Alec

Alec

Lives in United States New York City, NY, United States
Works as a Photographer / imaging artist
Has a website at http://karasevstudio.com/
Joined on Oct 24, 2000
About me:

* More architectural and recreational sports photography in the off-season (skiing and scuba);
* Roll out blog feature on the web site
* Put articles, more photos and video online
* Minolta archive!

Comments

Total: 96, showing: 1 – 20
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On Nikon D810 Preview preview (1314 comments in total)
In reply to:

Alec: I currently have a D800, and for tethered shooting using HDMI out to an external 24" monitor for manual focusing, I currently have to use an EyeFi card, because D800 won't simultaneously enable USB tether and HDMI output.

Is D810 able to do the latter?

Also on the video front, is it scaled from all pixels on the sensor or produced using line-skipping?

Galbertson on a D800 you can, if you capture pix on a memory card as opposed to directly in a computer.

Since D800 can write video to the memory card AND HDMI out, I was thinking it might also be able to do USB3 tethering and HDMI out concurrently as well, that D800 can't. So, anyone?

Direct link | Posted on Jul 24, 2014 at 02:31 UTC
On Nikon D810 Preview preview (1314 comments in total)

I currently have a D800, and for tethered shooting using HDMI out to an external 24" monitor for manual focusing, I currently have to use an EyeFi card, because D800 won't simultaneously enable USB tether and HDMI output.

Is D810 able to do the latter?

Also on the video front, is it scaled from all pixels on the sensor or produced using line-skipping?

Direct link | Posted on Jul 24, 2014 at 01:21 UTC as 87th comment | 3 replies
On Beyond the ordinary: Tim Dodd's Everyday Astronaut article (102 comments in total)
In reply to:

backayonder: mirror mirror on the wall who is the sexiest astronaut of them all

... Which is disqualifying how, exactly, if one talks about looks even outside of the point that Yuri's the genuine article? Nations arbitrarily chose different terms for the same profession - surely we're not disqualifying anyone based on nationality?

Direct link | Posted on Jul 15, 2014 at 03:49 UTC
On Beyond the ordinary: Tim Dodd's Everyday Astronaut article (102 comments in total)
In reply to:

backayonder: mirror mirror on the wall who is the sexiest astronaut of them all

Seriously, is there even a contest?
http://www.wallpaperspictures.net/image/yuri-gagarin-wallpaper-for-2560x1920-876-26.jpg

Direct link | Posted on Jul 14, 2014 at 05:50 UTC
On Beyond the ordinary: Tim Dodd's Everyday Astronaut article (102 comments in total)
In reply to:

Paul Farace: The last image transcends the ordinary and becomes a political statement of Obama's NASA... our nation left to play on a toy shuttle...

Esp considering the only actual hardware involved is a Russian scaphander.

Direct link | Posted on Jul 13, 2014 at 17:07 UTC
In reply to:

Babka08: This is a brilliant yet so obvious concept. Mimic the human eye. Folks, it's in R&D. Don't get yer knickers in a knot about which camera they're building for precious you. Like any technology, they'll launch something that they "can" at that moment, which will have limitations. And it starts expensive. And then it improves and gains wider usage, and costs come down, and its quality goes up.

The bottom line here is, it's a very innovative development with immense potential.

The curved light sensing surface allowing a flatter in-focus area from a simpler lens, I think, is fair to say mimics nature. Digital sensors just like eye retinas, do not build an image - they both need interpretation/processing.

Direct link | Posted on Jun 22, 2014 at 18:06 UTC
In reply to:

Cheng Bao: If any manufacture want to risk for develop whole new lens system from ground zero, yes, it can be done with interchangeable lens camera system.

