Why would I need to use the cropping feature on an EOS R6 Mark II?

[Cantrell]

All,

Talking with a person in a camera store about purchasing a RF70-200mm F2.8 lens so that my pictures would be sharper. We discussed the usual suspects on getting sharp pictures such as focusing and other elements. Then a comment was made about using a prime lens or the cropping feature of the EOS R6M2. Why would I need to use the cropping feature on a full frame camera? I had a R10 before the R6M2. Thanks for any and all comments.

Reese

[Waddizzle]

There’s arguably little to no difference between using crop mode in the camera or cropping the image in post. In either case you will lose resolution.

The only “benefit” to using crop mode in the camera is that your cropped images would consistently be the same size.  Small.

[jrhoffman75]

If you are recording images in JPEG you can get a telephoto effect by switching to the 1.6 Crop Mode setting. Useful for social media posting w/o further editing.

If you are using third party APS-C lenses the crop mode will give rectangular images rather than circular images (since th image circle won't cover full frame sensor area. Canon EF-S lenses will automatically shift to crop mode.

[Cantrell]

John and Waddizzle,

The conversation was to set 1.6 Crop Mode. I would use my RF such as the 28-70mm F2.8 or RF100-400mm or 24-240mm lenses. I shoot in RAW.

Thank You

Reese

[Waddizzle]

“ Talking with a person in a camera store about purchasing a RF70-200mm F2.8 lens so that my pictures would be sharper. We discussed the usual suspects on getting sharp pictures such as focusing and other elements. Then a comment was made about using a prime lens or the cropping feature of the EOS R6M2. Why would I need to use the cropping feature on a full frame camera? I had a R10 before the R6M2. Thanks for any and all comments. “

” 

The conversation was to set 1.6 Crop Mode. I would use my RF such as the 28-70mm F2.8 or RF100-400mm or 24-240mm lenses. I shoot in RAW.

Thank You “

———————-

I had thought that I understood your question. I thought that I had answered it. There’s no benefit to using crop mode with a full frame lens. 

Did you ask the commenter who raised the idea of using crop mode on a full frame lens?

As John pointed out the only benefit to using crop mode is if you’re using a cropped lens.

[Cantrell]

Waddizzle, 

Thank you

Reese

[johnrmoyer]

I have 2 reasons for using crop mode on my EOS R5. One is less storage consumed if I plan to crop later anyway.

With my EOS R5 and 1.6x crop mode, it seems to me that eye detection for a small bird among foliage sometimes works better than full frame. With the EOS R5, I still have nearly as many pixels in crop mode as I had on my EOS 80D, but I do not think that would be practical on the R6.

[wq9nsc]

If the conversation was about prime versus zoom lens, he was probably making the general statement that lens image quality tends to be lower as you get to the edges of the lens so the corners are a bit less sharp.  This is less of an issue in most more expensive lens and since the optical design of a prime tends to be simpler and most of them are at the higher quality end of the scale then the image quality loss in the corners is not as obvious.

So by switching to crop mode, you are being forced to compose your scene where it fits within the "sweet spot" of the lens.

Personally I wouldn't bother and the ONLY good reason for you to use crop mode in capture is to reduce file size.

Rodger

[Cantrell]

John,

Thank you for your reply.

Reese

[Cantrell]

Rodger,

Thank you for your response.

Reese