Luke Kaven

Luke Kaven

Lives in United States New York, United States
Works as a Researcher/educator, music producer, photographer
Has a website at http://www.lukekaven.com
Joined on Mar 11, 2004
About me:

Researcher/ Educator
President at Smalls Records | www.smallsrecords.com
Featured artist in the HDRI Handbook by Christian Bloch (2nd Ed)

Comments

Total: 121, showing: 1 – 20
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In reply to:

dgeugene1: Why would dpreview publish this unless it was meant as satire? Very sad.

It was explicitly tagged as "humor" as you can see above. And what else would it be?

Direct link | Posted on May 2, 2015 at 17:07 UTC
In reply to:

jon404: ***** Five-Star Article!
Thanks, Richard. Your writing is so clear and informative... VERY much appreciated.

This article continues a trend favoring editorial quality in the last couple of years. I especially appreciate the fact that in this case you did not attempt to oversimplify a subtle scientific and technical issue, and in doing so, you've done a great service to your readers.

Direct link | Posted on Apr 28, 2015 at 10:54 UTC
On ISO400_WH_26 photo in dpreview review samples's photo gallery (1 comment in total)

DPR! You got some mojo going with some of those B&W portraits. You should let your hair down more often in the samples galleries!

Direct link | Posted on Apr 11, 2015 at 20:52 UTC as 1st comment
In reply to:

Battersea: Homage? Seems the correct word should be parody.

Those mischievous rapscallions!

Direct link | Posted on Apr 10, 2015 at 06:48 UTC
On Nikon D5500 Review preview (326 comments in total)

Quick spelling catch in the conclusion section: "comprises" -> "compromises"

"While there were certainly comprises made to separate the D5500 from the D7200, most users in the former's target audience should be able to 'get by' without them. "

Direct link | Posted on Apr 2, 2015 at 20:01 UTC as 71st comment | 1 reply
On Nikon D7200 real-world samples gallery posted article (150 comments in total)

The lack of fixed pattern noise appears to be a noticeable improvement over the D7100, as observed in the ISO12800 shot. That will give this camera an edge.

The presence of thermal noise at high gain settings (blueish-magenta cast, with local hot spots) is still noticeable, but that's not a surprise. All the Sony-type sensors have this problem to some extent.

Direct link | Posted on Apr 1, 2015 at 19:43 UTC as 9th comment
On Adorama launches Flashpoint Ring Li-On 400ws ringflash article (56 comments in total)
In reply to:

CanonKen: Isn't this site a front for Amazon?

Of course, Simon; I realize that. My somewhat facetious comment wasn't directed towards you or site policy.

Direct link | Posted on Mar 14, 2015 at 17:53 UTC
On Adorama launches Flashpoint Ring Li-On 400ws ringflash article (56 comments in total)
In reply to:

CanonKen: Isn't this site a front for Amazon?

Could hurt sales of the Amazon-brand flashes.

PS -- Adorama sells Flashpoint through Amazon as well.

Direct link | Posted on Mar 14, 2015 at 06:19 UTC
On Sony Alpha 7S Review preview (478 comments in total)
In reply to:

Timbukto: I'm a fan of the A6000 but I think the award and scoring of the A7S just doesn't add up. Way too much brownie points are awarded for the A7S's 'good' 1080p mode. Sorry but the NX1 and GH4 come with internal 4k that when put through pro video processing and decimated to 1080p will also produce very detailed but moire free 1080p video. Now I'm not a video guy, but I assume the whole 'well it takes more work and time to post process 4k' is no different from folks who claim processing RAW for stills is too much work. You guys included someone with pro video chops for analysis and his rundown of the A7S did not seem like a 'gold award' or home run for appraise to me either. So overall we know that for stills its a bit compromised compared to other cameras...and for video, you guys harp on about how good its 1080p mode is (when other camera's come with 4k and with a little work will produce stunning 1080p!...that is the POINT of 4k...to have more to work with to produce stunning 1080p).

@Leandros S -- yes! I have no idea what Timbukto is gong on about.

Direct link | Posted on Mar 5, 2015 at 08:20 UTC
On Sony Alpha 7S Review preview (478 comments in total)
In reply to:

Timbukto: I'm a fan of the A6000 but I think the award and scoring of the A7S just doesn't add up. Way too much brownie points are awarded for the A7S's 'good' 1080p mode. Sorry but the NX1 and GH4 come with internal 4k that when put through pro video processing and decimated to 1080p will also produce very detailed but moire free 1080p video. Now I'm not a video guy, but I assume the whole 'well it takes more work and time to post process 4k' is no different from folks who claim processing RAW for stills is too much work. You guys included someone with pro video chops for analysis and his rundown of the A7S did not seem like a 'gold award' or home run for appraise to me either. So overall we know that for stills its a bit compromised compared to other cameras...and for video, you guys harp on about how good its 1080p mode is (when other camera's come with 4k and with a little work will produce stunning 1080p!...that is the POINT of 4k...to have more to work with to produce stunning 1080p).

