RobertMartinu

RobertMartinu

Lives in Austria vienna, Austria
Joined on Jan 17, 2006

Comments

Total: 18, showing: 1 – 18
In reply to:

dynaxx: Interesting and informative article ; thanks to you DPR.

I have read the comments and I have had it up to here ( gestures hand to eyebrow level ) with people writing that despite inferior measurements of almost everything measurable in a sensor that it still takes "gorgeous" photographs.

The raison d'etre of this site is to minimise the subjective and maximise the objective and I now believe that DPR is making a much better job of doing this. In particular, the SMI measurement of colour reproduction accuracy will, I hope, silence those arrogant folk ( like Ken Rockwell ) who keep throwing out comments like "I don't like the Sony/Olympus/etc. colours". It is a biological fact that everyone sees different colours.

And, Rishi, if you can dream up a unit of measurement that will silence the "but the Raws are compressed" sheep then you will remain my friend for life.

I'm afraid accurate measurements of color rendition won't have an impact on the taste debate - mainly because they're about two different things. SMI or similar metrics tell me how many shades of color the camera can differentiate, how good my starting point for post processing in a properly calibrated toolchain is.
The "I don't like that brands colors"-fraction otoh is preoccupied with the way how the camera does something for them that their own presets could (and should) do. Most likely better, as the custom solution doesn't have to encompass the same wide range as the camera defaults.

Direct link | Posted on Jul 11, 2015 at 04:22 UTC
On Sony a7R II has 42.4MP on full frame BSI CMOS sensor article (1268 comments in total)
In reply to:

Franka T.L.: Well Samsung NX1 and now A7R-II VSI finally made it big ( literally ) .. really its quite an achievement by both of the S teams .. can't wait to see how well the BSI would work out on this sensor. Canon really can feel the heat now I would wager

Well, neither the 40-80 nor the75-150 are f/2.8 but that doesn,t stop them from being hot contenders for the title of best (AF) zoom...
Or I make use of that focus peaking and go for the cz.2 trinity.

Direct link | Posted on Jun 10, 2015 at 18:51 UTC
In reply to:

ProfHankD: Automatically return to the preset hyperfocal point? Well, that's lame.

I was expecting the camera to do something like automatically find the hyperfocal point given a set of things that you indicated you want in focus (easy to do with a touch screen). A number of cameras already do things like that, for example, recognizing faces and automatically finding the focus and aperture settings needed to get all recognized faces in focus.

It sounds like what HAP-1 implements is just a focus memory position per lens. They should at least allow setting several focus memory points so that one could quickly pull focus between different objects in a studio setup, etc.

If you read Phase One's description of HAP-1 you'll get the actually interesting bits. Like the AF pattern being not that rigidily defined anymore.

Direct link | Posted on Jun 2, 2015 at 23:36 UTC
In reply to:

DenisBBergeron: Looking at the lenses sheet (greatest DOF control is with 80mm f2.8) and the sensor size (1.5x linear of a 35mm).

I wonder what have the greatest DOF control and MP between this and an (know to come) A7RII (with IBIS multiple shot high MP) with a 85mm f1.2 for a still live poster?

As a function of lens and sensor the A7 would win. But then you should factor in subject related factors and you'll most likely bump into different limits.

Direct link | Posted on Jun 2, 2015 at 23:25 UTC
In reply to:

noflashplease: Since the appearance of the Nikon D800 back in 2012, it has been increasingly difficult to justify the existence of the medium format camera segment. The Pentax 645Z is the only semi-sane medium format market entry, and even then, it is going to be pitted against a full-frame Pentax DSLR.

From a purely practical POV: For me the leaf shutters alone paid for the Phase One within a year. The Pentax, or 5Ds/r, otoh would come with a serious price premium over the baseline set by the D8x0.

Direct link | Posted on Jun 2, 2015 at 22:33 UTC
In reply to:

SmilerGrogan: Sorry to be so thick, but what about in live view? The mirror is already up, right? So does that make a difference?
And also, what about portraiture? I typically hold the button down for at least 10 exposures at a time. I don't use a VR lens for people shots, but I'm curious how does VR react when shooting in bursts?

The A7r has it's own share of shutter shock softness - and there the mirror is obviously not the culprit.
Time for global electronic shutters, properly designed they'd make life so much easier.

Direct link | Posted on Apr 17, 2015 at 17:09 UTC
On Relio is a powerful LED light in your pocket post (26 comments in total)
In reply to:

jpfaria: Dudes!
There are some awesome led torches that can do thetrick for lessthen a quarter of that price
http://www.amazon.co.uk/Led-Lenser-A5-High-Torch/dp/B00ATYJ49U/

You can go with LED replacement bulbs - they're surprisingly consistent in terms of color temperature. You can get even ones with good color rendition and the 12V ones can be powered by batteries.

