Dan Tong

Lives in United States Chicago, United States
Works as a Computer Consultant, Photographer
Joined on Jan 3, 2003
About me:

Olympus 2100UZ
Minolta Dimage 7i
Canon S400
Canon EOS 300D

Comments

Total: 222, showing: 1 – 20
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Reporting should always include the warranty period. I looked it up and it is 5 years, but I should not have to do that.

Link | Posted on Sep 17, 2017 at 04:37 UTC as 14th comment

It is difficult to tell from the press release as well as from Leia's web site if by "holographic display" they mean an image projected into space that you can walk around and view from 360 degrees. That is what I understand a holographic image to be.

The descriptions sound more like promo BS, but I hope it's the real thing.

Anything else is potentially worthwhile, but far less exciting.

Also what is an Interactive Holograph ?

Anything else is less exciting.

Link | Posted on Sep 9, 2017 at 05:05 UTC as 19th comment | 10 replies

Just goes to show that PRIVACY is of utmost importance to everyone.

Link | Posted on Aug 14, 2017 at 22:12 UTC as 3rd comment
On article Ten expert tips for successful macro photography (130 comments in total)

Wonderful ! Beautiful !

Thanks !

Link | Posted on Jul 26, 2017 at 17:27 UTC as 4th comment

I suppose if the photographers uses a self-timer (to avoid camera shake) and the shutter is clicked by the CAMERA, then the CAMERA owns the copyright ? ? ?
Gross stupidity, as far as I'm concerned.

Link | Posted on Jul 16, 2017 at 20:39 UTC as 53rd comment
On article Alpha-better: Sony a9 versus a7R II (506 comments in total)
In reply to:

Dan Tong: Reading between the lines it sounds like the Sony Alpha 7R II does not allow setting the camera to 1/2 the resolution in order to increase speed and sensitivity. Isn't this at least theoretically possible ?

Kharan,

Good explanation

Thanks

Link | Posted on May 1, 2017 at 22:37 UTC
On article Alpha-better: Sony a9 versus a7R II (506 comments in total)

Reading between the lines it sounds like the Sony Alpha 7R II does not allow setting the camera to 1/2 the resolution in order to increase speed and sensitivity. Isn't this at least theoretically possible ?

Link | Posted on Apr 26, 2017 at 21:34 UTC as 60th comment | 3 replies
In reply to:

thx1138: This is the bottom end of the change over price and still no 400 f/2.8 in their kit, so it's not going to happen for a huge % of sports shooters. Wedding photographers and maybe golf shooters would switch. Golf shooters can't take a shot until after the golfer hits the ball currently, silent shooting allows them to shoot the whole swing.

Any way talk is cheap 99% of the white noise on dpreview is from those that will never ever buy the A9 or own or touch a supertele but are full of absurd doomsday scenarios for pro DSLR users and know better of course.

Deliverator,

Any pro photographer worth their salt will take charge of the kissing and let them know that any kiss less than 1 minute long is an insult to the new partner....

Link | Posted on Apr 26, 2017 at 21:26 UTC
In reply to:

Steve in GA: So, the pro has to ask the question, "Would my product/service be $10-15k better if I dump my tried and true Canon stuff and switch to Sony? And, could I easily and quickly make up the difference in cost?"

I think I know how I would answer that question.

Also the time needed to learn to use the new stuff as well as the old one she / he was totally familiar with.

Link | Posted on Apr 26, 2017 at 20:48 UTC
In reply to:

kodakrome: I'm gonna switch from Canon...to even more Canon...and then maybe some more Canon after that.

HenryDJP,

I'm a big fan of innovation and I agree that Canon often lags behind, some other companies.

However, there are other factors to keep in mind.

First of all Change is not always an improvement, and can often waste a lot of time learning to do what you already know how to do with the same old, year after year.

Second, keep in mind that, except for sports photography for whom high speed and sensitivity are possibly never enough, a really competent photographer does not always need the latest, greatest technically advanced camera to take really good photos. As many serious photographers understand it is more often the skill of the photographer, rather than the equipment, that is the most important single factor. Just think about the matter of composition...

Link | Posted on Apr 26, 2017 at 20:44 UTC

A very helpful discussion of the true cost of switching from one brand of camera body to another, which, in general holds for other brand of camera body, even for non professionals, although the cost would very likely be less, since the size of lens kits are probably far less extensive.

Thanks !

Link | Posted on Apr 26, 2017 at 20:37 UTC as 35th comment
On article Panasonic Lumix DC-GH5 Review (1205 comments in total)
In reply to:

HenryDJP: Sucks that Panasonic chose to use Contrast Detection AF AGAIN!!! This doesn't seem to be a bad camera, but for the price and large size I personally feel there are better mirrorless options for either the same or less money and are more compact. If mirrorless cameras are going to end up the size of pro DSLR's then the only benefit would be the EVF. One of the benefits of mirrorless is they are smaller due to lacking a mirror. Hmm.

VisualFX "I see very little size advantage" for Panasonic or other mfg m43 lenses over APS-C lenses.

Perhaps you need to have your eyes checked.

Compare
1 Panasonic 35-100mm f/2.8 Lumix G Vario Power OIS Lens ( $1,100)
2.7 x 3.9" (6.86 x 9.91 cm), 12.7 oz (360 g)
70-200mm =35mm
vs
Canon EF 70-200mm f/2.8L IS II USM Lens ( $1,900)
3.5 x 7.8" (8.89 x 19.81 cm), 3.28 lb (1.49 kg)

2 PANASONIC 12-35MM, F2.8 LUMIX G X VARIO Power OIS Zoom Lens $1000
2.66 x 2.91" (67.6 x 73.8 mm), 10.76 oz (305 g)
24-70mm =35mm

vs

Canon EF 24-70mm f/2.8L II USM Lens ($ 1,700)
3.48 x 4.45" (88.5 x 113 mm), 28.40 oz (805 g)

I've lugged these around and both weight and size wise they are like night and day. For my purposes they are, given the limitations of the m4/3 format, equivalent. I would always prefer Canon full frame for still photos, but Panasonic for video weight, and cost wise.