You can do downsampling in several ways. By decimation is one naive form of it. Some methods of downsampling are called "resampling". If one were deriving a video frame from a downsampled sensor readout (as on the NX-1), one would prefer something very clean, such as bicubic, or Lanczos windowing.

Direct link | Posted on Mar 4, 2015 at 09:28 UTC
In reply to:

BobbySan: It always makes me laugh when Company X releases a camera and someone on here always says - "1080P we want 4K otherwise it's no good for film makers' BS!

The Arri Alexa family has made some great film/TV at 1080P
Skyfall - 1080P
Avengers Assemble - 1080P
Game of Thrones - 1080P

It's not about kit, it's about craft

This camera will likely be adopted by the major steadicam artists in Hollywood. It isn't about the resolution, so much as the "look" and the ability to do color grading. Arri has what is by far the preferred "look".

Direct link | Posted on Mar 4, 2015 at 07:22 UTC
On Sony Alpha 7S Review preview (478 comments in total)
In reply to:

Timbukto: I'm a fan of the A6000 but I think the award and scoring of the A7S just doesn't add up. Way too much brownie points are awarded for the A7S's 'good' 1080p mode. Sorry but the NX1 and GH4 come with internal 4k that when put through pro video processing and decimated to 1080p will also produce very detailed but moire free 1080p video. Now I'm not a video guy, but I assume the whole 'well it takes more work and time to post process 4k' is no different from folks who claim processing RAW for stills is too much work. You guys included someone with pro video chops for analysis and his rundown of the A7S did not seem like a 'gold award' or home run for appraise to me either. So overall we know that for stills its a bit compromised compared to other cameras...and for video, you guys harp on about how good its 1080p mode is (when other camera's come with 4k and with a little work will produce stunning 1080p!...that is the POINT of 4k...to have more to work with to produce stunning 1080p).

In DSP theory, downsampling by decimation is the most naive form of downsampling. To convert an 88.2kHz audio stream to a 44.1kHz audio stream by decimation is literally to skip every other sample.

http://www.dspguru.com/book/export/html/12

http://www.mathworks.com/help/simulink/gui/data-import-export-pane.html#bsup7xn-1

You could use google, starting with the dictionary.

Direct link | Posted on Mar 3, 2015 at 00:45 UTC
On Sony Alpha 7S Review preview (478 comments in total)
In reply to:

Timbukto: I'm a fan of the A6000 but I think the award and scoring of the A7S just doesn't add up. Way too much brownie points are awarded for the A7S's 'good' 1080p mode. Sorry but the NX1 and GH4 come with internal 4k that when put through pro video processing and decimated to 1080p will also produce very detailed but moire free 1080p video. Now I'm not a video guy, but I assume the whole 'well it takes more work and time to post process 4k' is no different from folks who claim processing RAW for stills is too much work. You guys included someone with pro video chops for analysis and his rundown of the A7S did not seem like a 'gold award' or home run for appraise to me either. So overall we know that for stills its a bit compromised compared to other cameras...and for video, you guys harp on about how good its 1080p mode is (when other camera's come with 4k and with a little work will produce stunning 1080p!...that is the POINT of 4k...to have more to work with to produce stunning 1080p).

So it turns out you didn't know the meaning and use of the word. Decimation is a word for line-skipping! Once we correct your usage, it turns out we agree.

Direct link | Posted on Mar 2, 2015 at 23:42 UTC
On Sony Alpha 7S Review preview (478 comments in total)
In reply to:

Timbukto: I'm a fan of the A6000 but I think the award and scoring of the A7S just doesn't add up. Way too much brownie points are awarded for the A7S's 'good' 1080p mode. Sorry but the NX1 and GH4 come with internal 4k that when put through pro video processing and decimated to 1080p will also produce very detailed but moire free 1080p video. Now I'm not a video guy, but I assume the whole 'well it takes more work and time to post process 4k' is no different from folks who claim processing RAW for stills is too much work. You guys included someone with pro video chops for analysis and his rundown of the A7S did not seem like a 'gold award' or home run for appraise to me either. So overall we know that for stills its a bit compromised compared to other cameras...and for video, you guys harp on about how good its 1080p mode is (when other camera's come with 4k and with a little work will produce stunning 1080p!...that is the POINT of 4k...to have more to work with to produce stunning 1080p).

