Sony A7 III vs Sony A7R III vs Canon EOSR vs Nikon Z6

Hello Everyone,

I am new here. ( I follow this forum but never posted before). Please excuse me if I missed any rules.
I am an amatuer and a hobbiyst photographer.

I have been learning photography for couple of years and want to up my game now.
I used to use Nikon D5200 but I have a clean slate now (sold my gear)

What am I looking for:
Advice on Camera and System which will future proof me given that am just a hobbyist and I don't know want to make mistake in choosing the right gear as I can't afford to change it later.

My Areas of Interest:
Landscape, Travel & some family portraits. ( I chose 16-35 and 70-200 focal lengths)

After some research I decided on buying Sony A7III but the new release of Canon EOS R and Nikon Z6 confused me as everyone says that these new systems will have faster and better lens in future.

What confuses me more is the last 3 options cost the same. So I dont want to make a wrong decision.


Sony A7 III 2,000 2,600 2,000 2,400 2,150
Sony 70-200 F4 1,358 1,358 1,358 1,299 1,400
Sony 16-35 F4 2,200 1,350 1,350 990 1,097

Total 5,558 5,308 4,708 4,689 4,647

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David Pavlich's picture

If it were me, it would be the Nikon or Canon for two reasons; first, their adapters work seamlessly with their excellent lens lines. Second, and this is my foible and very subjective, Nikon and Canon pretty much stayed with the form and function of their pro DSLR line (D800 series, 5D series) and stayed away from trying to emulate the too small for me Sony line.

Best advice is to go to a good camera store and give them a look see and ask the pros there.

John Vander Ploeg's picture

Assuming you want to shoot stills and are not a big video guy, I would stay away from the eos R as it has a much lower res sensor and no ibis. Historically Canon has had the sharpest lenses, possibly due to their 54mm EF mount they’ve had since the 80’s. In theory Nikon should be able to design similar lenses with their new 55mm z mount, giving them a distinct advantage over Sony in the coming years. Currently Nikon and Sony sensors are on par with each other while Canon sensors are generally lower res and lack dynamic range. Canon could easily release a better sensor in the coming years but Sony may have to change their mount to stay competitive. Nikon and Canon have much better weather sealing than Sony. If you are into landscape photography I’d stay away from the lower res z6 and a7lll. The high res sensors really do offer superior detail (with the right lens) and awesome cropping ability. With all of this said, the A7r3 is probably the most complete mirrorless ff camera on the market right now. If it was me, I’d hold on to my money and wait to see what Nikon and Canon’s second gen mirrorless camera’s look like. If you can’t wait, I’d go with the Nikon Z7 as it has a super high res sensor, IS and a bright future for upcoming lenses with its z mount.

Michael Clark's picture

On the other hand, other than the very few Z mount lenses currently available along with adapted (mostly very expensive) type 'E' F-mount lenses, Nikon is still hamstrung by the mechanical aperture lever and all of its disadvantages until many more lenses have been released for the Z mount.

If you're on a budget, consider the Fuji XT3... Everyone seems to rate it as the best money can buy camera on the market. For the EOS R and the Z6 the native glass offer is way too limited at the moment.

Hi Ramesh,

Personally I would try them in a sho first and see what suits. For your needs all will be wonderful. Don’t worry about the minor differences in technology, sensors, DR etc. Instead focus on what you feel comfortable with, usability for you, ergonomics that feel right to you. All three brands produce wonderful kit. Spend your time looking at the lenses too making sure they are what you need. No point buying into a system if it doesn’t have the lenses you want. While Sony can be adapt to take canon and Nikon lenses there are compromises to be had. If tou are happy with those fine. Canon and Nikon have a massive selection of wonderful lenses which will work perfect with their bodies so don’t worry on that front. In fact, in the case of Canon you can even gain features using an adapter.

I know it is a lot to think about so as I said, head to a shop and try. Be infltnot by the salesmen but by what feels right. Photography is more about you than the kit so many get wrapped up about

Lorretta Clarke's picture

I can tell u now u will probably be more confused with the replies to your question. I am in the same position. I would depends what u r shooting. Outside shooting weather sealing - sony needs tlc. Lightness backpacking probably xt3 (i know its crop) but ff mirrorless good glass r heavy. Its a misnomer unless u carry few non zoom that they r light - but they r smaller bodies. I do believe that the best sony is the A7riii.

Michael Clark's picture

There's no wrong decision here. All of the cameras you are considering are more than enough to do what you want to do. They're all much more capable than the personal limits of most photographers.

Although there are no "wrong answers" here, there's also absolutely no way to "future proof" a decision made today regarding which will be the best system 3 or 5 or 10 years down the road. No one knows that at this point and anyone who claims they do is either a liar or a fool.

The largest differentiator for me would be the fact that the Sony and Canon models all have all electronic connections to their lenses (including same brand legacy lenses that can be used seamlessly with the newer systems via adapters).

Adapters get knocked for what you sometimes have to give up to use adapted lenses, but that is almost exclusively a concern for cross brand adaptation. With same brand adapters, the communication protocols are not reverse engineered because the designers have access to all of their their own company's protocols and trade secrets. So while adapting a Canon lens to a Sony camera can cause performance or compatibility issues, using a Canon adapter to use a Canon EF lens on a Canon R or Canon EF-M camera does not.

To use almost all legacy Nikon F lenses (AF-S type G/D/E, AF-P type G/E, AF-I type D, and AF-S/AF-I teleconverters) other than the few type 'E' lenses (not to be confused with much older 'series E' lenses) on the Nikon Z6 or Z7, the adapter has to translate the electronic communication from the camera to a mechanical aperture control lever. The mechanical aperture control lever has been one of the biggest disadvantages of the Nikon F mount since other camera makers started moving to all electronic connections between lenses and cameras in the late 1980s. Since it is mechanical, it is subject to wear and calibration issues. It's also way too easy to bend the camera side lever (in the adapter for a Z series camera) when attaching a lens that isn't properly lined up before twisting it on. I would avoid any scenario that involves sinking money into lenses with mechanical connections, other than the mount ring itself, between the camera body and lens. The future for everyone is definitely all electronic connections, and has been since the late 1980s when Minolta and Canon first took that leap.