Lives in United States Tucson, AZ, United States
Works as a Physics PhD Candidate
Joined on Jul 17, 2006


Total: 185, showing: 1 – 20
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In reply to:

Jefftan: those shot don't seem any different than my A6500 and 10-18mm (or EF-S 10-18 if one like Canon)
Only difference is F4 vs F1.8 and APS-C vs full frame

huge difference in weight and price
worth it or not you be the judge

i said not worth it, I don't need thin DOF (look ugly to me)

F1.8 only use to me is for low light can use 2 stop lower ISO (tolerate the thin DOF)

If it's really damn dark, you might care about those extra two stops.

Link | Posted on Nov 16, 2017 at 13:34 UTC
In reply to:

Jefftan: if use this lens in F11 for landscape htan this F1.8 is a total waste

Paid high price and heavy weight for that F1.8

This lens is for:

1) Artsy-fartsy bokeh tricks or portraits of dogs with ridiculous noses
2) Astrophotography

Link | Posted on Nov 16, 2017 at 13:33 UTC
On article First samples: Leica Thambar-M 90mm F2.2 (223 comments in total)
In reply to:

coudet: $6,500 for a lens worth $0.99

Hammers aren't that pricey these days either.

Link | Posted on Oct 31, 2017 at 11:45 UTC
In reply to:

Becksvart: This looks like a very interesting addition. Large? The 18-105 is large, so is the Samyang 16/2, both balance rather well with two hands. Astro will probably be done angled up. I know I wouldn't hold the camera and this lens in one hand often and I wouldn't put the camera on a tripod with the lens pointing straight forward either.

Am more interested in bokeh and coma characteristics, I'm sure it will be fairly sharp towards the centre at f/1.4.

By those standards the Sigma 18-35/1.8 is positively gigantic then...

Link | Posted on Oct 28, 2017 at 07:48 UTC
In reply to:

paulfulper: Monstro doesn't belong to any language , in Italian it would be Mostro

Whenever I teach atomic physics, I tell the story of the discovery of spectral lines in the Sun that didn't correspond to any known elements on Earth. Some of the students figure out that this corresponds to a new element not known on Earth, and I ask -- well, okay, what would you call that element? Sunium?

Then I make them try to find it on the periodic table, and even ask what "sun" is in other languages that the scientists might have known. Nobody figures it out.

Then I point out that so many of our chemical names are Greek, and ask what the name of the Sun is in Greek.

... students, even good ones, don't know this!

Link | Posted on Oct 9, 2017 at 16:49 UTC
On article Sigma to reveal new lens at PDN PhotoPlus Expo 2017 (51 comments in total)
In reply to:

fishy wishy: I want a 45-135 f2.8 for dance photography, preferably one that keeps the same length in operation. Anything close to that range will do, so I don't need to keep swapping setups. A 24-105 f4 is too slow and the extending mechanism is tiresome.

Would Sigma's 50-100/1.8 do, or are you on FX?

Link | Posted on Oct 5, 2017 at 22:20 UTC
On article Sigma to reveal new lens at PDN PhotoPlus Expo 2017 (51 comments in total)
In reply to:

ihaveworms: I'd like to see more e-mount lenses. Some more targeted towards the aps-c line would be nice.

Nikon doesn't want to make DX lenses, so that'd be most welcome. Sigma's f/1.8 zooms are wonderful ... but too heavy and too expensive if you just want fast primes.

Link | Posted on Oct 5, 2017 at 22:19 UTC
In reply to:

neatpicture: I had Iphones at the the beginning, had android for the last 5 years... getting ready to go back to iphone. I am tired of having a phone that needs to be babysat a like a PC. I want a phone that just works with no fuss and no maintenance from my side.

What sort of babysitting are you talking about?

Link | Posted on Sep 15, 2017 at 22:41 UTC
In reply to:

vadims: > Let the smartphone camera wars begin.

What would be really nice is camera manufacturers waking up from their slumber and starting to address huge gap in connectivity and workflow convenience they have to smartphone manufacturers...

I just can't understand why they keep doing it so badly. SnapBridge is overengineered and undercapable...

Link | Posted on Sep 15, 2017 at 22:40 UTC
In reply to:

Mark Turney: It’s still Android 🤢.

If you buy a computer designed for Windows, you can run other operating systems on it.

If you buy a phone designed for Android, you can run other operating systems on it too -- or replace enough of the built-in apps with other things that it does whatever you wished it would do.

Link | Posted on Sep 15, 2017 at 22:39 UTC
In reply to:

panther fan: ISO 35 on a medium format Sensor. WOW!!!
There is no arguing that this is a true step above every other FF and MF camera.

Isn't it just ISO 35 because the tighter filters reject more light?

Link | Posted on Sep 13, 2017 at 16:11 UTC
On article Don't fry your sensor if you're shooting the eclipse (25 comments in total)
In reply to:

Suntan: FWIW, I shot the eclipse, wide angle, with two different cameras. Neither had filters. Both are fine.

