheesyCam
Ryan Farnes is offline   Reply With Quote
Old March 7th, 2011, 03:13 PM   #29
Trustee
 
Join Date: Aug 2006
Location: London UK
Posts: 1,939
Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir

Very useful tests Ryan. Thanks

Been playing with it myself. Don't think it works as well as the GH2 crop but it's nice to have. Agreed stick to 3x. The rest is pointless!
__________________
Philip Bloom
Cinematographer, Director, Filmmaker www.philipbloom.net
Phil Bloom is offline   Reply With Quote
Old March 7th, 2011, 03:29 PM   #30
Inner Circle
 
Join Date: Nov 2005
Location: Elk Grove CA
Posts: 6,838
Re: The New T3i - Will digital zoom allow normal shooting without Aliasing and Moir

Hey Phil:

Are you saying you have been comparing T3i in 3x mode and regular GH2 footage of the same seen at similar angles of view ? If so, are you saying you can't get as good resolution as the GH2 ?
__________________
Chris J. Barcellos
Chris Barcellos is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon EOS Crop Sensor for HD

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 07:26 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network