Richard Butler

Richard Butler

DPReview Administrator
Lives in United Kingdom Seattle, United Kingdom
Joined on Nov 7, 2007

Comments

Total: 5134, showing: 41 – 60
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In reply to:

NiteoLux: It seems that the report by DPReview about what trolls take as a "lack" or an "absence" of dynamic range in the Canon 6D Mark II is MOSTLY noise. It is known that dynamic range is one among many factors to be taken into account when evaluating performance or image quality of cameras. Trolls used the article to unfairly bash the Canon brand and its users. For some people this was the end of the world. They freaked out and screamed the sky is falling!! Canon is sinking below and backwards! Let's all jump the ship!! Well, not so. Stop and take a breath. Look again and think for yourself. Don't make judgments based on a single fraction of a bit of information. Look at the whole thing. Look for all the reliable information and verifiable facts. More complete reviews of the Canon EOS 6D Mark II are starting to appear. Consider only complete and reliable facts before making a judgment or characterization. I put my money were my mouth is. I own the Canon 6D and I'll buy the 6D Mark II.

Dynamic Range is the range of tones that a camera can capture, limited at the upper end by clipping and at the lower end by the noise reaching an unusable/unacceptable level (which is why different sites quote different numbers: they use different thresholds for the tolerable noise level). DR and noise are not distinct properties.

You're right to say that DR is only an aspect of image quality and, similarly, image quality is only one aspect of a camera as a whole, albeit a fairly significant one.

However, you're wrong to put the words lack or absence in quotes. It's an objective fact that the 6D II has less dynamic range than most of its peers. How much this matters to you is a legitimate question, but whether it's the case isn't.

Link | Posted on Aug 2, 2017 at 17:36 UTC
On article Blackmagic Video Assist 4K review (24 comments in total)
In reply to:

left eye: What are it's refresh rates?

Importantly when fed 4K/24fps or 4K/25fps can it run at 4K/48Hz or 4K/50Hz.

DPR whenever you review an external monitor please include this information, otherwise to me at least the review is worthless; supported Hz should point A of the review.

I'm fed up of having to use 30/60Hz monitors that are forced to use pull-down with 24 or 25fps footage - resulting in juddery playback.

I'll see if I can get an answer to that.

Link | Posted on Aug 2, 2017 at 17:13 UTC
On article Blackmagic Video Assist 4K review (24 comments in total)
In reply to:

cartic: Forgive my ignorance. Can I use a 1080p camera to capture 4k video with this monitor?

I'm afraid not. All this does is capture the signal fed out by your camera. This has the advantage that it hasn't been heavily compressed by your camera yet (and in some cases, may include more colour information than the files captured by your camera), but it can't up-res.

Link | Posted on Aug 2, 2017 at 17:12 UTC
In reply to:

9mm: DP, would it be possible to focus also on highlights and then count the DR steps. How you know the DR without checking the other end? What SW did you use to get best results? Nikon fans like to choose one feature and judge the whole system. DR is not just the dark.

Our tests assume that most manufacturers leave a similar amount of the Raw file for highlight headroom. This isn't a perfect assumption and we'll be making sure our next-generation test is more rigorous in this respect.

However, if you analyse the Raw files of the Nikon D750 and Canon EOS 6D II, you'll find that the brightest (non-specular) tone in each image is within 1/3EV of clipping. The Nikon is around 0.1 further from clipping, so will have an indiscernible advantage in terms of highlight capture.

The point is that DR is the distance from clipped white down to an unacceptable level of noise, so all DR tests are essentially noise tests, if you choose to see it that way. The Canon 6D II's images will be noisier if you have to pull detail from darker regions into the image (it's not about 6EV pulls: that's just a way of seeing what happens in the shadows, using a test scene with limited DR).

Link | Posted on Aug 1, 2017 at 19:16 UTC
On article Fujifilm GF 110mm F2 sample gallery (153 comments in total)
In reply to:

SmilerGrogan: Great lens. But the wet dog on the beach, sections of the fur on its head look iridescent. Is that moiré, my monitor, some other artifact, or is the dog from outer space?

