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Forums > Photography Talk > OK, which is the Full-Sized Sensor? Search   Reply
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Photographer
Robert Jewett
Posts: 2,419
al-Marsā, Tunis, Tunisia


Just for fun...
Specs:
One 7D.
One 5DMarkIII.
24-70L at 60mm for both.
ISO 400, F2.8, 100/sec on both.
Processed in LR.

Mark III cropped to the same perspective/magnification as 7D.

Vote for which is the full framed image in responses.

"A":
http://farm9.staticflickr.com/8061/8181595150_9a763e6be9_o.jpg

"B":
http://farm9.staticflickr.com/8200/8181594994_80a8b1131e_o.jpg

[EDIT] I made an effort to match tonality, contrast, brightness, etc. with very slight adjustments in LR.  As a point of interest, if you drop the blacks on the Mark III, the color/contrast looks pretty close to the 7D.  The slight brightness differences, were there in the originals (but I did bump up the exposure a bit on both).  Also, next time, I'll also crop in camera to show the difference.
Nov 13 12 01:07 am  Link  Quote 
Photographer
Sonoma Coast Photograph
Posts: 635
Sebastopol, California, US


I'll vote for B to be the full-frame image.
Nov 13 12 02:04 am  Link  Quote 
Photographer
Valent Lau
Posts: 130
Sydney, New South Wales, Australia


"cropped to the same perspective/magnification" and shrunk to web size, so they should be identical?

B looks a bit brighter tho.
Nov 13 12 02:14 am  Link  Quote 
Photographer
Raoul Isidro Images
Posts: 5,590
Sydney, New South Wales, Australia


A=5D3

B=7D

Full Frame has greater DOF than cropped, using the same lens and set up.

.
Nov 13 12 02:18 am  Link  Quote 
Photographer
hs photography
Posts: 468
Houston, Texas, US


A is full frame.  I'm glad you did this.
Nov 13 12 02:21 am  Link  Quote 
Photographer
Drew Smith Photography
Posts: 5,118
Nottingham, England, United Kingdom


What I do notice is the huge difference in colour and contrast.

A is more 'colourful' and is much more 'contrasty' compared to B.
Nov 13 12 02:33 am  Link  Quote 
Photographer
Josh Yu Photography
Posts: 206
Melbourne, Victoria, Australia


Raoul Isidro Images wrote:
A=5D3

B=7D

Full Frame has greater DOF than cropped, using the same lens and set up.

.

But he said the FF shot is cropped so DOF should be the same!

Nov 13 12 02:40 am  Link  Quote 
Photographer
Robert Jewett
Posts: 2,419
al-Marsā, Tunis, Tunisia


Drew Smith Photography wrote:
What I do notice is the huge difference in colour and contrast.

A is more 'colourful' and is much more 'contrasty' compared to B.

Well, that could be my fault.  I adjusted one to match the other to really show the depth of field, etc. without the giveaway of the color/contrast/saturation between the two sensors.

Nov 13 12 02:43 am  Link  Quote 
Photographer
j3_photo
Posts: 19,849
Las Vegas, Nevada, US


I'm saying B is Full Frame
Nov 13 12 02:53 am  Link  Quote 
Photographer
WMcK
Posts: 5,203
Glasgow, Scotland, United Kingdom


A full frame cropped to the same size as a "crop" sensor then resampled to the same size will give identical results as far as DOF etc. are concerned. Contrast and saturation differences are consequences of processing. It should not be possible to tell the difference.
Nov 13 12 02:59 am  Link  Quote 
Photographer
SPV Photo
Posts: 741
San Diego, California, US


j3_photo wrote:
I'm saying B is Full Frame

Yup.

Nov 13 12 02:59 am  Link  Quote 
Photographer
Fine Art Exposures
Posts: 31
Ottawa, Ontario, Canada


I would say A is the 7D
and B is the 5D mark iii
Nov 13 12 05:19 am  Link  Quote 
Photographer
Robert Jewett
Posts: 2,419
al-Marsā, Tunis, Tunisia


So far, the votes are:

"A" has 2,
"B" has 4,

for full frame.