By definition, decimation means eliminating 1 of every 10, but in practice it means throwing out 1 of 2 or 2 of 3 samples entirely (e.g., line-skipping). So it involves actually throwing away half or more of the data. That isn't a good thing!

If you're wondering why the NX-1 1080HD blows away the 5D MKII/III in detail preserved, anti-aliasing, and absence of moire, it is because the Canon does line skipping and the NX-1 does downsampling.

As for LP filtering, many downsampling methods include it as a proper part.

Direct link | Posted on Mar 2, 2015 at 23:28 UTC
On Sony Alpha 7S Review preview (478 comments in total)
In reply to:

Timbukto: I'm a fan of the A6000 but I think the award and scoring of the A7S just doesn't add up. Way too much brownie points are awarded for the A7S's 'good' 1080p mode. Sorry but the NX1 and GH4 come with internal 4k that when put through pro video processing and decimated to 1080p will also produce very detailed but moire free 1080p video. Now I'm not a video guy, but I assume the whole 'well it takes more work and time to post process 4k' is no different from folks who claim processing RAW for stills is too much work. You guys included someone with pro video chops for analysis and his rundown of the A7S did not seem like a 'gold award' or home run for appraise to me either. So overall we know that for stills its a bit compromised compared to other cameras...and for video, you guys harp on about how good its 1080p mode is (when other camera's come with 4k and with a little work will produce stunning 1080p!...that is the POINT of 4k...to have more to work with to produce stunning 1080p).

"Decimation is actually superior to downsampling."

This isn't true in any world we actually live in! I can't imagine an argument in favor of this. Your sentence is to be flogged with a wet noodle in the PST forum! :-)

Direct link | Posted on Mar 2, 2015 at 23:07 UTC
On Sony Alpha 7S Review preview (478 comments in total)
In reply to:

Timbukto: I'm a fan of the A6000 but I think the award and scoring of the A7S just doesn't add up. Way too much brownie points are awarded for the A7S's 'good' 1080p mode. Sorry but the NX1 and GH4 come with internal 4k that when put through pro video processing and decimated to 1080p will also produce very detailed but moire free 1080p video. Now I'm not a video guy, but I assume the whole 'well it takes more work and time to post process 4k' is no different from folks who claim processing RAW for stills is too much work. You guys included someone with pro video chops for analysis and his rundown of the A7S did not seem like a 'gold award' or home run for appraise to me either. So overall we know that for stills its a bit compromised compared to other cameras...and for video, you guys harp on about how good its 1080p mode is (when other camera's come with 4k and with a little work will produce stunning 1080p!...that is the POINT of 4k...to have more to work with to produce stunning 1080p).

BTW, there's no decimation in the output of the NX-1. Every frame is downsampled from a full 28MP readout of the sensor. Best 1080HD I've ever seen straight out of any camera. I'm waiting with interest to see DxO and DPR review this camera. Given all the new technology in it, I would have expected a review to get high priority.

Direct link | Posted on Mar 2, 2015 at 22:49 UTC
In reply to:

J A C S: Lenses?

I didn't suggest that there might not be more lenses in that category. I had intended to list Zeiss. I already did list Minolta. My only comment had to do with the availability of new lenses at a competitive price. Out of that list, I think only Leitz, Voigtlander, and Zeiss still make a selection of new lenses. Mitakon and SLR Magic offer one or two special lenses. None of this is bad news for Konost, and idea that I like.

Direct link | Posted on Feb 25, 2015 at 05:35 UTC
In reply to:

J A C S: Lenses?

:-) Of course there is a steady supply of the most expensive camera lenses made.

There are a few options in the Voigtlander, Minolta CL, Elcan categories. There are a few Leitz lenses available used for under $1000. But it isn't exactly the same as a lineup of Nikon f/1.8 primes pricewise.

Direct link | Posted on Feb 25, 2015 at 03:34 UTC

Putting the sensor aside for a moment, I think a lot of this camera's potential rests on the implementation of the viewfinder.

I like a good optical viewfinder. Most important is the electronic rangefinder. My main difficulty with the historic rangefinder is that it is only a single focus point smack in the center of the frame. I would like to see a focus-assist that could be used to move around the entire frame, giving the photographer the maximum creative control over the placement of the subject.

I also wonder how many framelines will be implemented, and will there be parallax correction?

Direct link | Posted on Feb 25, 2015 at 03:05 UTC as 84th comment
In reply to:

J A C S: Lenses?

Leica M mount. I'm not seeing a line of lenses in this company's future.

Direct link | Posted on Feb 25, 2015 at 02:59 UTC
Total: 121, showing: 1 – 20
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