You didn't use a 400 f/2.8 lens for six seconds, presumably because you are not an idiot,. :)

Link | Posted on Aug 24, 2017 at 02:20 UTC
In reply to:

Karroly: Hopefully, today, some pictures can be instantaneously sent to the Cloud...or to someone else's smartphone nearby who does not look like a pro photog and will not be arrested by the police... :-)

Something SnapBridge is actually good for :)

Link | Posted on Jul 28, 2017 at 02:36 UTC
In reply to:

dustymac: I'd like to put in a plug for TSA Pre-check. My wife and I had FBI background checks a few years ago and for the last couple years it's just been showing up on our boarding passes automatically. It's real sweet: no shoes off, no belts off, no laptops out, no body image X-ray or pat-down. Five minutes tops. And since we're usually late to the airport, it's saved our butts more than once in making a flight.

All that said, and at the risk of getting a visit from the FBI, there is something wrong with this country. On our last trip I watched a young mother get a full pat-down in front of everyone with her two kids looking on. Has anyone asked what it would take to make the world so great that no one wanted to blow up planes?

Just an idea...

I refuse to bribe thugs to get a partial reprieve from their thuggery.

Link | Posted on Jul 27, 2017 at 07:31 UTC
In reply to:

jeffcpix: Just making more jobs for the Deplorables

I understand his comment to mean that the TSA is essentially a jobs program for uneducated people with a tendency toward authoritarianism and xenophobia, rather than something that provides a substantive contribution toward public safety.

I agree with it, too.

Link | Posted on Jul 27, 2017 at 07:30 UTC
On article Ten things we're hoping for from the Nikon D850 (482 comments in total)
In reply to:

BokehFanatic: Looking at the list and the lists in the comments it's clear that the D810 is still extremely good.

Sure, all those features are very nice, but for 99% of the people it won't affect the output too much.

For sure. Nikon's been making essentially the same camera for a long while, and that's no bad thing; sensors have been at a very high plateau of quality for a while, ergonomics have been pretty well worked out, etc.

The one thing that would be a significant improvement for action photographers would be the D5/D500 autofocus system. I have a D500 and it really is a substantial improvement on the D810/D7100 AF.

Link | Posted on Jul 26, 2017 at 13:29 UTC
In reply to:

Turbguy1: The word "holographic" has been mentioned several times. If this device has a true "holographic" display, then it would produce a full 3D image in space with the display held at any orientation angle, not just exactly portrait, or exactly landscape, but all rotational angles in between. This requires an INCREDIBLE amount of data to be displayed. And that's for a STILL!

I would suspect it would take a "light field display" (similar to a "light field camera") to produce such a viewing device.

We all know the current success of light field cameras...

That said, the finest autostereoscopic device I have seen is the King 7S smartphone. A high resolution lenticular screen.

It would indeed require a light-field display -- a display where the relative phase of light between pixels can be controlled.

That is officially hard.

Link | Posted on Jul 9, 2017 at 12:19 UTC
On article Shooting experience: how the Nikon D7500 won me over (196 comments in total)
In reply to:

ChapelThrill23: Modern SLRs tend to be evolutionary and a lot of people on here hate on them because they are rarely groundbreaking but the fact is that a good modern DSLR is a phenomenally capable camera. Even the entry level ones are capable of producing fantastic images in most situations and can match or exceed much more expensive cameras from just a few years ago.

I have no idea why people hate on the modern DSLR. Yes, Nikon's been selling the same camera with minor changes for a while, but that's because they've had it right for a while. The D7500 sounds basically like my D7100 with a deeper buffer and a few bells and whistles -- and that's no bad thing.

Link | Posted on Jun 13, 2017 at 20:08 UTC
On article Nikon D7500 vs Canon EOS 80D (251 comments in total)
In reply to:

Hibiscusbloom: There is nothing new in technology and they keep churning up DSLRs. Start the road to mirrorless, please. Wake up Canon and Nikon, you are producing dinosaurs!!

Really? The Nikon setup that I use would actually be *larger*, not smaller, on mirrorless to do the same thing. (D7100 + 300/4E + TC1.4)

Link | Posted on Jun 13, 2017 at 00:00 UTC
In reply to:

mikey fried: I have a macbook pro and had to install windows 10 via bootcamp to run some software ( - so basically it works as a windows 10 pc). I've actually come to realise that it is so much faster running as a pc and windows 10 seems so refreshing and innovative compared the the tired old mac updates. Much more powerful pc options out there for considerably less money - so no more macs for me.

I have no idea because I'm not a CAD artist; I'm a physicist. A quick Google says that there is some software available, but it may not meet your criteria for "seriousness"; if you want something else, you'll need to emulate or run another OS.

Link | Posted on Jun 6, 2017 at 18:52 UTC
Total: 185, showing: 1 – 20
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