Just like mirrorless system, manufacture need to invest a lot to build new lenses. Old lenses can work on mirrorless system or curved sensor system, but with comprise - for mirrorless system, you have to sacrifice AF performance greatly or use bulky and expensive adapter like sony LA-EA2 and LA-EA4.
For curved sensor, the compromise is same: you have to sacrifice corner qualiity or use bulky expensive adapter which makes flat focus field curved again.

or we need to wait for more technology advancement. Like on sensor PDAF to work with legacy SLR lenses for fast-AF (like E-M1) or in curved sensor case, a flexible curvature sensor, which I don't expect to see in near future.

Without performance/cost figure of some lens-sensor combination, we cannot judge if it is worth to make new cameras base on that, let alone new interchangeable lens one

As main-sensor-integrated phase-detection AF matures, focusing speed can be had without the bulky AF adapters. Additionally as manual focusing peeking aids become more and more ergonomic, it will be feasible to manually focus with such ease that AF motor function will lose the criticality it had once earned.

A curved depth of field isn't really a loss of quality in the corners - it is simply focused a little closer or farther than center. Unless one photographs newspapers, it's not a big deal.

Direct link | Posted on Jun 18, 2014 at 17:52 UTC
In reply to:

Babka08: This is a brilliant yet so obvious concept. Mimic the human eye. Folks, it's in R&D. Don't get yer knickers in a knot about which camera they're building for precious you. Like any technology, they'll launch something that they "can" at that moment, which will have limitations. And it starts expensive. And then it improves and gains wider usage, and costs come down, and its quality goes up.

The bottom line here is, it's a very innovative development with immense potential.

Not so new. Minox cameras have had curved film gates, to maximize sharpness from compact lenses. Flat DOF was more important for these cameras than most, as they were often used as spy instruments to copy documents.

Direct link | Posted on Jun 18, 2014 at 17:46 UTC
In reply to:

KW Phua: This is very helpful for thin camera with big sensor, but only for fix lens camera. So we can predict the path Sony has chosen.

I imagine, a well-chosen average curve can serve no worse for interchangeable lens cameras than the present flat surface that current interchangeable lenses all have to target. A slight curve mismatch is not the end of the world - so the corners of the frame are focused a few % farther or closer than the center. For 3D subjects, so what?

Direct link | Posted on Jun 18, 2014 at 14:05 UTC
In reply to:

Tom Caldwell: I guess at some stage Chinese made lenses must come of age. Just as much as the first post WWII Japanese output was not accepted but within a relatively short time had finished off the bulk of camera manufacturers in Europe.

Not sure when the US camera/lens industry died - was it Polaroid and Kodak?

But I am sure there are plenty of good optical engineers and talent in the USA it has just resiled from mass production of camera objects. Right now if it is not made in Germany or Japan it cannot possibly be any good.

Thanks to a globalized labor market and manufacturing, good engineering and tech know no boundaries. With quality control, iPhone 5s have been made and assembled in China to tolerances that exceed what's necessary for even the best camera lenses.

Brands used to be sources of genuine institutional pride (by folks who'd stayed with the same companies for life) and distinct cultures - which translated into unapologetically unique products. Nowadays brands look at the same 3rd party manufacturing capabilities and the same marketing spreadsheets. They're little more than fashion statements.

Direct link | Posted on May 7, 2014 at 16:02 UTC
On ThinkTank Streetwalker HardDrive Backpack Review article (79 comments in total)

Beavis approves name. Hard. Heh heh. Drive. Heh heh.

Direct link | Posted on Apr 26, 2014 at 04:17 UTC as 21st comment | 1 reply
On Q&A with Lytro's CEO and founder on the Illum article (24 comments in total)
In reply to:

Chris2J: Although the jury is still out on how it will perform, I think the external design is really new, excellent and not copying anything previously seen. I like it. So let us see an independent review ...

Not to mention the similarly lens-centric SONY DSC-Fxxx entire series of cameras http://www.dpreview.com/reviews/SonyDSCF707/Images/frontview.jpg

Direct link | Posted on Apr 25, 2014 at 01:52 UTC
On 1991 Nikon-Kodak hack was first DSLR in space article (65 comments in total)

Since when spy satellites don't count as digital cameras in space?

