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Aspect Ratio?
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Sep 11, 2021 17:26:42   #
ImageCreator Loc: West Coast
 
On my Canon camers there is the option of adjusting the image aspect ratio.
Can anyone give me an idea why I would want to do this? Can you tell me what happens to the image when the aspect ratio is changed?

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Sep 11, 2021 17:34:09   #
CHG_CANON Loc: the Windy City
 
You get less pixels. The pixel resolution of your EOS sensor is based on the 5x3 aspect. Using anything else causes the camera to give you less than the maximum pixel resolution. Usually, the photographer would want to decide which pixels to discard, not the camera via this setting.

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Sep 11, 2021 17:39:23   #
ImageCreator Loc: West Coast
 
ImageCreator wrote:
On my Canon camers there is the option of adjusting the image aspect ratio.
Can anyone give me an idea why I would want to do this? Can you tell me what happens to the image when the aspect ratio is changed?


Being the expert you are, have you for any reason changed the ratio?

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Sep 11, 2021 17:51:40   #
burkphoto Loc: High Point, NC
 
ImageCreator wrote:
On my Canon camers there is the option of adjusting the image aspect ratio.
Can anyone give me an idea why I would want to do this? Can you tell me what happens to the image when the aspect ratio is changed?


1:1 crops the image square
3:2 is native (35mm film, APS-C, and "full frame") aspect ratio
4:3 is old NTSC TV (pre-digital) aspect ratio and is native to Micro 4/3 and most smartphone cameras.
16:9 is new HDTV/4K aspect ratio and is native to all new video cameras.

Always express the horizontal dimension FIRST. Horizontal is usually the side of the camera with the tripod socket facing down. Every graphic designer worth her salt will appreciate that bit of clarity. So will many photo labs and printers.

7:5 and 5:4 are not native to any sensor format I'm aware of... This drives ordinary citizens crazy.

If the aspect ratio you choose is not native to the camera, you crop (discard) pixels to achieve that crop. Sometimes that's desirable; sometimes cropping in post-production is preferable.

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Sep 11, 2021 18:07:23   #
Linda From Maine Loc: Yakima, Washington
 
With the first digital camera I bought that was not native 3:2, I went ahead and changed to that aspect because for landscapes I was still influenced by years with film and I liked to compose 3:2 in camera. The few pixels I lost didn't amount to much when never printing larger than 8x12.

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Sep 11, 2021 18:13:22   #
Bill_de Loc: US
 
My neighbors like when I print 8x6. One women told me her group.likes cheap 8x10 frames which leaves a one inch border.

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Sep 11, 2021 18:20:55   #
burkphoto Loc: High Point, NC
 
Linda From Maine wrote:
With the first digital camera I bought that was not native 3:2, I went ahead and changed to that aspect because for landscapes I was still influenced by years with film and I liked to compose 3:2 in camera. The few pixels I lost didn't amount to much when never printing more than 8x10.


I use 3:2 for copying negatives and slides from my old Nikon film cameras... I use 4:3 when copying 6x6cm and 6x4.5cm 120 film negatives. Most 6x6 negs can stand some cropping.

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Sep 11, 2021 18:27:36   #
Linda From Maine Loc: Yakima, Washington
 
Regarding "what happens" (you lose pixels), there should be a chart in your camera user manual that lists the resulting number of pixels for each aspect ratio.

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Sep 11, 2021 18:39:45   #
CHG_CANON Loc: the Windy City
 
ImageCreator wrote:
Being the expert you are, have you for any reason changed the ratio?


I'm not sure where I came up with 5:3 earlier, but now too late to correct. The EOS is 3:2.

Regarding changing the aspect ratio, one would do it to save time such as another time-saving step for SOOC results at a non 3:2 aspect. I wouldn't do it, but I shoot in RAW and expect to process each and every image, including making individual cropping decisions for each and every individual image.

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Sep 11, 2021 19:38:40   #
Longshadow Loc: Audubon, PA, United States
 
I just shoot whatever "full frame" is for that camera and crop in an editor to the aspect ratio I intend to print.
3:2 for my one camera, I think the other camera is 4:3.

For some people it's easier when printing 4x6, 8x12, 24x36 to shoot 3:2, it all matches.

It's a personal choice really.
(like camera bags, vests, etc...)

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Sep 11, 2021 21:47:00   #
User ID
 
ImageCreator wrote:
On my Canon camers there is the option of adjusting the image aspect ratio.
Can anyone give me an idea why I would want to do this? Can you tell me what happens to the image when the aspect ratio is changed?

Basically make sense only for video.

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Sep 11, 2021 21:51:16   #
User ID
 
Linda From Maine wrote:
Regarding "what happens" (you lose pixels), there should be a chart in your camera user manual that lists the resulting number of pixels for each aspect ratio.


Many cameras list the dimensions in pixels on the in-camera screen page where you select your aspect ratio.

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Sep 12, 2021 06:00:47   #
Delderby Loc: Derby UK
 
Aspect ratio is also a "personal taste" issue. My own preference is for 4:3, which I have learnt to like probably because that is my camera's base aspect ratio, and I have been viewing that shape for more than a decade. Contrary to popular opinion, I find it great for landscape work too. It is certainly perfect for portraits, and works well with buildings.

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Sep 12, 2021 06:09:52   #
TerryVS
 
7:5 and 5:4 are not native to any sensor format I'm aware of... This drives ordinary citizens crazy.


However, if posting on Instagram the 5:4 ratio is perfect!

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Sep 12, 2021 07:48:16   #
BebuLamar
 
User ID wrote:
Basically make sense only for video.


Do you have choice for aspect ratio on these camera for video?

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