Rishi Sanyal

Rishi Sanyal

DPReview Administrator
Lives in United States Seattle, WA, United States
Works as a Deputy / Technical Editor
Has a website at www.rishi.photography
Joined on Feb 25, 2014
About me:

Although I'm a scientist by training, having recently completed my Ph.D in biophysics, photography has always been a huge passion of mine. It's been an incredible opportunity to meld these two interests together here at DPReview!

Comments

Total: 4190, showing: 1 – 20
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On article Canon EOS 5D Mark IV First Impressions Review (764 comments in total)
In reply to:

Marcelobtp: Looks good, just hope that the canon colors have not stepped back with the DR extension.
The camera dual af is really a selling point, still i don't feel excited by the camera.
At least Canon does not have the strange habit of other companys like sony of introducing a feature that does not work as intented for professionals like 4k that makes the sensor overheats...

Extending dynamic range of the sensor has no effect on color.

Link | Posted on Aug 25, 2016 at 16:07 UTC
On article Canon EOS 5D Mark IV First Impressions Review (764 comments in total)
In reply to:

Kevin Knapp: Did I really just read a preview of the 5D Mark IV full of photos from the Mark III? Huh?

We haven't had the chance to shoot in the real world with the Mark IV yet, so, yes.

Link | Posted on Aug 25, 2016 at 16:03 UTC
On article Canon EOS 5D Mark IV First Impressions Review (764 comments in total)
In reply to:

James Booba: From someone whos interested in video ... 4K 1.74x crop. Aha.

Next news...

wt*f Canon are you kiddin me?

No I don't agree. But maybe that's because I live in Seattle? I also don't shoot hours on end; makes for pretty boring footage.

I also don't vastly prefer mirrorless over OVF.

Much the opposite, in fact. Time to reassess some assumptions? :)

Link | Posted on Aug 25, 2016 at 07:57 UTC
On article Canon EOS 5D Mark IV First Impressions Review (764 comments in total)
In reply to:

matthew saville: Do I detect an accidental caveat, that maybe AF isn't as good in AI-Servo as it is in One-Shot, when *not* using live view? Or is that just how all cameras are measured, like a CIPA standard or something...

(I ask because, though a Nikon shooter, I review camera gear and shoot weddings with all kinds of gear for those reviews, and so far I've definitely felt that as someone who prefers to just leave the camera in continuous focus mode much of the time, Nikon has treated me better lately.)

Not accidental at all :)

Nikon has treated you well, yes, not hard to believe. That's one of our points actually.

But Canon Servo can be very situation-specific in performance, and not *just* with respect to subject tracking, unfortunately, but also *because* of its predictive Z tracking algorithms (which can be further confused by the poor subject, or X-Y, tracking algorithms).

Link | Posted on Aug 25, 2016 at 07:50 UTC
On article Canon EOS 5D Mark IV First Impressions Review (764 comments in total)
In reply to:

studiopwp: No mention of ISO performance. Can we conclude there is no improvement, or even worse than the 5DIII? Also no mention of the highly anticipated return of the red illuminated AF points. Slightly underwhelmed, might go for the 1DXII after all

1/3EV? Are you familiar perchance with the concept of ''margin of error"?

Also, check DXO's color sensitivity data, not just their SNR 18 (green channel) data.

Link | Posted on Aug 25, 2016 at 07:40 UTC
On article Canon EOS 5D Mark IV First Impressions Review (764 comments in total)
In reply to:

James Booba: From someone whos interested in video ... 4K 1.74x crop. Aha.

Next news...

wt*f Canon are you kiddin me?

The a7R II also doesn't overheat in 4K for reasonable record times (30 min), unless you're in very hot weather.