We believe the microlenses on the GFX 50S are designed so that they don't quite reach the edges of the pixels. This increases sharpness, by ensuring pixels are distinct but also risks these false colour anywhere that the detail is on a sub-pixel scale (my assumption is that these are minuscule water droplets reflecting brightly on single pixels).

Well spotted, though.

Link | Posted on Jul 26, 2017 at 21:57 UTC
On article Fujifilm GF 110mm F2 sample gallery (153 comments in total)
In reply to:

pictureAngst: So given APS-C and smaller format reviews typically include 'equivalent depth of field' in relation to FF (e.g APS-C f2.0 = FF f2.8, etc.) is this MF f2.0 lens equivalent to FF f1.4...?

(I'm not talking about light gathering and exposure, just DOF).

Bingo!

And the difference is visible if you consider the effect on the whole image, rather than worrying about the pixel level (which again is the difference between considering at light per unit area and light per whole image).

Link | Posted on Jul 26, 2017 at 19:45 UTC
On article Blackmagic Video Assist 4K review (24 comments in total)
In reply to:

M Chambers: What advantages does this have over a prosumer video camera?

Many people who read this site don't own (or want) a prosumer video camera and might, instead, want to make the most of what their existing large sensor camera and lenses can do.

Link | Posted on Jul 26, 2017 at 17:43 UTC
On article Fujifilm GF 110mm F2 sample gallery (153 comments in total)
In reply to:

Mateus1: Colour rendering is great, you will not get such natural looking colors from X-Trans that look artifical and unnatural. The answer is simple: GXF and X-A3 on some pictures here have Bayer cfa, not X-Trans.

Also, most people's concerns about X-Trans are around detail rendering, not colour.

Link | Posted on Jul 26, 2017 at 17:21 UTC
On article Blackmagic Video Assist 4K review (24 comments in total)
In reply to:

knoxphoto: For what the device is, and for the reduced price it's selling at, it's a good buy. I would choose the Atomos over it any day of the week VS the BMVA4K at it's full retail price. I've been using a BMVA4K for a month, it can feel like you are testing a product that's not completely finished, it has some quirks, it will occasionally baffle you... but it records beautiful video in 10-bit Pro Res onto "cheap" SD cards via your camera's HDMI out line.

The short life of the batteries is annoying, but not a deal breaker, I got 8 generic LP-E6 batteries for under $100 and they work fine, I keep the chargers going during filming. The 2 biggest annoyances to me are the (1) battery life indicator, which is a guess not a exact estimate (it changes based on your settings while shooting). (2) The image quality seems to be contingent on the cleanness of the HDMI line out, I got different IQ results from different cameras I tried, some good - some bad.

I recommend getting the Smallrig cage for it!

That's a useful perspective, thank you.

Sadly it looks to me like the Blackmagic Design summer sale has already ended (or, at least, I couldn't find the reduced price being offered anywhere). Hard to see it as a $900 device once you've seen it sold for significantly less.

Link | Posted on Jul 26, 2017 at 17:18 UTC
On article Blackmagic Video Assist 4K review (24 comments in total)
In reply to:

Savannah0986: "nor can it shoot the wider-screen DCI flavor of 4K"
Can it actually "shoot" anything? It's not a camera, now is it?
S.

Quite right. Sorry about that.

You can't shoot DCI 4K while using it but, as you say, it can't shoot anything.

Link | Posted on Jul 26, 2017 at 17:16 UTC
On article Fujifilm GF 110mm F2 sample gallery (153 comments in total)
In reply to:

pictureAngst: So given APS-C and smaller format reviews typically include 'equivalent depth of field' in relation to FF (e.g APS-C f2.0 = FF f2.8, etc.) is this MF f2.0 lens equivalent to FF f1.4...?

(I'm not talking about light gathering and exposure, just DOF).

The crop factor for this camera is 0.79x, so this lens is equivalent to an 87mm F1.6, in terms of DOF **and** total light gathering (though, as you say, not exposure).

Link | Posted on Jul 26, 2017 at 17:03 UTC
On article Leica TL2 first impressions (368 comments in total)
In reply to:

solarider: Mike Johnston over at TOP says the TL2 is a copy of the Japanese NEX 7. Hows that for turnabout?

That's an, er, interesting assessment.