If you are still not convinced, think of the enormous savings on the camera bag :)

Thanks,

Dan

Link | Posted on Apr 20, 2017 at 00:54 UTC
On article Panasonic Lumix DC-GH5 Review (1205 comments in total)
In reply to:

HenryDJP: Sucks that Panasonic chose to use Contrast Detection AF AGAIN!!! This doesn't seem to be a bad camera, but for the price and large size I personally feel there are better mirrorless options for either the same or less money and are more compact. If mirrorless cameras are going to end up the size of pro DSLR's then the only benefit would be the EVF. One of the benefits of mirrorless is they are smaller due to lacking a mirror. Hmm.

HenryDJP,

Don't forget that although the GH5 body is larger, the lens sizes remain the same which still gives a size weight advantage over the APS-C and Full Frame cameras -assuming that you want to use camera bodies with lenses : )

Link | Posted on Apr 13, 2017 at 06:39 UTC
In reply to:

Dan Tong: There is no spec on just how bright these lights are, and when, other manufacturers LED lights are described the same is either missing or are given in units that are often hard to understand. For most photographers specs in candlepower, foot candles, foot candles per second, beam candlepower, or lux does not instantly or easily convert to setting ISO, shutter speed, and possible apertures, and it is not surprising that manufacturers are not interested in letting photographers know that they will have to raise the ISO quite a bit to allow them to shoot most subjects.

In comparison to Flash Strobes, continuous lighting (LED or other) appear surprisingly weak for still photography, but ok for video work, since lower shutter speeds are often fine for video.

Perhaps there should be a standard specification, in terms of distance from object (1 meter), ISO of 100, shutter speed of 125, and APERTURE (F2 and higher), which would be most useful to photographers.

Thanks for the clarification.

Link | Posted on Apr 7, 2017 at 01:43 UTC
On article Image style AI can convert paintings to photographs (54 comments in total)

You need to go to the research web site to see that this approach can do a lot more than just attempt to go from artistic stylized image to photo realistic source. The potential uses are far wider and may be of serious interest to photographers and other visual artists.

https://junyanz.github.io/CycleGAN/

In fact it sounds great to me and I am looking forward to the future when it may be available as a commercial (and affordable) plug-in for Photoshop etc. or an independent graphics program.

Link | Posted on Apr 3, 2017 at 21:44 UTC as 20th comment

There is no spec on just how bright these lights are, and when, other manufacturers LED lights are described the same is either missing or are given in units that are often hard to understand. For most photographers specs in candlepower, foot candles, foot candles per second, beam candlepower, or lux does not instantly or easily convert to setting ISO, shutter speed, and possible apertures, and it is not surprising that manufacturers are not interested in letting photographers know that they will have to raise the ISO quite a bit to allow them to shoot most subjects.

In comparison to Flash Strobes, continuous lighting (LED or other) appear surprisingly weak for still photography, but ok for video work, since lower shutter speeds are often fine for video.

Perhaps there should be a standard specification, in terms of distance from object (1 meter), ISO of 100, shutter speed of 125, and APERTURE (F2 and higher), which would be most useful to photographers.

Link | Posted on Apr 3, 2017 at 19:54 UTC as 7th comment | 2 replies

The least persuasive case is for Portrait Photography where your subject is not moving and stays quite still, since a half press of the shutter will usually do an excellent job of autofocussing (with single AF point) without any tracking, possibly far better than tracking.

However, if you are doing re-framing, such that the focus point such as the eyes move around a lot, the tracking could save you some time, if it is really accurate.

Link | Posted on Mar 25, 2017 at 05:05 UTC as 12th comment

I loved looking through the photos with the accompanying text. Most people, including me, forget the painstaking detailed work whether performed by hand or cleverly automated.

It's incredible that the smartest people in the world have improved understanding optical principles and have devised practical solutions to build such amazing devices.

Of course we must not forget that we have not discussed the complicated processes of creating the raw materials, namely optical glass, plastic and metallic parts that are needed to fabricate a lens. Plus, very special lubricants, cleaning fluids, adhesives etc.

I almost left out all of the microelectronic processing components and memory !
I'm certain to have left out other things too...(lens coatings etc.)

Thanks very much !

Dan

Link | Posted on Mar 25, 2017 at 04:48 UTC as 8th comment

Very interesting article featuring some very capable people.

My favorite Canon lenses are:

1) Canon 70-200mm /F4L (my sample was incredibly great, possibly better than my IS version of the same

2) Canon 70-200mm /F2.8 II IS because it is faster, although much larger and heavier

These two are excellent for portraits and fashion in general. The zoom feature allows me to frame very rapidly without having to change the shooting distance. Also at the telephoto end you can blur the background very easily.

I don't like zoom lenses where the aperture changes so the exposure must be adjusted, which is especially an annoying problem for video.

What I absolutely hate is are the celebrity photos of women taken with wide angle lenses which distort feet to make them (the feet) look vertical like on a puppet. It's really horrible !

Link | Posted on Mar 23, 2017 at 04:27 UTC as 58th comment
In reply to:

cdembrey: Very strange. Why would thieves target camera stores? American camera stores are going out of business due to lack of sales.

The thieves are photographer fanatics with expensive tastes, not willing to work and save up to purchase these goods.

Link | Posted on Mar 22, 2017 at 22:18 UTC
Total: 222, showing: 1 – 20
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