PowerG9atBlackForest

PowerG9atBlackForest

Lives in Germany Germany
Works as a Pensioner
Joined on Apr 10, 2008
About me:

Canon G9
Olympus E-PM2, P12-35, O45, O60, O75, O40-150

Comments

Total: 128, showing: 1 – 20
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On Manfrotto launches miniature Lumie LED lights article (42 comments in total)
In reply to:

Mark McCormick: Lux is a value for illumination incident upon a surface. It means absolutely nothing as a product specification in this situation if we don't know what distance that surface is away from the light source. Are we talking six inches away from the light source, 1 foot, one meter, etc. I wouldn't be impressed at six inches. I would be impressed at one meter or more. This is a classic case of a corporate marketing department providing an incomplete specification.

To: papa natas
I'll give you one "^like" for that ;-)

Direct link | Posted on Mar 28, 2015 at 12:40 UTC
On Manfrotto launches miniature Lumie LED lights article (42 comments in total)
In reply to:

Mark McCormick: Lux is a value for illumination incident upon a surface. It means absolutely nothing as a product specification in this situation if we don't know what distance that surface is away from the light source. Are we talking six inches away from the light source, 1 foot, one meter, etc. I wouldn't be impressed at six inches. I would be impressed at one meter or more. This is a classic case of a corporate marketing department providing an incomplete specification.

It should read "Lumen".
"This is a classic case of a corporate marketing department providing an incomplete specification". I am glad you said it - I couldn't agree more. O, all these commercial, non-technical people, young trainees of great promise and jurists ;-))

Direct link | Posted on Mar 28, 2015 at 10:48 UTC
On Manfrotto launches miniature Lumie LED lights article (42 comments in total)
In reply to:

User5540745948: It looks nice, just to expensive. Any LED torch can do the same

Sam

The definition of CRI is defined by the International Commission on Illumination. There are exact regulations on how to calculate the value(s).
And yes, we have to rely on the manufacturers' data for today, as usual.

Direct link | Posted on Mar 27, 2015 at 21:20 UTC
On Manfrotto launches miniature Lumie LED lights article (42 comments in total)

DPR please note that "the light has a Color Rendition Index (CRI) of >92" not ">92%". Their site says <94. There is no such thing as percentage; though the maximum possible value is 100. There can be negative values of CRI as well.

Direct link | Posted on Mar 27, 2015 at 17:30 UTC as 2nd comment
On Manfrotto launches miniature Lumie LED lights article (42 comments in total)
In reply to:

Fredy Ross: thanks. I went to their site and it didn't tell me more. For example how to use them

Their UK site told me that they are readily available. Their service told me that they will be available in Germany by mid of April.

I haven't heard about the Relio (Italy) LED CRI=94 Lights since months now. So I am glad that these Lumies will be available in due time.

Direct link | Posted on Mar 27, 2015 at 17:21 UTC
On Manfrotto launches miniature Lumie LED lights article (42 comments in total)
In reply to:

Fazal Majid: The 92 CRI rating suggests these use Nichia 219 LEDs, which have more accurate color rendition than the more common and powerful CREE LEDs.

I hope they don't use PWM regulation circuits to do the dimming, otherwise the resulting flicker would render them useless for high-speed applications at anything but full output.

Their website says "without flickering"!

Direct link | Posted on Mar 27, 2015 at 11:58 UTC
On Manfrotto launches miniature Lumie LED lights article (42 comments in total)
In reply to:

User5540745948: It looks nice, just to expensive. Any LED torch can do the same

Sam

As a photographer, how can you possibly say that? For good colour rendition in photography, I consider a CRI- or Ra-value exceeding 90 essential. "Any LED torches" normally will have 75 or even less.

I also totally disagree with Aur who said "if someone recommends you a light based on CRI, run out the store and never come back". I'd rather say "if someone doesn't mention CRI or even doesn't know what is means, run out the store".

A high CRI or Ra is a sign of quality of the light source for still and video photography.

