Alex Permit

Alex Permit

Lives in United States United States
Joined on Sep 12, 2002

Comments

Total: 557, showing: 1 – 20
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On article Caltech research team develops lensless camera (47 comments in total)

Interesting to see optical phase array technology used as a receiver. It has been researched for over 20 years as a transmitter, see for example https://www.docketalarm.com/cases/PTAB/IPR2014-00460/Inter_Partes_Review_of_U.S._Pat._7145710/02-26-2014-Petitioner/Exhibit-1009-McManamon%2C_Optical_Phased_Array_Technology/

Link | Posted on Jun 22, 2017 at 20:28 UTC as 22nd comment
On article Now we know: Sony a9 is sharper than we thought (391 comments in total)

Thank you. I and others pointed out the softness issue, mis fopcus makes perfect sense. Would you happen to know how that happened? It's a studio shot so very easy to acquire focus. Simple human error? Or is there something more subtle?

Link | Posted on Jun 22, 2017 at 16:53 UTC as 110th comment
On article Sony a9 Full Review: Mirrorless Redefined (2676 comments in total)
In reply to:

endofoto: This comparison clearly shows that crop sensor Nikon D7200 has 10 times better DR than FF D5 and a9, DR is the most important thing for me by the way. High ISO performance of D7200 is very close to D5 and a9. What is the reason for this ? I really cant understand why? Is it video or speed? Whatever the reason is, Nikon and Sony are killing themselves.

Also, I'm not seeing the D7200 as close to the D5 in the studio shots at high ISO. The D7200 is noisier.

Link | Posted on Jun 16, 2017 at 11:08 UTC
On article Sony a9 Full Review: Mirrorless Redefined (2676 comments in total)
In reply to:

endofoto: This comparison clearly shows that crop sensor Nikon D7200 has 10 times better DR than FF D5 and a9, DR is the most important thing for me by the way. High ISO performance of D7200 is very close to D5 and a9. What is the reason for this ? I really cant understand why? Is it video or speed? Whatever the reason is, Nikon and Sony are killing themselves.

Endfoto, you need to go into the underlying data to use dxo labs tests. Their high level ISO advantage score is less then useful.
If you want see dynamic range of various cameras as a function of ISO use http://photonstophotos.net/Charts/PDR.htm.
If you prefer to see the same chart derived fom dxo mark data use
http://photonstophotos.net/Charts/DXOPDR.htm

Link | Posted on Jun 16, 2017 at 10:14 UTC
On article Sony a9 Full Review: Mirrorless Redefined (2676 comments in total)

Over 2,000 comments on a review. Is that a dpreview record?

Link | Posted on Jun 15, 2017 at 23:13 UTC as 101st comment

I'm a buyer If the "before" image is on the right, and the "after" image is on the left.

Somehow I don't think that's the case.

Link | Posted on Jun 15, 2017 at 18:49 UTC as 24th comment
On article Sony a9 Full Review: Mirrorless Redefined (2676 comments in total)
In reply to:

skookum8: Elementare's comment below really raises the question of "what if" had Nikon not bungled the V1 and its successors (for a variety of reasons that have been discussed extensively on the forums). What if Nikon had doubled down on mirrorless at that point and didn't limit itself to just the 1 inch sensor and didn't see it as self-cannibalizing to its existing product lines, etc? It would have been great for Nikon to be now working on its nth iteration of mirrorless, rather than where it is today.

They still own the patents and the design expertise behind the Aptina-manufactured 1" sensor. If they see the market need, they can still design an apsc sized version, outsourcing its manufacture.

The main question they would face is how "compatible" such a camera should be to existing f mount lenses.

Link | Posted on Jun 15, 2017 at 18:39 UTC
On article Sony a9 Full Review: Mirrorless Redefined (2676 comments in total)
In reply to:

endofoto: This comparison clearly shows that crop sensor Nikon D7200 has 10 times better DR than FF D5 and a9, DR is the most important thing for me by the way. High ISO performance of D7200 is very close to D5 and a9. What is the reason for this ? I really cant understand why? Is it video or speed? Whatever the reason is, Nikon and Sony are killing themselves.

The A9 is a sports camera, with high fps and fast, reliable auto-focus. The only DX camera that is at all comparable to the A9 is the D500. I'll add that the D500 has the same Dynamic Range as the D7200. So if a comparison is to be made, make it to the D500.

By the way, I have no idea why you say High ISO performance of D7200 is very close to the D5. The D500 has slightly higher high ISO Dynamic range than the D7200. At high ISO, my D5 has over a full stop advantage to my D500.

Link | Posted on Jun 15, 2017 at 15:28 UTC
On article Sony a9 Full Review: Mirrorless Redefined (2676 comments in total)
In reply to:

endofoto: This comparison clearly shows that crop sensor Nikon D7200 has 10 times better DR than FF D5 and a9, DR is the most important thing for me by the way. High ISO performance of D7200 is very close to D5 and a9. What is the reason for this ? I really cant understand why? Is it video or speed? Whatever the reason is, Nikon and Sony are killing themselves.

If DR is most important thing to you, by the way, then stop reading about sports cameras and get yourself a D750.