Direct link | Posted on Dec 11, 2014 at 20:59 UTC
On Canon EOS 7D Mark II First Impressions Review preview (2696 comments in total)
In reply to:

rickpoole: Can anyone explain this difference - looking at DPReview's samples there is not much improvement in noise going from the 7D at 6400 to the 7D2 at 6400. But, the samples at Imaging Resources show a very noticeable improvement in the 7D2 at 6400. They claim their images are JPEGs straight from the camera with no noise reduction or other processing. Are the JPEGs still being processed even with everything "turned off" or did one of these two sites not do their tests correctly?

Shadow noise: That sensor gives you two half signals from the split photo diodes - if the noise of the read noise remains constant recombining them reduces it's effect by about 1/3 overall magnitude.

Direct link | Posted on Oct 25, 2014 at 12:45 UTC
On 'See Impossible': Canon counts down to... something. article (1656 comments in total)
In reply to:

Frank Hoff: isn´t it time that some journalist.. ask a few honest questions?

All interviews with canon executives are lame and nobody dares to really point the finger where it hurts.

When someone like that canon guys says "we make the best sensors" why is nobody asking if he is joking? :)

No honest... why not asking if he is serious?

You have to figure cultural conventions in - in a world based on politeness judo that certain question in the photokina14 interview was about as "subtle" as you can get without being charged for at least battery or so.

Direct link | Posted on Oct 7, 2014 at 19:58 UTC
On Canon EOS 7D Mark II First Impressions Review preview (2696 comments in total)
In reply to:

Ton Jelsma: Very disapponted. I now own a 70D with touch screen and excellent and easy video performance!

Guess Phase One is for clueless amateurs only then...

Direct link | Posted on Sep 15, 2014 at 19:23 UTC
In reply to:

OceanFroggie: Nice camera wrong mount. If the non canikon also rans produced stunning cameras like this with either the Canon or Nikon mount they would sell more bodies.

the TS-Es are great - but they're even better when in front of an A7r.
ATM Canon benefits from market inertia. But how long that will last? Or worse: it's reversal would be quite expensive to overcome. For slow photography the adapters open a nice door, and for action...a A77+some native/3rd party lenses would be in the same price region as a 5D3, not to mention 1Dx, as it seems. Once people do the math the will turns...
I'd miss the RT system though, legoing some cactus V6 and Odin makes a less elegant solution..

Direct link | Posted on May 2, 2014 at 03:49 UTC
On 1939: England in Color (part 1) article (222 comments in total)
In reply to:

BaldCol: Thanks for sharing. Very interesting.

Will future generations be finding hard drives in thier attics?

Perhaps they'll find data on some social media/cloud storage account that they got access to despite countless service provider aquisitions and such.
And they'll wonder why current sensors had the samecharacteristis and limitations as ancient color material. Or how they managed to run instagram on completely analog cameras&film.

Direct link | Posted on Apr 25, 2014 at 09:12 UTC
On Can computer corrections make simple lenses look good? article (163 comments in total)
In reply to:

pulsar123: There is always a catch. With deconvolution, one of the catches is increase in the noise level (because noise scews up the deconvolution, which assumes perfect, noise free signal).

You can only subtract noise that occurs in the camera. Noise already there in the signal to be sampled can't be suppressed because it follows no rules, only longer exposure helps here.

Direct link | Posted on Oct 1, 2013 at 20:48 UTC
On Preview:canon-eos-70d (1311 comments in total)
In reply to:

CarVac: I like the improved noise floor. Impressive that they managed that with an effectively 40-mp sensor (though my suspicions are that small pixels don't actually hurt read noise)

Its the combining stage. The best way to avoid random noise is to take lots of measurements and average the results. While 2 samples isn't really a lot its about sqrt(2) better then just one.

Posted on Aug 7, 2013 at 11:20 UTC
On Fotodiox announces LED-based DY-200 Fresnel Lights article (10 comments in total)
In reply to:

Debankur Mukherjee: the future of studio lights will be LED.......

You can always look for Arri - the L7 have a CRI 95+, similar to all those discharge lights.
Boils down to budget, how much is the convenience worth to you, or are there technical requirements that can't be met otherwise? CRI 85 seems to work for quite a lot of people.

Direct link | Posted on Jun 14, 2013 at 11:05 UTC
On Final Moments in the Noise challenge (2 comments in total)

Yes, in a rather dark environment. With available light only you'd get a completly black frame.
With flash as your only source of illumination shutter speed doesn't matter. You open the shutter, do whatever has to be done and then close it again.
That way you get around the shutter delay.

Direct link | Posted on Oct 17, 2009 at 14:43 UTC as 1st comment
On Moment of Impact in the Noise challenge (4 comments in total)

How did you get the timing right?
Lots of attempts, pure luck or something more elaborate we should be aware of? :)

Direct link | Posted on Oct 17, 2009 at 01:06 UTC as 3rd comment
On Spot The Error in the ## science ## challenge (1 comment in total)

Was this supposed to be an physics or a math assignment? Would make it easier to figure out what went wrong! As in "there is a difference between assignment and equality" :)

Direct link | Posted on Oct 6, 2009 at 06:24 UTC as 1st comment
Total: 18, showing: 1 – 18