« Last post by CarlTN on Today at 03:57:00 PM »
Well, what exactly do you want to see and what lens do you want the samples made with?
1) If you will try to compare 'camera JPEGs' the huge difference will be the DIGIC brains that do RAW -> JPEG conversion (with lens correction, ALO, etc.). (In case of XTi to 6D comparison, 6D is the Einstein and XTi is the caveman )
2) If you will try to compare 'camera RAWs' you will be at mercy of RAW conversion software camera presets (and number of bits in RAW data -- 6D has more than XTi).
PS: In my experience it's the FOV that makes the main difference. I used to shoot with XTi and 10-22 + 24-105 lens pair for years, and I always considered '24-105' as normal-to-tele lens (and I did not use it very often). The 6D changes the picture, now all my EF lenses make very (and I do mean 'VERY!') different pictures...
I agree with you. So yeah, I didn't consider JPEG. I also didn't mean FOV, because that's an obvious difference.
Other than that, I didn't have anything specific in mind. Because several reviewers mentioned that IQ is a BIG upgrade from crop, I just wanted to see an example, whatever shots they choose (other than high ISO) and see for myself how big the difference is.
I remember a landscape scene comparison on POTN between 7D and 5DII. While FF looked slightly better with color and detail / contrast, at web resolution it was not a huge difference by any means.
The only way you can justify for yourself if you like the improvement the 6D has over the 70D, is if you use both cameras for yourself, in the situations you shoot in, with the lenses you use. You can't depend on just looking at the work or tests of other people to decide. Plenty of people take great shots with iPhones and compact cameras, especially if it's just content that's displayed at websize. Doesn't mean those are as good as a 6D, but it does mean it depends on WHAT YOU WANT to get out of it, and if you prefer the ergonomics and experience of using a full frame or any specific camera or system.
I used my 50D for 4 years and had over 25,000 shutter cycles. I loved that camera to death, and planned to keep it a bit longer after buying the 6D. After the first couple of days of using the 6D, I had decided to sell the 50D. Eventually a kind gentleman from those internets saw my sale ad, and paid me handsomely for it!
Frankly, if you only shoot birds in very bright daylight with a very high quality telephoto lens (perhaps any of the "big whites"), a 70D very likely makes more sense. The autofocus is no doubt as good or better than the 6D's in bright light, and you get a ton more reach. In the dark, the 6D's center point works where all others in the world do not...and even seems to work better on an f/4 lens in these conditions than an f/2 lens, like my 135L.
For most other stills photography situations, the 6D will excel over the 70D. Perhaps the 70D's image quality is better than the older 7D's, but keep in mind the 7D has generally better AF performance than both the 70D and the 6D...or at least that's what I gather. But the 7D has luminance noise that looks like a gravel driveway overlaying the image starting at about ISO 400. I'll grant you that it isn't as obvious until just above there, but that's not saying much. At ISO 1000 the 7D basically equals the S/N ratio of a Powershot G15 at its own ISO of about half that. That doesn't speak well for the 7D.
Also, one of the main advantages such a high quality image from the 6D is important, is the ability to crop into an image...even one that is shot at high ISO. You can't do that with as much success with the 70D. At the time of shooting, you don't always know or realize, exactly the framing you want...or that a slight or moderate crop winds up looking better when you look at it later on the computer.
For video, the 70D might be better, depending on the situation.
So, if your work is mostly going to be displayed at web sizes, AND YOU HAPPEN TO NEVER EVER CROP INTO AN IMAGE...then you have a lot of affordable choices at your disposal. If you need the flexibility of a Ferrari at Hyundai prices where image quality is concerned, go for the 6D.