Canon EOS R7 pre-sales discussion, hypothesizing, and prognosticating

Choderboy wrote in post #19383605
Exactly:

Olympus: Pro Capture
Nikon: Pre Release
Fuji: Pre Shot

I think this is an exciting feature! At least in principle. We have to test the execution and then there is the detail of how easy/cumbersome it will be to use the pre-shutter-release images.

The average human reaction time to press a button, given a well-defined stimulus event, is somewhere in the 200-275ms range, according to a survey of websites found on the net. This one, in particular, is fun to test your clicking skills. (as mentioned in the link, it isn't too accurate and includes the computer-monitor latency as well, but close enough)

https://humanbenchmark​.com/tests/reactiontim​e

Let's say the reaction time is 250ms. If the advertised "minimal EVF Lag" of the R7 is <250ms then the total time between the moment you want to capture happening and your finger finishing the depression of the shutter button after seeing the event in the EVF would be < 500ms or 0.5s and the image you wanted to capture would be in the buffer.

TeamSpeed wrote in post #19383367
Again though, canon could send out an update that lengthens the buffer. It has been done before.

That would be interesting. Technically the buffer is limited by the hardware used. But if Canon has deliberately used only part of the hardware in the initial release then it is possible to update later. Otherwise nogo.

Levina de Ruijter wrote in post #19383378
Pre-ordered last night. Expected delivery 29 July.

All eyes are on you starting July 29th...

rndman wrote in post #19383636
That would be interesting. Technically the buffer is limited by the hardware used. But if Canon has deliberately used only part of the hardware in the initial release then it is possible to update later. Otherwise nogo.

The 7D had a huge firmware update a couple years past its release, probably because the masses were getting restless waiting for the MK2. It added many additional items, and lengthened the buffer pretty substantially.

rndman wrote in post #19383638
All eyes are on you starting July 29th...

LOL

Would you believe that 29/7 is my birthday? It’s true!

Levina de Ruijter wrote in post #19383647
LOL

Would you believe that 29/7 is my birthday? It’s true!

Aa ha. A birthday gift from Canon then...

The R7 is announced, and all of a sudden POTN is alive again

ct1co2 wrote in post #19382378
I could not have been more wrong in what I thought the R7 price would be. Being so wrong in that way also drove me to pre-order it. I have concerns about it such as handling and the buffer. I'll be curious to what extent shooting in CRAW, which I use now, will help with where the buffer limits are. However, I also see positives such as price point, resolution, and the AF. I was considering upgrading to an R5, but hesitated as the R6 has served my needs 95% of the time. Pairing an R7 with my R6 is net less expensive than upgrading to a new R5. Could be a great combo for various scenarios. For me, it may be difficult to come to a final conclusion without actually using the R7.

The smaller your output files, the less the burst rate drops once the buffer is filled, so cRAW will definitely keep the speed from dropping as much as it would for full RAW. Whether or not it is close to full speed for 30fps e-shutter is another question, and 15fps mechanical is far less likely to see much of a drop with cRAW.

Minus any overhead from managing the buffer and file systems, the card write speed and file sizes should be the main determinant of fps once the buffer fills.

umphotography wrote in post #19382385
$1500 sure looks a hell of a lot better than 6K or 4K for the R5. And file size is right where I would want it to me as well for wildlife.....Im just NOT SURE how this sensor and the electronics are going to work. You can make an R5 shoot at 1.6 format. Im wondering if its going to have same appeal as a 7D sensor...we all bought crops for the extra reach. So How is that going to work on a RF 100-500 v/s using a 500MM EF lens on a 7D2 to get to 800mm FOV....probably a dumb question but Im wondering how all that is going to work out

The 90D has less noise than the R5 in crop mode, if you view both at the same image scale, so unless the noise of the R7 is a bit higher than the noise of the 90D, the R7 should have less noise than the R5 in crop mode, and has almost double the pixel count, too. As far as your two 500mm lenses are concerned, that's down to apertures and aberrations. A 500/4 is obviously going to give les noise and more analog sharpness at an f/4 that the RF100-500 doesn't have (f/7.1). Lens first for the underlying analog image; focal length divided by pixel spacing for the number of pixels across the subject.

Ranked from best to worst, you should expect something like this:

Pixel resolution: R7, 7D2, R5crop, with the 7D2 much closer to the R5crop than the R7

Noise: R7, R5crop, 7D2, with the R5crop in about the middle, maybe a little closer to the R7.

All assuming that the R7 images exactly like the 90D. If there is less noise in the R7 than the 90D, then the R7 will have the cleanest APS-C sensor area of any Canon APS-C or FF camera, as the 90D is already about the same as the R6 in crop mode.

Jeff USN Photog 72-76 wrote in post #19382414
I am thinking of keeping my 90D as a backup and getting rid of the R7,

I'll take that R7 off your hands for $1600 plus the tax you paid on the $1499. That would put it in my hands for the the rearing of fledglings in the next few weeks.

What do you lose shooting with CRAW versus RAW? I've read that there's some additional noise in underexposed areas but is it significant? Are there compression artifacts or other effects to be concerned with? Have the R5/R6 users here used it? Thanks!

I am trying to work out how well Canon and third party EF lenses AF will work with this camera, particular my Tamron 150-600, any ideas?

Also does anyone know if video invert MF assist is available with the R7?

Peter2516 wrote in post #19382539
Paging teamspeed can you or someone explain this feature on R7, burst pre shooting in raw something like that. Sounds interesting.

Hosted photo: posted by Peter2516 in
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forum: Canon Digital Cameras

That means that instead of the normal live view video, which does a low-quality but high-speed line-skipping scan of the sensor, the camera will be reading the entire sensor and applying your exposure parameters to al the frames it is scanning, as if it were taking a video, but instead of giving you one file that is a video, it will discard frames after 0.5 second, but if you do fully-press the shutter, it will start saving the frames to the memory card going forward, after also saving the frames from the previous 0.5 seconds. So, there are always 15 frames at 30fps from the recent past which will get deleted after they are older than 0.5 seconds, or may be saved to the card, if you fully press the button before they are 0.5 seconds old. The 30fps is an assumption; I don't know what the framerate is in the R7 for pre-burst.

I've had this for years with the Casio EX-FH25; it shoots 9MP JPGs from a 10MP sensor with a vertical-only crop, and it can do this for up to 30 frames, at speeds up to 40fps, and the menu allows you to say how many come from before, and how many frames come after the full shutter press.

goalerjones wrote in post #19383691
The R7 is announced, and all of a sudden POTN is alive again

Yup I'm back lol
There was not enough chatter on R3/5/7 facebook groups so I came back here. Glad I did - quite knowledgeable members are bringing me up to speed on mirrorless behaviour and physics.

Lester Wareham wrote in post #19383768
I am trying to work out how well Canon and third party EF lenses AF will work with this camera, particular my Tamron 150-600, any ideas?

Also does anyone know if video invert MF assist is available with the R7?

I can speak for R5 and assume the same for R6/R7/R10.
No difference in AF performance of EF lenses using the adapter on these bodies.
I have not seen any degradation, at least for the Canon lenses.