Forums > Photography Talk > OK, which is the Full-Sized Sensor?

Photographer

Robert Jewett

Posts: 2462

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

Photographer

Sonoma Coast Photograph

Posts: 664

Sebastopol, California, US

I'll vote for B to be the full-frame image.

Nov 13 12 02:04 am Link

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

Photographer

Raoul Isidro Images

Posts: 6289

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

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

Photographer

Drew Smith Photography

Posts: 5210

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

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

Photographer

Robert Jewett

Posts: 2462

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

Photographer

j3_photo

Posts: 19875

Las Vegas, Nevada, US

I'm saying B is Full Frame

Nov 13 12 02:53 am Link

Photographer

WMcK

Posts: 5286

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

Photographer

SPV Photo

Posts: 789

Las Vegas, Nevada, US

j3_photo wrote:
I'm saying B is Full Frame

Yup.

Nov 13 12 02:59 am Link

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

Photographer

Robert Jewett

Posts: 2462

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

Photographer

SPierce Photography

Posts: 19791

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

Photographer

Bill Sylvester

Posts: 1463

Cincinnati, Ohio, US

B

Nov 13 12 06:36 am Link

Photographer

Neil Snape

Posts: 9473

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

Photographer

JSVeselka

Posts: 42

Holland, Ohio, US

I have B as full frame.

Nov 13 12 06:43 am Link

Photographer

Robert Jewett

Posts: 2462

al-Marsā, Tunis, Tunisia

OK up to:

A=2
B=8 votes.

Nov 13 12 06:49 am Link

Photographer

DennisRoliffPhotography

Posts: 1928

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

Photographer

Edge2Edge Photo

Posts: 23

Charlotte, North Carolina, US

I vote B.

Nov 13 12 07:03 am Link

Photographer

Ryan Richardson Photo

Posts: 80

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

Photographer

S W I N S K E Y

Posts: 24315

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

Photographer

L A U B E N H E I M E R

Posts: 8797

Seattle, Washington, US

isn't sensor quality more important than sensor size?

Nov 13 12 08:24 am Link

Photographer

Sungoddess Studios

Posts: 5169

Atlantic Highlands, 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

Photographer

Extrosy

Posts: 656

Minneapolis, Minnesota, US

Repeat the test at ISO 6400

Nov 13 12 08:28 am Link

Photographer

Arstine

Posts: 42

Rapid City, South Dakota, US

B = full frame

Nov 13 12 08:33 am Link

Photographer

FEN RIR Photo

Posts: 719

Westminster, Colorado, US

I say B, just cause the way the chairs look in the back.

Nov 13 12 08:40 am Link

Photographer

J O H N A L L A N

Posts: 10330

Santa Ana, California, US

I think B is the full frame.

Nov 13 12 08:51 am Link

Photographer

Leonard Gee Photography

Posts: 16425

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

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

Photographer

Image Magik

Posts: 1068

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

Photographer

Robert Jewett

Posts: 2462

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

Photographer

Image Magik

Posts: 1068

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

Photographer

PicBack

Posts: 621

New York, New York, US

Another voter for B being the FF photo.

Nov 13 12 09:21 am Link

Photographer

Robert Jewett

Posts: 2462

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

Photographer

Yingwah Productions

Posts: 1341

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

Photographer

Robert Jewett

Posts: 2462

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

Photographer

Tom Nguyen Studio

Posts: 416

Shakopee, Minnesota, US

I'll play:

"B" is full frame

Nov 13 12 09:41 am Link

Photographer

Gabby57

Posts: 424

Coppell, Texas, US

"A"

Nov 13 12 09:43 am Link

Photographer

Lovely Day Media

Posts: 4313

Vineland, New Jersey, US

I think A is the full frame.

Nov 13 12 09:48 am Link