Kinda had to put it down, 'cause some votes is a changin'. wink
Nov 13 12 05:24 am  Link  Quote 
Photographer
SPierce Photography
Posts: 19,360
Amherst, Massachusetts, US


off hand guess upon initial view: b is full frame, a is crop body.

i'm probably wrong, but hey why not tongue wink
Nov 13 12 06:32 am  Link  Quote 
Photographer
Bill Sylvester
Posts: 1,463
Cincinnati, Ohio, US


B
Nov 13 12 06:36 am  Link  Quote 
Photographer
Neil Snape
Posts: 9,424
Paris, Île-de-France, France


In PS I'd see a bigger difference than on a web browser. A has some contouring around transitions so that is unusual for a 5D. Thus I'd say A is the 7D, B is the 5D
Nov 13 12 06:38 am  Link  Quote 
Photographer
JSVeselka
Posts: 42
Holland, Ohio, US


I have B as full frame.
Nov 13 12 06:43 am  Link  Quote 
Photographer
Robert Jewett
Posts: 2,419
al-Marsā, Tunis, Tunisia


OK up to:

A=2
B=8 votes.
Nov 13 12 06:49 am  Link  Quote 
Photographer
DennisRoliffPhotography
Posts: 1,915
Akron, Ohio, US


Raoul Isidro Images wrote:
A=5D3

B=7D

Full Frame has greater DOF than cropped, using the same lens and set up.

.

DOF is either shallow or deep, not greater or lesser. http://www.freesmileys.org/smileys/smiley-basic/wink.gif

Nov 13 12 06:58 am  Link  Quote 
Photographer
Edge2Edge Photo
Posts: 23
Charlotte, North Carolina, US


I vote B.
Nov 13 12 07:03 am  Link  Quote 
Photographer
Ryan Richardson Photo
Posts: 76
MIDDLEBORO, Massachusetts, US


Josh Yu Photography wrote:

But he said the FF shot is cropped so DOF should be the same!

The image is cropped in post, it shouldn't have any bearing on the depth of field

Nov 13 12 08:17 am  Link  Quote 
Photographer
S W I N S K E Y
Posts: 24,310
Saint Petersburg, Florida, US


everything looks good on a computer screen at low res

http://i.imgur.com/m8TQi.png
Nov 13 12 08:22 am  Link  Quote 
Photographer
L A U B E N H E I M E R
Posts: 8,233
Seattle, Washington, US


isn't sensor quality more important than sensor size?
Nov 13 12 08:24 am  Link  Quote 
Photographer
Sungoddess Studios
Posts: 5,169
Toms River, New Jersey, US


the 5d is obviously the full frame sensor and yes only pixel peepers can tell the difference so when magazines finally realize that we can submit 500dpi+ photos to them.... No there is no difference at all.
www.SungoddessStudios.com
Nov 13 12 08:26 am  Link  Quote 
Photographer
Extrosy
Posts: 656
Minneapolis, Minnesota, US


Repeat the test at ISO 6400
Nov 13 12 08:28 am  Link  Quote 
Photographer
Arstine
Posts: 42
Rapid City, South Dakota, US


B = full frame
Nov 13 12 08:33 am  Link  Quote 
Photographer
Erik Ballew
Posts: 689
Westminster, Colorado, US


I say B, just cause the way the chairs look in the back.
Nov 13 12 08:40 am  Link  Quote 
Photographer
J O H N A L L A N
Posts: 9,518
Santa Ana, California, US


I think B is the full frame.
Nov 13 12 08:51 am  Link  Quote 
Photographer
Leonard Gee Photography
Posts: 15,728
Sacramento, California, US


for identical distance and identical aperture,  there is no difference in dof. however, the magnification of the image is different.

look at the edge blur of the two images. the first, sample a, has smoother and smaller blur - that's the large sensor with less enlargement. sample b has rough, larger blur diameter, the result of enlarging the compressed pixels. look at the difference in the headlights blur of the toy truck.

larger format always means smoother tones. enlargement was always the killer for small format quality.
Nov 13 12 08:53 am  Link  Quote 
Photographer
Fine Art Exposures
Posts: 31
Ottawa, Ontario, Canada


I am now starting to doubt my answer.

I find the DOF a tad bit deeper in image A.

I assumed the cropped sensor provided a deeper DOF based on the relationship of the smaller sensor for a given F stop,  and the full frame sensor provided a shallower DOF for the same F stop.

For kicks I used a Depth of Field calculator at 60mm, f2.8 at a subject distance of 6 feet.

Total depth for the 7D would be 4 inches.
Total depth for the 5D would be 6 inches.