Link | Posted on Aug 25, 2016 at 07:33 UTC
On article Canon EOS 5D Mark IV First Impressions Review (764 comments in total)
In reply to:

Greg VdB: 1D x II, check. 5D Mark IV, check. Great, that's the pro's needs covered. Now, wouldn't the 6D's update, aimed at enthusiasts, be the perfect candidate to become Canon's first FF mirrorless? Give it a 24~28 MP dual pixel sensor, a swivel touchscreen, and a body slightly larger than the a7 line for good ergonomics (+ larger battery and heat sink), and see what happens. At the 6D's pricepoint, I think that would soar.

(I fully expect the anti-Canon fanboys to jump on this with fervour, so just to reiterate my main point: isn't the target audience of the 6D line the perfect FF mirrorless crowd in Canon-land?)

Yeah Greg, agreed.

You need to label it something different so pros don't *expect* the same behavior as their previous DSLR.

And of course expected alignment with previous ways of working may have little (or a lot) to do with resultant benefits. :)

You have an interesting point though: start with the 6D's replacement as the switch-over.

Yeah, I can see that as a potentially good strategy...

Link | Posted on Aug 25, 2016 at 07:32 UTC
On article Canon EOS 5D Mark IV First Impressions Review (764 comments in total)
In reply to:

pekr: So non impressive tracking abilities, apart from DPAF (Live View). And yet no swivel LCD screen. And Canon claims, they listen to their audience? So we've been waiting 4 years to get this? If the 6D II does not see the swivel screen, we will better wait fro 90D or get much cheaper 80D.

I don't think Canon's going to get anywhere near Nikon-esque subject tracking capabilities until they finally decide to scrap their entire (viewfinder) PDAF system and start from scratch.

Which is probably what they've done with Dual Pixel AF which, oddly enough, shows huge subject tracking benefits, and a lack of the insanely front-focused errors we've noted with the [1D X II](https://www.dpreview.com/reviews/canon-eos-1d-x-mark-ii/10#ExpandAFFail) and [5DS/R](https://www.dpreview.com/reviews/canon-eos-5ds-sr/6#ExpandAFFail).

Our best guess is that many of these errors result from a failure of the predictive algorithms which, probably, don't need to be so 'predictive' in an era of high sampling rate, where you can just be 'responsive'. Furthermore, Canon's continued reliance on distance information for subject tracking is likely hurting them, compared to proper pattern matching off image sensors (like the metering sensor) for proper subject recognition and tracking.

Link | Posted on Aug 25, 2016 at 07:06 UTC
On article Canon EOS 5D Mark IV First Impressions Review (764 comments in total)
In reply to:

Greg VdB: 1D x II, check. 5D Mark IV, check. Great, that's the pro's needs covered. Now, wouldn't the 6D's update, aimed at enthusiasts, be the perfect candidate to become Canon's first FF mirrorless? Give it a 24~28 MP dual pixel sensor, a swivel touchscreen, and a body slightly larger than the a7 line for good ergonomics (+ larger battery and heat sink), and see what happens. At the 6D's pricepoint, I think that would soar.

(I fully expect the anti-Canon fanboys to jump on this with fervour, so just to reiterate my main point: isn't the target audience of the 6D line the perfect FF mirrorless crowd in Canon-land?)

Yes, I agree with you 100%, save for the minor (major?) point that there *are* pros who *aren't* sports shooters who'd benefit from Dual Pixel AF's (DPAF) reliability and subject/face tracking and, therefore, a mirrorless FF Canon camera with DPAF.

Link | Posted on Aug 25, 2016 at 06:58 UTC
On article Canon EOS 5D Mark IV First Impressions Review (764 comments in total)
In reply to:

2JoeA7R2: DPR: 1st line in article 'must' should be most.

Thank you; fixed.

Link | Posted on Aug 25, 2016 at 06:55 UTC
On article Canon EOS 5D Mark IV First Impressions Review (764 comments in total)
In reply to:

cgarrard: Great intro article. :) Well done as always...

Being very nitpicky I'd say "with the exception of the Canon EOS 6D ...then the following : Canon DSLRs prior to the 1D X Mark II and 80D were known for poor shadow recovery, due to high levels of read noise."