Link | Posted on Jun 15, 2017 at 04:22 UTC
On article Sony a9 Full Review: Mirrorless Redefined (2676 comments in total)
In reply to:

T3: The entire Sony FF mirrorless system is younger than the Canon 6D. The first A7 was introduced in October 2013. The Canon 6D was introduced in September 2012. That's how crazy fast Sony is moving. Who knows, Sony might even introduce the A9 MKII before Canon introduces the 6D MKII, LOL. Probably not likely, but if they did it wouldn't surprise me.

Going to XQD could speed up write time.

Link | Posted on Jun 15, 2017 at 00:50 UTC
On article Sony a9 Full Review: Mirrorless Redefined (2676 comments in total)
In reply to:

T3: The entire Sony FF mirrorless system is younger than the Canon 6D. The first A7 was introduced in October 2013. The Canon 6D was introduced in September 2012. That's how crazy fast Sony is moving. Who knows, Sony might even introduce the A9 MKII before Canon introduces the 6D MKII, LOL. Probably not likely, but if they did it wouldn't surprise me.

Just in time for the Tokyo Olympics.

Link | Posted on Jun 14, 2017 at 23:59 UTC
On article How water droplets came to life for a Gatorade ad (103 comments in total)

Impressive. Could this have been done as effectively with CGI?

Link | Posted on Jun 12, 2017 at 20:42 UTC as 33rd comment | 4 replies
In reply to:

QuarryCat: I bought recently Nikon D500, Fujifilm X-T2, Olympus E-M1II, Panasonic GH5
Canon cameras are sleeping in the shadow of Nikon (beside the better Live-View-focussing) - Eos 5DIV, 1DXII, 77D, M5, M6 were heavy disappointments for me.
I was traveling around Europe for the past weeks with all these cameras.
Panasonic GH5, is not a real good step for photography, I don't like the viewfinder at all.
Olympus E-M1II - makes 2 or more problems a day - reliability is missing for me.
Fuji X-T2 has bad energy power for a hole day, I need 2 extra accu's or more.
Nikon D500 is mostly fun - but if you are used to noiseless, direct exposure-control on mirrorless-cameras - you will pray for a Nikon without mirror and with aps-c sensor - or even better, a fusion of Nikon and Fuji!

I even used my IPhone 7+ a bit - but it is far away from a real photographers tool, sometimes good for landscapes, but without macro or tele, without faster AF it is just click-clack fast food.

You sure don't pack light. Did you bring a complement of lenses as well?

Link | Posted on Jun 10, 2017 at 11:19 UTC

And I would buy this over the cheaper Voigtlander Nokton 35mm f/1.4 because..?

Link | Posted on Jun 8, 2017 at 23:42 UTC as 26th comment | 1 reply
On article Video: Nikon D7500 first look (416 comments in total)
In reply to:

brycesteiner: The real question I have is how do you pronounce "Nikon"?

I keep getting different pronunciations from various people.

In Japanese Canon is pronounced Kiyanon, Mazda is pronounced Matsuda, and Leica is pronounced Raika (ライカ). None of these companies care how you pronounce it. They just want your money.

Link | Posted on Jun 5, 2017 at 04:23 UTC
On article Video: Nikon D7500 first look (416 comments in total)
In reply to:

brycesteiner: The real question I have is how do you pronounce "Nikon"?

I keep getting different pronunciations from various people.

tomayto, tomahto, get over it. In the US, it's pronounced "Nyecon", as sanctioned by Nikon USA.

Link | Posted on Jun 4, 2017 at 03:58 UTC
In reply to:

panchorancho: What's the point of going Sony FF, when lenses are the same DSLR size? What a gimmick!

Yes, the vidom feature does sound intriguing. Would probably take some time to gain the experience, and some convincing of sony.

The b&w idea, now that is just so simple. Besides composition, would make it easier to see shape, form, shadows, texture. @T3 is this commin to do, or did you come up with it yourself?

Link | Posted on Jun 1, 2017 at 04:49 UTC
In reply to:

panchorancho: What's the point of going Sony FF, when lenses are the same DSLR size? What a gimmick!

@T3 interesting idea. I'll experiment with that.

Link | Posted on Jun 1, 2017 at 03:38 UTC
In reply to:

panchorancho: What's the point of going Sony FF, when lenses are the same DSLR size? What a gimmick!

I think the cd vrs vinyl analogy is misplaced. Both are reproductions of a live event, but one (the cd) is more accurate than the other.

A more fitting analogy would be a cd versus a live concert. While I may certainly prefer listening to a cd on my stereo to hearing the same music played at Lincoln Center, I wouldn't say cd is better in an absolute sense. Just different.

Link | Posted on Jun 1, 2017 at 03:36 UTC
On article Roadtrip Review Redux: The Fujifilm X100F (173 comments in total)
In reply to:

Saurat: Classic Chrome, Provia, Velvia? FFS if you are at all serious just shoot Raw and process your own images.

My workflow as well, I always shoot booth. Besides ease when jpeg is good enough, it establishes for me a "baseline" for my raw processing.

Link | Posted on Jun 1, 2017 at 01:34 UTC
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