Link | Posted on Jul 25, 2017 at 17:17 UTC
On article Sony a9 Full Review: Mirrorless Redefined (2730 comments in total)
In reply to:

Average User: I am getting really confused. Maybe you can help by explaining Sony's thinking in leaving out S log 2 and S log 3 and related features. They do have it in the A6500. Especially ironic because now Canon has decided to include their version of it in the 5D Mk4, whereas, not before.

That's something we absolutely can't explain. As you say, they offer it across much of the rest of their range, yet not on the a9.

I guess it'll be interesting to see whether a9 remains alone as a flagship model (per a900 and a99) or whether it does get a more video-focused a9S sister.

Link | Posted on Jul 25, 2017 at 17:09 UTC
On article Ten things we're hoping for from the Nikon D850 (476 comments in total)
In reply to:

ChrisDM: You didnt mention the number one thing on my wish list: Built in SB-5000 transmitter/control. You have to attach a separate controller module to the D5 and D500 cameras because of the fact that Nikon did not build a transmitter into the SB-5000 itself. Every other brand of major (and minor) radio controlled speedlights on the market have built in transcievers, so it is very frustrating that the SB-5000 doesnt. This would be forgiven if one was built into the D850.

We did discuss that as a possibility and agree it'd be nice. I guess it's a question of what proportion of owners Nikon think will use flash: is it enough to make all users have to pay for the feature or are they better-off selling an accessory to those who need it?

It'll be interesting to see.

Link | Posted on Jul 25, 2017 at 15:19 UTC
In reply to:

Village9991: what if this kind of test is not correct? Sensors have more information in the highlight are than in the dark one so you can get better (much better) images DARKENING digital images instead of LIGHTENING. so exposing to the right let you obtaing much better images. It would be interesting (for me instead) this kind of test.

It looks a lot to me like your 'overexposed' image has only clipped white regions, so you won't notice if they're unrecoverable. Everything else in the scene is within the camera's dynamic range and is cleaner because you've given it more light.

From what you've presented, that doesn't demonstrate anything about highlight DR. All you appear to have shown is that you get optimal noise performance by exposing to the right.

Link | Posted on Jul 24, 2017 at 17:23 UTC
In reply to:

Cswitch: Maybe 5DIV sales are not as high as expected ...
To cripple the 6D II sensorwise might be a way to "convince" potential buyers to purchase the (outside US too expensive) 5DIV

Given the decision over the chip would have been made long before the 5D IV hit the market, it's fairly safe to say that, whatever Canon's thinking was on this, it has nothing to do with 5D IV sales.

I also think it's supremely unlikely that Canon chose this chip with the aim of *limiting* DR: it's far more likely they decided to iterate on an existing design, concluding that people had seemed happy with it, previously.

Link | Posted on Jul 24, 2017 at 00:38 UTC
In reply to:

Robemo: Can DPR please give the RAW file of the beach scene?

I'm really sorry about that. Looks like I missed the 'http://' off the beginning of the link. It should now be fixed.

Link | Posted on Jul 24, 2017 at 00:33 UTC
In reply to:

Mais78: wow, I sold my 6D to upgrade but the Mk II seems even worse in the noise department. I regret selling.

It's true, you can add more noise reduction and hide the issue.

Bill's data is taken from different images than the ones we present and, so far as I know, are processed using different software. His findings our consistent with what we're seeing.

Link | Posted on Jul 24, 2017 at 00:26 UTC
In reply to:

AwkwardSwine: In Seattle you can see Dunkirk in full 70mm at the Cinerama. In fact they have a full roster of classic 70mm films playing this summer.

https://www.cinerama.com/News/May-2017/Cinerama-to-show-Christopher-Nolan-s-Dunkirk-in-70.aspx

AwkwardSwine - I think you're both describing the same thing. The second image down in the infographic *is* 70mm, which means it's cropped, relative to the 1.43:1 ratio it was shot in.

Link | Posted on Jul 22, 2017 at 01:47 UTC
In reply to:

Robemo: Can DPR please give the RAW file of the beach scene?

I've added a link in the caption.

Link | Posted on Jul 21, 2017 at 22:51 UTC
Total: 5134, showing: 41 – 60
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