The 6D has excellent shadow recovery and no banding :)

"While the total DR isnt as good as the 80D, the image quality of the 6D is still better when you count other factors such as noise and color retention at each ISO level. Simply in a different league."

You'd *expect* better image quality due to the larger sensor size.

The point is you don't get *anywhere near* that benefit of a full-frame sensor in terms of low ISO dynamic range because of the lack of on-chip ADCs.

Your link compares high ISOs, where the total DR is *irrelevant*.

We're talking about shadow pushability at low ISOs, which is an entirely different matter, and where the 6D fall behind even the smaller sensor 80D, and far, *far* behind the [Nikon D750](http://bit.ly/2bHxMXv).

So, I'm not sure what your overall point is, but the reality is this: the Canon 6D is *far* behind its peers with respect to low ISO dynamic range and general shadow recoverability.

Link | Posted on Aug 25, 2016 at 06:48 UTC
On article Canon EOS 5D Mark IV First Impressions Review (764 comments in total)
In reply to:

CameraLabTester: Bravo to Canon and it's DSLRs!

Canon is truly the undisputed King! ... of Incremental upgrades!

The next 5D series you will really want is actually about 3 or 4 upgrades away...

Great going Canon!

.

"Some manufacturers come up with more dramatic upgrades because they are starting with designs that leave a lot of room for improvement, such as those with weak lens mounts, shutter shock, mediocre ergonomics, mediocre menus, corrosion issues, etc."

Yup. Totally agreed. Sometimes they even make ergonomics *worse*...

"Oh gosh, a joy stick would be a good addition" --> Which really makes you wonder: why does Canon *disable* their own AF joystick by default? Or cripple their own Exposure Comp button on the 1D X series by hobbling it in M(anual) mode, having it control aperture *just in case* you hate the big jog dial - which literally *everyone* I've spoken to loves?

Just remember: no one's perfect.

Link | Posted on Aug 25, 2016 at 06:37 UTC
On article Canon EOS 5D Mark IV First Impressions Review (764 comments in total)
In reply to:

James Booba: From someone whos interested in video ... 4K 1.74x crop. Aha.

Next news...

wt*f Canon are you kiddin me?

I believe it's 1.64x crop.

Link | Posted on Aug 25, 2016 at 06:27 UTC
In reply to:

Nikita66: Kind of surprises me that sunstars are "revered." They appear contrived to me, unnatural.

They're not any more 'revered' than shallow DOF is 'revered'. They're just an aspect of the lens some care about that we can comment on right now, today, and so we did.

Link | Posted on Aug 25, 2016 at 06:24 UTC
On article Canon EOS 5D Mark IV First Impressions Review (764 comments in total)
In reply to:

Thingsinlife: Let the show begins!

"Already dpreview is on song with noticeable negativity about realtively (sic) minor things."

Like lots of completely out-of-focus shots?

"I think only DPAF truly impresses them."

Perhaps that's because it tends to address the whole 'lots of completely out-of-focus shots' thing mentioned above...

Link | Posted on Aug 25, 2016 at 06:14 UTC
On article Canon EOS 5D Mark IV First Impressions Review (764 comments in total)
In reply to:

rrccad: typo:

"The Dual Pixel AF sensor essentially splits all of its 60 million pixels in half, "

I think you meant 30 million pixels in half :p

Corrected; thanks rrccad.

Link | Posted on Aug 25, 2016 at 06:10 UTC
On article Canon EOS 5D Mark IV First Impressions Review (764 comments in total)
In reply to:

R N: "we'd expect"... These statements in the absence of data are worthless. "we'd expect" DR will still lag behind... Based on what evidence?

"we'd expect" that coming from DP Review though, wouldn't we? I do have data for this last statement: the text of the preview itself.

Based off of our analysis of the 1DX II and 80D, yes, this is exactly what 'we'd expect'.