Direct link | Posted on Mar 27, 2015 at 11:45 UTC
In reply to:

Thorgrem: Great field test. Seems like m4/3 is up to the task of shooting such a difficult to shoot sport.

I do agree. Including: 60fps, C-AF, HighRes - all done very convincingly!

Direct link | Posted on Mar 24, 2015 at 13:37 UTC
On Video: DPReview panel at CreativeLive's Gear Day 2015 article (28 comments in total)
In reply to:

Malikknows: Excellent discussion. Reasonable people talking reasonably!

One quibble: On my version the audio didn't match the video. Lips moving at a different rate than the audio.

was allright with me.

Direct link | Posted on Mar 20, 2015 at 13:48 UTC
On Video: DPReview panel at CreativeLive's Gear Day 2015 article (28 comments in total)

DPR, your panel discussions are unrivalled. The way you look at the cameras, you take them into your hands and you talk about them, one can feel you really love them. Plus, what a wealth of information!

Direct link | Posted on Mar 20, 2015 at 12:56 UTC as 19th comment
On Adorama launches Flashpoint Ring Li-On 400ws ringflash article (55 comments in total)
In reply to:

daMatrix: Meh, it sounds great until I noticed a gap where they left out color temperature specs.

Having said what I said first-hand, the quality of the LEDs for video has still to be evaluated. Here and without further notes, anything can be possible ...

Direct link | Posted on Mar 14, 2015 at 15:48 UTC
On Adorama launches Flashpoint Ring Li-On 400ws ringflash article (55 comments in total)
In reply to:

daMatrix: Meh, it sounds great until I noticed a gap where they left out color temperature specs.

It's a true flash not a LED. You can expect their traditional color temperatures and usually very good color rendering indices. Of course, the values should be specified.

Direct link | Posted on Mar 14, 2015 at 11:57 UTC
In reply to:

maksa: It seems that won’t work in photography. Nanolens reflects falling beam for a particular angle, while in traditional lens the reflection angle depends on falling angle in any point of surface. As far as I understand, nanolens can focus only parallel beams, thus its use is very restricted.

Yes, and "three single wavelengths now instead of one". In nature, photographic light commands a steady, homogeneous distribution of quite a wide range of many wavelengths.

Direct link | Posted on Mar 11, 2015 at 11:36 UTC
On Sony Alpha 7S Review preview (463 comments in total)

Britt, you shoot with your left eye closed?

Direct link | Posted on Mar 2, 2015 at 16:44 UTC as 119th comment

Where can I put my mark on "I had it"?

Direct link | Posted on Feb 25, 2015 at 12:21 UTC as 63rd comment | 1 reply
On More things we found cut in half (CP+ 2015 edition) article (139 comments in total)

Covering the "open" side with a sheet of black paper (or a mirror) - would it be possible to use the other half then? Say for a half-format camera?

Direct link | Posted on Feb 15, 2015 at 15:43 UTC as 49th comment | 3 replies
On CP+ 2015: Canon shows 11-24mm in cross-section article (63 comments in total)

It would have taken 30mins in Photoshop to give the photograph an esthetical appearance by carefully removing all the white dust spots and reflections.

Photographic equipment sells better at auction sales when treated this way.

Direct link | Posted on Feb 13, 2015 at 15:35 UTC as 13th comment

Olympus Pen E-PL7?

Direct link | Posted on Jan 30, 2015 at 08:34 UTC as 6th comment
On Happy Holidays from dpreview article (125 comments in total)

"...whatever you say in your part of the world..."

We say "Frohe Weihnachten und ein gutes Neues Jahr!"

Direct link | Posted on Dec 25, 2014 at 21:17 UTC as 70th comment | 2 replies
On All-in-one: Ona Capri bag review article (168 comments in total)

Anyway, it's a well written review!

Direct link | Posted on Dec 7, 2014 at 14:27 UTC as 18th comment
Total: 128, showing: 1 – 20
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