Direct link | Posted on Apr 18, 2014 at 00:54 UTC as 21st comment | 2 replies
On Zeiss announces Compact Zoom CZ.2 15-30mm T2.9 lens article (62 comments in total)
In reply to:

Frank_BR: OK, I agree this Zeiss lens is probably as good as the Nikon 14-24mm F2.8 that costs less than $2k. But why does Zeiss have a fixation with the number 9?

T2.9 T1.9 € 44,999 US$ 59,900 € 17,900 US$ 23,900 ...

This cine zoom lens is likely to be considerably more complex than a photo lens you mentioned optically and / or mechanically. Photo lenses "zoom" a little (image size changes) when you change the focus point - whereas cine lenses (except cheap ones like Samyang etc) do not.

Direct link | Posted on Mar 29, 2014 at 03:12 UTC
On Panasonic Lumix DMC-GH4: a quick summary article (471 comments in total)

Love the "cine grip" option. I believe every semipro and higher DSLR/DSLM camera (that doesn't already have the grip) should have available both a simple photo vertical grip and a cine-friendly interface like the DMW-YAGH for this camera.

I'm currently using a separate Zoom audio recorder and would love to be able to eliminate it. Or add 2 more channels.

Does this thing capture 24/96 audio or 16 bits / 48KHz only?

Direct link | Posted on Mar 11, 2014 at 16:54 UTC as 12th comment
On Panasonic Lumix DMC-GH4: a quick summary article (471 comments in total)
In reply to:

DGurney: So it records HD at a higher bitrate than 4K. Brilliant.

Idiosyncratic, but may be simply because doing HD instead of 4K frees up some computing cycles to enable them to do so. I suspect there could have been an internal debate along the lines of "some users will be confused by the availability of such super-high bit rates". Fortunately folks have prevailed who believe in not holding back viable features because they might "confuse" users.

Direct link | Posted on Mar 11, 2014 at 16:48 UTC

@ncsakany has a point. I too see a little too much chest-pounding - but then again, if they're worried and scrambling for a genuine lasting solution, it is understandable that they're not revealing that sentiment in a dpreview interview.

More on cellphone impact on DSLRs: http://karasevstudio.com/o2/2013/32

Direct link | Posted on Mar 3, 2014 at 20:35 UTC as 83rd comment
In reply to:

fdfgdfgdgf: "DSLRs can capture the moment better than mirrorless, because you're viewing directly, not through an LCD"

That was a good one

@T3 I agree that today's EVFs are in their infancy and that different people have different priorities - to some the immediacy and fidelity of optical matters more; to others the magnification potential and native focusing precision of main-sensor-based EVF are empowering and worth the growing pains.

I'm okay with either one personally. I do prefer the auto and high mag finders on my Pentax 67II to anything - the apparent size and fidelity of the view are just stunning. I am hoping someday we'll have 4K retina display EVFs with great tonality and not optically constrained to the underlying format, such that you could have both excellent magnification/apparent size, and eye relief.

Direct link | Posted on Mar 3, 2014 at 20:31 UTC
On Tamrac launches rugged-looking photo messenger bags article (106 comments in total)

This looks nearly identical to Adorama's and National Geographic's photo messenger bags. I hope I'm wrong because as I type this, those other ones are busy at my place storing the type of stuff one throws out when they move apartments.

Direct link | Posted on Feb 5, 2014 at 15:10 UTC as 9th comment
On Tamrac launches rugged-looking photo messenger bags article (106 comments in total)
In reply to:

SRT3lkt: strangely, no one on the video uses camera strap.

Camera straps are messy and imperfect. They belong in the crude world of "actual users" not in the world of designers who make perfect dainty sketches of perfect products in perfect moleskine noteooks over perfect lattes.

Direct link | Posted on Feb 5, 2014 at 15:05 UTC
Total: 96, showing: 1 – 20
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