i made the jump from pentax to the sony a7r, and while some aspects of it have been a rocky road, it's given me the ability to do things that i could never do before.
i've been able to use all of my old lenses, albeit in full manual mode, but what i miss is losing three p-ttl flashes... they'll all have to be replaced with sony stuff, if i want to shoot beyond the camera's x-sync speed.
so there is a price to pay in switching platforms, regardless of what they are.
the huge win with the a7/a7r, and several other mirrorless cameras, is the ability to accurately focus the camera with the electronic viewfinder... you can use focus peaking, but i usually use the magnify function.
evf focusing blows away any optical viewfinder focusing system on the market, and it's only going to get better, as evf displays mature and improve.
the full-frame sonys are similarly priced, or a whole lot cheaper, than their dslr counterparts... for instance, since the a7r and the nikon d800e both have the same sensor, they have similar picture quality(both are far superior to anything canon has), but the a7r is quite a bit cheaper.
comparing crop sensor cameras, like the sony nex/6000 series, to dslr crop sensor cameras, can be quite a bit more complicated, it's not nearly as cut and dried.
i personally would never buy anything from olympus, largely because the company has been losing money for the last three years, and the company has been involved in a series of financial scandals, their future is uncertain.
also, the performance of those ultra-small sensors leaves a lot to be desired when it comes to things like iso capability.
where sony has been remiss is in native lens selection; for the a7/a7r, there is one killer world-class prime, a second prime that is also xlnt but very dark, and only one zoom, that has controversial picture quality... but since i have over 20 lenses that i can use on the a7r, none of that means much to me... legacy glass can be very cheap.
you have to get the camera system that works for what you want to shoot, period... for example, for shooting weddings, i'd want the nikon flash system, it's probably the best there is; for long glass, canon lenses are the way to go, fortunately there is an expensive adapter that allows canon glass to communicate with the nex/a7/a7r cameras, albeit not as cleanly as with a native canon body.
i've been able to use all of my old lenses, albeit in full manual mode, but what i miss is losing three p-ttl flashes... they'll all have to be replaced with sony stuff, if i want to shoot beyond the camera's x-sync speed.
so there is a price to pay in switching platforms, regardless of what they are.
the huge win with the a7/a7r, and several other mirrorless cameras, is the ability to accurately focus the camera with the electronic viewfinder... you can use focus peaking, but i usually use the magnify function.
evf focusing blows away any optical viewfinder focusing system on the market, and it's only going to get better, as evf displays mature and improve.
the full-frame sonys are similarly priced, or a whole lot cheaper, than their dslr counterparts... for instance, since the a7r and the nikon d800e both have the same sensor, they have similar picture quality(both are far superior to anything canon has), but the a7r is quite a bit cheaper.
comparing crop sensor cameras, like the sony nex/6000 series, to dslr crop sensor cameras, can be quite a bit more complicated, it's not nearly as cut and dried.
i personally would never buy anything from olympus, largely because the company has been losing money for the last three years, and the company has been involved in a series of financial scandals, their future is uncertain.
also, the performance of those ultra-small sensors leaves a lot to be desired when it comes to things like iso capability.
where sony has been remiss is in native lens selection; for the a7/a7r, there is one killer world-class prime, a second prime that is also xlnt but very dark, and only one zoom, that has controversial picture quality... but since i have over 20 lenses that i can use on the a7r, none of that means much to me... legacy glass can be very cheap.
you have to get the camera system that works for what you want to shoot, period... for example, for shooting weddings, i'd want the nikon flash system, it's probably the best there is; for long glass, canon lenses are the way to go, fortunately there is an expensive adapter that allows canon glass to communicate with the nex/a7/a7r cameras, albeit not as cleanly as with a native canon body.
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