So now I am indeed intrigued as to the answer.  Any timeframe when you plan on revealing it?
Nov 13 12 08:59 am  Link  Quote 
Photographer
Image Magik
Posts: 1,067
New Orleans, Louisiana, US


Robert Jewett wrote:
Just for fun...
Specs:
One 7D.
One 5DMarkIII.
24-70L at 60mm for both.
ISO 400, F2.8, 100/sec on both.
Processed in LR.

Mark III cropped to the same perspective/magnification as 7D.

Vote for which is the full framed image in responses.

"A":
http://farm9.staticflickr.com/8061/8181595150_9a763e6be9_o.jpg

"B":
http://farm9.staticflickr.com/8200/8181594994_80a8b1131e_o.jpg

[EDIT] I made an effort to match tonality, contrast, brightness, etc. with very slight adjustments in LR.  As a point of interest, if you drop the blacks on the Mark III, the color/contrast looks pretty close to the 7D.  The slight brightness differences, were there in the originals (but I did bump up the exposure a bit on both).  Also, next time, I'll also crop in camera to show the difference.

I don't think that's really a fair assessment since you are basically evening out the playing field for the two cameras. You should Asmile not make any changes to either photo and Bsmile move the 5D in or the 7D out to match the crop not crop the 5D to match the crop sensor camera!

You crippled one camera to make it lame like the other.

Nov 13 12 09:03 am  Link  Quote 
Photographer
Robert Jewett
Posts: 2,419
al-Marsā, Tunis, Tunisia


Image Magik wrote:

You crippled one camera to make it lame like the other.

You must have missed the thread(s) this week where people were saying they could ALWAYS tell, even if it's cropped. wink

Score stands at A=3, B=11.

Nov 13 12 09:18 am  Link  Quote 
Photographer
Image Magik
Posts: 1,067
New Orleans, Louisiana, US


Robert Jewett wrote:

You must have missed the thread(s) this week where people were saying they could ALWAYS tell, even if it's cropped. wink

Score stands at A=3, B=11.

Well you didn't mention that in your post:-)

Nov 13 12 09:21 am  Link  Quote 
Photographer
PicBack
Posts: 615
New York, New York, US


Another voter for B being the FF photo.
Nov 13 12 09:21 am  Link  Quote 
Photographer
Robert Jewett
Posts: 2,419
al-Marsā, Tunis, Tunisia


Image Magik wrote:

Well you didn't mention that in your post:-)

smile

But... you can kinda see my point, right?

BTW, I'll reveal at 20 total votes.

Nov 13 12 09:31 am  Link  Quote 
Photographer
Yingwah Productions
Posts: 1,334
New York, New York, US


This would be an epic http://lh5.googleusercontent.com/-iw5TaUpM1OI/AAAAAAAAAAI/AAAAAAAAABg/oWjr6XtVW8o/s120-c/photo.jpg if both were shot with the same camera lol
I'll guess B for fullframe just for the slightly better tonal range. But crop sensor should be slightly sharper, which B is also. tough call.
You should load the same camera profile on both cameras and show the out of camera results just to see, but this is a good test.

vote B for fullframe
Nov 13 12 09:32 am  Link  Quote 
Photographer
Robert Jewett
Posts: 2,419
al-Marsā, Tunis, Tunisia


Yingwah Productions wrote:
This would be an epic http://lh5.googleusercontent.com/-iw5TaUpM1OI/AAAAAAAAAAI/AAAAAAAAABg/oWjr6XtVW8o/s120-c/photo.jpg if both were shot with the same camera lol
I'll guess B for fullframe just for the slightly better tonal range. But crop sensor should be slightly sharper, which B is also. tough call.
You should load the same camera profile on both cameras and show the out of camera results just to see, but this is a good test.

vote B for fullframe

I was so tempted to do that...but I figured someone would really not think it funny. LOL.

A=3
B=13
16 total votes, reveal at 20.

Nov 13 12 09:33 am  Link  Quote 
Photographer
Tom Nguyen Studio
Posts: 404
Shakopee, Minnesota, US


I'll play:

"B" is full frame
Nov 13 12 09:41 am  Link  Quote 
Photographer
Gabby57
Posts: 346
Coppell, Texas, US


"A"
Nov 13 12 09:43 am  Link  Quote 
Photographer
Lovely Day Media
Posts: 3,405
Vineland, New Jersey, US


I think A is the full frame.
Nov 13 12 09:48 am  Link  Quote 
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