JosephSF Loc: Sonoma County CA

Actually the form factors of the 5 D MK lll and the 5 DS/R are exactly the same: 152x116x76mm. There is a 20 gram weight difference though whereas the MK lll is 20 grams heavier - 950 g vs. 930 g. With an L lens attached this would be hardly noticeable.

The suggestion that the 5D S/R is a niche camera is laughable. It is clearly everything the MK lll is but with > 2X pixels.

thg3 Loc: La Quinta, California

I believe that the EFs lenses sit deeper into the camera body than EF lenses and the bigger mirror in a Full frame camera will actually hit the base of the EFs lens when a picture is snapped...

imagemeister Loc: mid east Florida

Doing and adhering to the things that take MAXIMUM advantage of the potential available - including percentage success rates- with the 5D S/R is what put it into a niche.

mwsilvers Loc: Central New Jersey

You are confusing things. If you are talking about the 5Ds /r, it is physically the same size as the 5D III. Both cameras are much bigger and much heavier than your t5i. In this post you refered to a 50D, not to the 5Ds/r. The 50D was an older Canon crop model from around 2007 or 2008. It too was much larger than your t5i. Not sure where or what you read that indicates the 5D III provides greater clarity than the 5Ds/r but it is not true. To be honest, your texts so far indicate a lack of basic knowledge and you may not ready for these professional level cameras. The operational differences and learning curve between these cameras and your t5i are pretty extreme. You will not be able to use crop camera specific lenses. And if you are you are planning to shoot in full auto, than you are wasting your money.

speters Loc: Grangeville/Idaho

The 5Ds and 5Dsr will give you a tad more resolution, but the Mark III is clearly the superior camera here!

MikeMck Loc: Southern Maryland on the Bay

I don't think most folks need 50 MPS, I have a 5D MK III and it is great. If you don't need to satisfy the GAS attack right away, I would wait until the 5D MK IV comes out. If there isn't much change, the price of the III's should go down.

mwsilvers Loc: Central New Jersey

Doesn't that depend what you are using it for? Landscapes and perhaps portraits will likely be superior with the 5Ds. The 5DIII is probably a better general purpose camera.

JosephSF Loc: Sonoma County CA

Oh my, I missed that. I was assuming OP was still in MK lll vs. 5Ds/r comparison mode. Yes, he is all over the place on this and confused.

OwlHarbor Loc: Pacific North West USA

I meant that the Canon Ti5 is the smaller frame body. I appreciate all of your help.

wotsmith Loc: Nashville TN

Well, here is one answer; I am a long time owner of the 5D mk3 and I rented a 5D SR for three weeks for a trip to spain.

I am blessed in that I can usually buy what I want in camera gear if I am willing to take rude comments from the wife. So i tried to buy a 5DSR today, but the camera store just sold out; so the moment may have passed.

In contrast to a lot of comments from people that read reviews and never touch the gear, I have shot both. The 5DSR is a very usable, every day camera. Yes, it likes more light (I would not shoot above 3200 ISO and expect good results); yes, it demands good technique, holding steady, squeezing the shutter etc That said you can get some fantastic shots handheld. I did a seven shot vertical format merge to panorama (only photo taken with a tripod) and got a 870mp photo with incredible detail of an old walled city in Spain. Only 92,000 pixels wide!!
I have friends using the 5DSR for bird photography with long primes and the results are amazing

So, I would recommend the 5D mk3 which is an amazing camera for over all use. Less fussy on focus, can shoot higher ISO and is an overall great camera, shoots video better. And most of the time, the photos can't be distinguished from the 5DSR. But if you do a huge crop, then you can see a difference, but not a huge amount. But if landscape is your bag, maybe the 5DSR. reviews say the 5DSR focuses better. I'll include a few photos - all handheld available light except the panorama. I have included a pretty severe crop of each and you can download and check it out. The last one is a small copy of the 860mb panorama.
I found it a very serviceable camera; but if I had to have only one body it would be the 5D mk3
You can always do what I did: rent one; I would appreciate comments; or I can post more to compare. I shot about 3000 frames.

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OwlHarbor Loc: Pacific North West USA

Bill I appreciate the comments as they help a lot. I am seriously considering the 5D Mark III for FF and great all around camera. I believe with my Canon Ti5 and the Mark III I am set for many years. Any idea what the differences in the sensor chips of the 5D s/r and 5D Mark III are?

CHOLLY Loc: THE FLORIDA PANHANDLE!

^^^About 30 megapixels! :lol:

wotsmith Loc: Nashville TN

Well the sensors are the same size both FF; therefore when you go from 28 mpix (is that what a 5D mk3 has) or what ever to 50 mpix the pixels obviously get a lot smaller. That is not good.
the smaller the sensor, the less light hits it, so the signal to noise ratio is worse, which is why the mk3 is so much better in low light. larger pixels make the camera less sensitive to movement, and I believe can be designed for better dynamic range. All better for the mk3 for every day use.

That said the 5DRS was way better than expected for inside of churches, better than I expected for handheld results and I got some great photos. I still think it is in the luxury category, but I still want one!

Btw, attached is a photo of a pygmy Kingfisher my wife shot after sunset in a dark mangrove swamp at 10,000 ISO with the 5Dmk3 with the 70-200 f2.8; modest noise reduction in LR; you could not get this with 5DSR I don't think. While noisy, still a usable photo
Good luck

5Dmk3 70-200 zoom at f2.8; ISO=10,000

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