From Canon 6D to mirrorless

Started 4 months ago | Discussions thread
Cato1040
Cato1040 Veteran Member • Posts: 3,948
Re: From Canon 6D to mirrorless

Rado R wrote:

ecka84 wrote:

Unfortunately, you and many others (including your suggested youtuber) are terrible at math. Because FF 24-105F4 is equivalent to APS-C 16-70F2.6. Not F4.

So, how big is and how much does the XF 16-55F2.8 weight? Same goes with XF 50-140F2.8, which is simply "destroyed" by the faster, smaller, better and cheaper FF 70-200F4.

Learn equivalence. Don't believe lies.

I said they are equivalent when it comes to landscape! For landscape photos, you care only about how wide is the lens and not speed or shallow depth of field. Most landscape photographers actually stop down to get best lens sharpness!

An exposure on crop at f4 is exactly the same as an exposure on FF at f4. You will get more light on FF, but that doesn't change your exposure as the extra light hits *different* pixels. The center pixels (where the crop sensor would be) are hit at exactly the same intensity on FF.

Try it - same ISO, same SS, same sensor, same aperture. Take one photo at 24mm and one at 16mm and then crop to the 24mm equivalence. Except for dof, perspective and IQ due to the resizing, the exposures will be exactly the same assuming that the lighting conditions did not change. Then, come back and tell me how terrible at math I am again.

Equivalence is tricky and depends on what you're looking for.

Yes, the same SS, same aperture, and same ISO (the biggest variable) and the exposure should be the same; but when you use a smaller sensor or crop into a smaller sensor, as you mentioned before, you lose overall light, which can decrease the signal to noise ratio.

Whether that is to the point where the user cares about it or not is another issue.

Also, if one would significantly need to stop down their aperture to increase the depth of field on a larger vs a smaller sensor could be another factor (though focus stacking can also be an option).

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