Hi,I have often wondered why DSLRs don't do sort of a compromise mirror function where during high fps mode (think 7D Mark II 10 fps) the camera doesn't just lock the mirror up for the second or two it takes to fire off 10-20 frames and then drop the mirror back down. Seems silly to slap the mirror up and down 10 times a second when the viewfinder is less useful. But I also get it and understand that a good photographer by habit can see and notice things as the viewfinder "refreshes" even though it's only a fraction of a second between frames.
Because losing a whole second or more of viewfinder time means your very likely to misframe your subject or even clip part of it out of the frame when tracking something moving. You would be surprised at how much we can see change in a fraction of a second.
That's the same reason the real-time view of an OPTICAL viewfinder is so desirable...you really FEEL the lag in an EVF when tracking a subject with continuous shooting. Until the lag time gets into the microseconds range, I personally don't think I could use an EVF for action shooting. It's one of the big things I'm curious about regarding the NX1. They claim 5ms lag, which is low...but, it's not real time, and I wonder how much I'll be able to "feel" that lag.
Totally agree jrista, just like I typically agree with almost all of your posts. I guess I'm a fan, LOL! Note that I did mention being able to still see what's going on during the fps action of the mirror. However, for those times when silence is top priority, it would be nice to have this in an easier way to implement than LiveView.
I think the mirrorless design, in some form, will eventually become a standard in the industry. And until Canon or Nikon do it in a big way, it will continue to be a niche market. The pros won't waste time with small little wanna-be systems that can't match the full ecosystem that Canon and Nikon have offered for decades.
But the little niche systems will pave the way so to speak and flesh out the bigger obstacles and failures. I think this is what Canon and Nikon are waiting for.
Yeah, the niche systems are the guinea pig systems. Hopefully they will figure out the best way to solve these problems, and the big players will copy them.
There was talk about some kind of Hybrid EVF/OVF from Canon earlier in the year. Nothing ever seemed to come from that, unless Canon is calling the Transmissive-LCD updates in the 7D II to be a "hybrid EVF" (which would be a joke.) I really want to see some kind of convertible viewfinder. There are certainly uses for an EVF, such as the need for a silent shutter without the mirror slap sound, video recording, etc. There are also uses for an OVF, such as the action photography where lag can be extremely annoying at the very least, and image-killing at worse (the A7r I rented periodically seemed to build up major lag and stutter...I could never figure out why, but sometimes the frame rate would drop into the low teens, and the lag would jump to a second or so.)
EVFs have to perform exquisitely, with say 500µs lag and no stutter ever, (and be ultra high resolution and high DR, like 8000ppi) before I would consider them as a truly viable replacement for an OVF during action shooting.
Totally agree jrista. At some point, when does the cost of the EVF (and/or EVF/OVF) system start to cost more than the sensor itself? Because the challenge is significant and as you say, the performance must be perfect and impressive to pull off replacing a good OVF. In a crude way, the EVF is sort of a sensor in reverse and while the resolution doesn't need to match by any means, the performance, accuracy, sharpness and overall IQ + performance must go far beyond what we are currently seeing.
Current mirrorless camera work very well for most photography except sports and wildlife and IMHO, the 2 main obstacles for mirrorless camera are:
1) Servo AF - tracking of moving targets and I got a feeling that NX-1 isn't working very well as most "review" seem not too "eager" to comment on it.
2) Battery life - the EVF, imaging sensor and processor are working all the time when you put you look through your EVF and that drain a lots of power.
By the way, most LCD have problem working properly under very cold temperature, so I think it'll be a problem for mirrorless camera to make the EVF work properly under this condition.... just wonder how they solve this problem for the EVF in those video camera when shooting in very cold temperature such as at the pole??
Have a nice day.