Considering those cameras were released this very same year, our *informed opinion* is that we don't expect any leapfrog improvements, especially considering the only source of a large improvement we would have expected from Canon was by going to on-chip ADCs.

Which the 1D X II and 80D did. Hence, we're basing our, again, *informed opinion* off of the benefits we've noted with those cameras going to on-chip ADCs.

Make sense?

Link | Posted on Aug 25, 2016 at 06:09 UTC
On article Canon EOS 5D Mark IV First Impressions Review (764 comments in total)
In reply to:

cgarrard: Great intro article. :) Well done as always...

Being very nitpicky I'd say "with the exception of the Canon EOS 6D ...then the following : Canon DSLRs prior to the 1D X Mark II and 80D were known for poor shadow recovery, due to high levels of read noise."

The 6D has excellent shadow recovery and no banding :)

@bronxbombers4 is correct: shadow recovery is intimately and inextricably linked to base ISO DR.

The 6D is right alongside the 5DS/R in terms of base ISO DR. The 1DX II and 80D have considerably better shadow recovery/low ISO DR, so, no, the 6D is not an exception. The fact that it's a bit better than the 5D3 says more about how poor the 5D3 was... and it was poor. Really poor. I've shot tens of thousands of images with the 5D3 and I would rarely, if ever, push anything beyond 2 stops. Even then, sometimes I'd encounter noise.

I'd even encounter noise with the 5D3 just by enabling 'vignetting' connection on fast primes...

Link | Posted on Aug 25, 2016 at 06:05 UTC
On article Canon EOS 5D Mark IV First Impressions Review (764 comments in total)
In reply to:

studiopwp: No mention of ISO performance. Can we conclude there is no improvement, or even worse than the 5DIII? Also no mention of the highly anticipated return of the red illuminated AF points. Slightly underwhelmed, might go for the 1DXII after all

"Both the 80D and the 1DX Mkii sensors exhibited a reasonable increase in ISO performance."

No, they showed [no benefit whatsoever](http://bit.ly/2bjNJVQ).

Link | Posted on Aug 25, 2016 at 06:00 UTC
On article Canon EOS 5D Mark IV First Impressions Review (764 comments in total)
In reply to:

bronxbombers4: Hmm dualpixel AF great for when it works, but when it doesn't STILL no 100% view focusing box. Still no zebras. Good grief Canon those a basic LOW end usability features not some high end crazy stuff.

HDR video sounds awesome but it only works in a waxy, blurry sub-1080P 1080P mode.

4k has no LOG profile!? And is it is a sharp and natural as the over-sampled Sony video of a year ago?

Video is a big step up but it feels like it's already partly behind and might be well behind in just another 12 months.

No special fast more efficient compression for 4k is a shame, maybe it would heat up the body, but sometimes you only need to shoot a few minutes at a time, for nature stuff for instance, for much stuff actually, and would rather deal with the heat than the big files.

I could see the 5D5 finally getting video all correct. But man another 4 years out.

"And is it is a sharp and natural as the over-sampled Sony video of a year ago"

Doubtful particularly when you consider that Canon's JPEG sharpening engine - which I believe is what is used for video - simply isn't anywhere near as sophisticated as Sony's. We'll have to check if you can tweak this for video. And that's before you get to the whole oversampling bit - which Canon isn't doing.

So, yes, an a6300 will have considerably sharper 4K. Heck, even a RX100 IV probably has sharper 4K. But given how much detail 4K has to begin with, I'm not sure any of this would be my biggest concern.

4K Frame Grabs, though, will suffer from the large radius clumsy sharpening combined with the clumsy noise reduction that gives you [this](http://bit.ly/2bjMRQZ) (look at the texture, or lack thereof, of the hair on the buffalo).

I hope Canon iterates its JPEG engine.

All this said, I'd pick Canon Dual Pixel AF with a touchscreen for tap-to-focus any day over Sony's focus implementation...

Link | Posted on Aug 25, 2016 at 05:55 UTC
Total: 4190, showing: 1 – 20
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