EF-S lenses on R10 with adaptor: Does cropping occur?

[MrWalleye73]

Hi....I've thoroughly confused myself, which is quite common. Looking at an R10, it is APS-C. EF-S lenses were made for APS-C as well. Would this camera crop those lenses too? Or would that be just be the full frame R series bodies that would crop to 1.6X? Hope it makes sense. 

Thanks

[rs-eos]

No cropping would occur. The only time that would happen would be if using an RF-S lens on a full-frame R-series body.

[MrWalleye73]

Thanks for the reply. It was what I was thinking. Now to decide if I want that camera....whole other confuse myself process. 😁

[ebiggs1]

MrWalleye7 cropping is a poor word to use to describe what happens.  When you use a  so called crop sensor camera nothing is cropped. It is full frame, FF, and you get exactly what you see in the VF. What is different is the "angle of view", AOV, or angle of acceptance. Basically saying if you were to compare it, and there is no reason to compare it, but if you did, let's use a 28mm lens example on a FF body opposed to the very same 28mm lens on a crop sensor body. The 28mm lens has an AOV of 74 degrees. If a camera has a crop factor of 1.6x, a 28mm lens would behave like a 45 mm lens on a FF camera.

 This means the AOV would be narrower on the crop sensor camera compared to the FF camera with the same 28mm lens but there is no good reason to do this comparison. If you are crop body owner then you need to use the FL that suits your purpose and not worry what that same lens looks like on a FF body. In this case you would select a lens in the 17mm range.

I hope this clears it up a bit for you. There is no good reason to even have the term "crop factor" and in fact it mainly only applies to the FF vs the crop sensor cameras. The guys that use medium or large format cameras for example don't bother or concern themselves with crop factor although it's there only in reverse. 

[MrWalleye73]

Thanks as well. This makes sense. I'm an old FD and EF FF film shooter and working my way into digital more. I can get my hands on some EFS glass (inherited) to to use with an R10 and adapter. I'll get the terminology and technology down as I start using a camera. 

[rs-eos]

While what you wrote is correct, the original question was specific to the camera potentially using a smaller area of the sensor with certain lenses. That would only occur if using an RF-S lens on a full-frame R-series camera (camera goes into crop mode and uses an APS-C sized portion of the sensor).

[normadel]

"MrWalleye7 cropping is a poor word to use to describe what happens.  When you use a  so called crop sensor camera nothing is cropped."

This from a Legend? A crop-sensor CERTAINLY DOES crop. It is capturing PART of what comes through the lens. The crop factor is the ratio of the sensor area to the "full frame" image.

[normadel]

"MrWalleye7 cropping is a poor word to use to describe what happens.  When you use a  so called crop sensor camera nothing is cropped."

This from a Legend? A crop-sensor CERTAINLY DOES crop. It is capturing PART of what comes through the lens. The crop factor is the ratio of the sensor area to the "full frame" image.

[ebiggs1]

"A crop-sensor CERTAINLY DOES crop."

It only "crops" if you insist on comparing it to a FF camera. Otherwise there is no cropping and there is no good reason to do the comparison. If that is a concept beyond your ability to understand I can't make it any more clear.

When you look through the VF you see what you see and you will get what you see there is no cropping. The term "crop sensor" is totally unnecessary. And the farther we get away from 35mm film days it becomes even less relevant.

However if it pleases you to continue using it by all means go a head but the fact remains nothing is ever cropped.

[MrWalleye73]

Thanks all....I'll be using APS-C lenses with an APS-C camera with lens mount adapter.  Works for me.  I read up some more and I understand what does what now. If I use my older just EF lenses, I read what happens there too.

Thanks again!!

[ebiggs1]

"...  the original question was specific to the camera potentially using a smaller area of the sensor with certain lenses. That would only occur if using an RF-S lens on a full-frame R-series camera (camera goes into crop mode and uses an APS-C sized portion of the sensor).

Ricky,

I agree, if the term "crop sensor" does make any sense this is probably where it does so. You are physically cropping your sensor. However again if you don't have a FF camera and you do have a cropper then from your perspective nothing is cropped. Plus until you are told by someone like normadel you would never know it or be aware of it in your world nothing is cropped. And you would be correct.