Are these the 7 RF lenses Canon will be announcing in 2020? [CR1]
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It may be 60, but it doesn't add up with my observations as I can see a longer delay in my 5DIV's LiveView. As in my message above, any internal processing including exposure can't be taking longer than a frame duration. If it takes longer, you either lower the FPS number or execute some processing in parallel CPU threads, but there isn't many threads in DIGIC 6+. Having two threads means you can process data for a 60-fps EVF not in 1/60s but in 1/30s (best ideal case). Three threads give you 3/60s = 1/20s processing time at 60fps etc.
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I checked again, and it turns out I was wrong. In the German specification site they state 30 FPS for LiveView on the 80D and 5D IV at least.
I had read 60 on a third party site a while back, but apparently they might have gotten some information wrong.
On the R, it is 60 Hz in LiveView, unless energy saving mode is used. But I can't find anything official about the EVF itself, which I find weird.
In any case you are right in that there is a significant lag in the LiveView that seems to go beyond just the frame rate refresh.
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Definitely not the only one.
In fact, I had hoped that "ultra-wide prime L" meant 14mm. But. I'll wait. May just grab one of the cheapo Samyangs to bridge me.
I've resolved to not but any new glass today isn't RF, so... I might be waiting a while.
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Unless they use different parts of the hardware for different stages of the pipeline. Then they may have several frames "in flight" with no ability to accelerate processing by dropping some frames.
Also, there are cases (such as AWB) when full information about the frame is needed for per-pixel processing. When it's not such a case, it might be possible to process the image by, say, 32-line strips, but the logistics of doing it properly in both software and hardware can be a nightmare.
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If you think about this pipeline as a black box, it should be spitting out 30 frames per second for EVF (or whatever required FPS). Now if there's just one pipe/thread inside this black box, it must be able to process the whole frame in 1/30s, no matter what hardware it uses internally and how many frames there are in the pipeline queue. Only second thread allows to delay the delivery and still render 30 frames a second. Ideal case (which won't be ideal in practice) - thread 1 processes even frames, 1/15s each, and thread 2 processes odd frames. So we have the lag of 1/15s and 30fps. But in this case, why wouldn't we just have both threads to process each frame 2x faster, so that each frame processing takes 1/30s, instead of laggy 1/15s?
There must be something I'm missing, but it may be a thing I don't know I don't know...
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(Partially) wrong. USM is a bit faster, but STM is more silent and smoother in movement. For video you will probably prefer STM. For photography STM is almost as good as USM.
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50 f/1.4 IS with image quality similar to sigma 50 f/1.4 art will not be small and affordable. It will cost as much as other L primes. There are two option for canon to make 50mm affordable and small. Use old optical formula (double gauss) but it will sacrifice image quality or make it f/1.8 that compete directly to nikon z 50mm f1.8
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10-24 sounds like overkill, especially if it's going to be bulbous scratch bait. I'd be happier with a 12-24 with screw-in filters. But I'm only speculating...
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Well, I already had 24, 35 and 50 1.4 + 85 1.8, I sold them all, after work with them for a few years. Was a hard decision, but lately I was stopping down to 1.8 - 2.2 and only using the 1.4 when the light was really low. Also, working as a wedding photographer, I noticed so much difference in my last works, This plus to change focal lengs so fast having a great aperture, was a step ahead on the work without losing quality, and just a little bit of bokeh / light. In a balance, it deserves the change. Of course, this is only my personal experience and everyone must look for his needs
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I've already given the example with multithreading where you can have 30fps but the lag of 1/15s.
Your black boxes are the same as multithreading as they require DLO and debayering to run in parallel. Say they'll run DLO for frame 777 and debayering for frame 778, then 778 and 779 respectively etc.
But as far as I understand the Canon's architecture, DIGIC is the one who executes all of those DLO, debayering etc. steps. As a side note, is DLO even applied to EVF/LV?
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Weird to have 1.4/2x TC without lenses to use them on ie only the 100-500mm would be available and @1000mm f/14 (2x) would have few use cases.
Can we confirm that the RF TCs are RF to RF? If they are RF to EF TCs then it would make some sense ie to avoid RF-EF adapter + EF 1.4/2x TC and use the existing big whites (and EF 70-200mm
)
Can we confirm that the RF TCs are RF to RF? If they are RF to EF TCs then it would make some sense ie to avoid RF-EF adapter + EF 1.4/2x TC and use the existing big whites (and EF 70-200mm
)
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But DIGIC is not (just) a general purpose CPU. It contains DSP modules optimized for particular kinds of work.
RF 24-240.
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Well smaller than a traditional 70-200 f/2.8 which I don't regard as XL, price will be high but will it be dearer than a 70-200 f/2.8 and size will be much shorter than a 70-200 f/2.8 and with smaller front element. I'm not sure it'll be heavier than 28-70 f/2 which would be a more complex design.
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Yes, we need regular f/4 non "£" lenses . Because they are not sharing the mount info with sigma and tamron, we likely won't get 100% compatibility if they decide to build RF mount lenses (ie slower af, and perhaps issues with IBIS).
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While ‘affordable’ would always be nice, nobody asking for a 50/1.4 has mentioned affordability as the main reason they want one.
I would rather a 50/1.4 with the look of the Sigma 50/1.4 EX (or the old Zuiko 55/1.2) than the 50 Art. It doesn’t need to have ultimate corner resolution or be free of all aberrations, or have a flat plane of focus, or have minimal vignetting wide open, and it doesn’t need to be cheap. Just make it SMALL, nice and sharp in the centre, smooth bokeh without nauseating swirls, and give it modern AF.
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I believe DIGIC is just ARM with extended instruction set and any DSP modules are in its firmware; but wherever the DSP modules are, the execution should be parallelised/threaded if the the EVF lag is longer than 1 frame.
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