bfstuff

First, a little perspective... I'm 67, an amateur (with plans to stay so), still shoot with a Canon T2i. I have limited budget, so I consider upgrading only when I need something I don't have. I've been considering upgrade to 80D primarily to get articulating LCD screen and ability to fine tune focus adjustment of lenses. I missed the Black Friday sale on Canon Refurb site last year, and am waiting to see if it repeats itself this year, or will wait until 90D (or whatever) comes out to upgrade economically. I've thought about going to FF, but that is farther out due mostly to cost of having to replace my EF-S lenses.

Now for the questions...

First, from the videos I've watched, the EOS R is physically capable (with an adapter) of using my EF-S Lenses, however, it avoids the vignetting issue created when using them on current FF DSLR cameras by automatically cropping the image inside the EOS R to a smaller size (presumably about that of APS-C). Does that mean that the 30.1 MP image will be cropped to (about) 18 - 19 MP (30.1/1.6 crop factor), or does it somehow maintain the full MP, but just use a smaller portion of the focused image?

Second, if the EOS R crops, what would be the difference in that and using an EF-S on a FF DSLR (until I can afford to go to EF lenses down the road) and cropping the image myself, in post, to eliminate the vignette?

Finally, has anyone seen whether or not the EOS R can accomplish & save focus micro adjustments for various lenses?

I guess what I'm trying to decide is whether to continue on my planned upgrade path over the next few years, or go ahead and substitute the R instead of a FF DSLR somewhere in my plan? Should I perhaps even eliminate the 80D altogether, and waiting until after the EOS R comes out with a new version to eliminate any bugs or get the original at lower cost so as to be able to use my EF-S lenses without manual cropping in post, until I can get added funds to convert to EF lenses later on?

I appreciate your answers and input!

imagemeister Loc: mid east Florida

First, the 30MP will drop to approx. 12 in crop mode.....

Second, you physically cannot use EF-S lenses on a full frame Canon DSLR camera.

Third, the mirrorless needs NO micro-adjustments !

Fourth, get the 80D NOW and do not look back .8-)

..

PHRubin Loc: Nashville TN USA

For what it is worth, as I understand it, EF-S lenses by Canon cannot be used on FF cameras, there is an interfering tab. Lenses from other manufacturers do connect. I have no idea whether or not this applies to the new R.

PHRubin Loc: Nashville TN USA

PS: The 80D new is currently on sale, but not for long.

Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga

I don't shoot Canon, but one thing is easy to answer. That is your EF-S lenses project a smaller Circle of confusion and as such, it won't cover the full sensor, so yes, you will have to crop in post. With Canon's regular DSLRs, you can't physically use an EF-S lens on a full frame body although you can use EF lenses on a crop body. You would lose MP's using EF-S lenses on the "R", but at least you can still use them, unlike the full frame DSLR models.

DWU2 Loc: Phoenix Arizona area

I think your questions are addressed in this article: https://www.dpreview.com/articles/8297129727/the-canon-eos-r-isn-t-quite-the-mirrorless-5d-youve-been-waiting-for.

mwsilvers Loc: Central New Jersey

I believe I read yesterday that ef-s lenses can be mounted on the new EOS R with an adapter and the camera will accommodate those lenses' smaller image circle without vignetting, similarly to Nikon full frame cameras. I could certainly see doing so for occasional use with certain lenses, but to me it would not make sense to buy a full frame camera for use primarily with lower end crop lenses.

Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga

I guess you missed the part about a limited budget...That said, I shoot Nikon and almost all of my lenses are FF except a few wide angle models as before I got an FX body, I needed to reclaim the wide angle range on an APS-C DX camera. I also was budget limited....

Elmerviking

I am sorry but I have to correct what you said. “Circle of confusion” has nothing to do with how much a certain lens covers the sensor! Do a Google search and it will be explained much better than I, with my limited English knowledge can explain.☺️

Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga

You are right, my bad. I was referring to the cone of light passed through to the sensor. On crop sensor optics, it's smaller than on a full sensor designed lens

DWU2 Loc: Phoenix Arizona area

Can you please elaborate on your first statement? It seems to me that on the EOS R, if you use an adapter, there will be a crop factor, just as there is when you use an EF lens on an EFS camera. But, the effect of having a crop factor is that only the center portion of the image is captured by the sensor. It's like moving a flashlight farther from a wall - the circle the beam projects gets bigger. However, the entire sensor is used to capture the image. So, a 30 MP sensor will capture light on all 30 MP, not on some smaller number.

On your second statement, it is generally true, but Canon, according to multiple sources, designed the adapter to allow both EF and EFS lenses to be used on the EOS R.

Elmerviking

That is not true! A crop sensor lens (Nikon Dx for example) on a full frame camera will give you dark corners because only part of the sensor, or film, will be used!
A full frame lens on acrop sensor camera will only use center part of the image thus creating a sharper image.
(I know some will disagree with this statement..LOL)
/Bosse

Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga

You have the crop/full frame backwards....The crop sensor designed lens projects a smaller cone of light on the sensor thus it won't cover the full frame sensor.

mwsilvers Loc: Central New Jersey

All the more reason to not buy his expensive body just to use it with crop sensor lenses. He'd be better off getting the very good Canon 80D body for $1000 to use with his crop lenses and save a bundle in the process. or he could wait for the 90D which could possibly even be a mirrorless model and still save a bundle. Either way, buying the EOS R to use strictly with EF-s lenses is a poor buying decision.

imagemeister Loc: mid east Florida

As pointed out, you have some misunderstanding ....