RobertMartinu

RobertMartinu

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

Comments

Total: 12, showing: 1 – 12
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 (2709 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 (1669 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 (2709 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 (221 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 (162 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: 12, showing: 1 – 12