Alberto Tanikawa

Alberto Tanikawa

Lives in United States NY, United States
Works as a Lens Repair Tech / Photographer
Joined on Apr 25, 2001

Comments

Total: 91, showing: 1 – 20
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It’s always great to see things like this come out. Perhaps one day a module can be made to control mirrorless lenses that only focus by wire, without direct mechanical linkage between focus ring and the focus group.

Link | Posted on May 1, 2020 at 20:59 UTC as 9th comment | 1 reply
In reply to:

Prosecutor: A can (or two or more) of disinfectant would be a better solution than to let people and photographers in the cold and without camera for month. It could take many month for your camera to get repaired and this action by Nikon is one of the worst from a marketing persepective.

That said POTUS will wave away the virus like the Chinese have waved it away.... Economics prevail over health in both of these countries.

From a Science News article I read, 2/3 of the World’s population would be needed in order to create herd immunity against covid-19 (if previously infected people actually retain immunity and do not become reinfected). But that scenario would mean somewhere around 22 million deaths in the United States alone. Given that scenario, I would much prefer we kick the can down the road, buying time for the development of a possible vaccine 12-18 months away, than allowing so many of our family and friends to perish for the dispassionate purpose of creating herd immunity at any cost.

I am a lens repair tech, and I have an elderly father who I would rather not lose because someone thinks their photo equipment is more important.

Link | Posted on Mar 26, 2020 at 02:18 UTC

Repair techs are normal people too With families, and if exposure to the covid-19 pathogen can be avoided, then so be it. Many photo related events have been postponed or cancelled everywhere, so everyone has to be patient and learn empathy if you don't already have it.

Link | Posted on Mar 24, 2020 at 14:48 UTC as 8th comment
On article Skylum teases AI Sky Replacement filter for Luminar 4.0 (111 comments in total)

Cool tech, but it’s still up to the user to select an appropriate sky for the scene. One of the samples in the video clearly has the sun coming from behind and to the left, then the guy puts a sky with a sun behind the clouds. Still impressive how the AI knows how to select just the sky and not the foreground.

Link | Posted on Aug 15, 2019 at 05:17 UTC as 46th comment

Nvidia did this in June of ast year:

https://news.developer.nvidia.com/transforming-standard-video-into-slow-motion-with-ai/

Wonder how Kandao’s approach differs from Nvidia’s.

Link | Posted on Apr 19, 2019 at 04:46 UTC as 8th comment | 2 replies

I love my 450 ProTactic. Since I don’t shoot as much these days, I have adapted it for more outdoor camping/activities. The backpack is molle compatible so I’ve added a few molle pouches to carry a first aid kit, tinder/fuel for fire starting, attachments for my axe, a large pouch for my 1.5l water bottle, another attachment for carrying my walkie talkie, a holster for my Leatherman multito, and there’s even room to attach a molle flashlight holster. Inside I carry a foldable stove in place of an iPad, and there’s plenty of room for supplies, extra clithes, and maybe a camera and one lens. It’s a very versatile backpack, and I am glad to see it updated.

Link | Posted on Sep 21, 2018 at 14:34 UTC as 6th comment

Here's the Japanese product page with further info:

http://www.tamron.jp/en/product/lenses/a034.html

Link | Posted on Feb 22, 2018 at 07:29 UTC as 37th comment
In reply to:

gordonpritchard: Over engineered?
In a world where major movies may be filmed using iPhones, GoPros, and DSLRs would these Canon lenses really make an image quality difference when viewed on a TV screen - even a UHD TV?

People forget how news crews are able to keep track of a rocket launch, for example, for minutes before the rocket becomes a glimmer in the sky. In a few seconds the same rocket would be too small to be resolved, and likely be removed by an iphone’s image processing noise reduction algorithm. There’s a reason some tools are out of reach for mere mortals: because they are meant for large corporations, sovereign states, or similarly well funded individuals that have mission critical needs. Maybe millionaires can use that lens to get a super-duper cat picture :-D

Link | Posted on Feb 20, 2018 at 23:02 UTC
In reply to:

Gmon750: Well... I guess all the harping about the advantages of Mirrorless cameras being smaller and lighter than dSLR's were once again important only to people in online forums, and not the "real" world.

At least it will resolve the huge problem will Sony cameras eating through batteries like candy.

Murphster, if I delivered $80K a year I would be a poor photographer, not just a tired one :p

Link | Posted on Jan 20, 2018 at 23:11 UTC
In reply to:

Gmon750: Well... I guess all the harping about the advantages of Mirrorless cameras being smaller and lighter than dSLR's were once again important only to people in online forums, and not the "real" world.

At least it will resolve the huge problem will Sony cameras eating through batteries like candy.

Good for you delivering so many shots a year. I used to deliver around 80K a year in weddings, engagements, parties and other events. Does it make me any better a photographer? No, it just made me a very tired photographer. Joking aside, there's ample room for both DSLR and mirrorless to coexist. I prefer DSLRs for stills, but I am eyeing that Panasonic GH5s for some video work as well. Whatever gets the job done, and works for you.

Link | Posted on Jan 19, 2018 at 02:56 UTC
In reply to:

Tester_v: So called wedding photographers are losers that cannot do anything in life become wedding photographers. By the way, they are awful as photographers.

Wedding photographers are some of the hardest working and stressed photographers out there. It requires not just photographic skill, but people skills, lighting knowledge, some IT, graphic design, and creativeness. They work under pressure to capture an event that cannot be repeated, and sometimes with less than cooperative subjects (drunks, racists, rude and/or irrational people, vendors that don’t care to work with you, hurricanes, thieves, etc). And their work doesn’t end after the party is over. Post work requires finesse, and if you make the albums yourself, a mindset at time of shooting to capture exactly what you want to design with later. Don’t knock what you do not understand, or make assumptions about wedding photographers that are completely without merit.

Link | Posted on Jan 14, 2018 at 21:50 UTC
In reply to:

Clyde Thomas: Would be good to make a native F mount version. Adapters suck.

"I'd have no problem with a mirrorless version of the D850 or D7500. In fact, that's probably the only way I would move to mirrorless."

Exactly. No adapters needed for full compatibility. Newer F-Mirrorless lenses could be developed to better take advantage of the new platform. Who says mirrorless has to mean slim and compact? Pros need rugged equipment for the field. You don’t see soldiers strolling up to a battle field in a convertible that can’t even protect them from a paintball. /s

Link | Posted on Jan 13, 2018 at 13:41 UTC

I once checked a Pelican 1650 because I was sick of baggage handlers breaking my soft suitcases. The people at the check-in booth referred me to security, where they asked if I was military. I wasn't. They said oversized luggage normally incurs overcharge, but because I was flying on New Year's eve they let it slide. And I had no damage to my luggage. All my photo gear travelled with me on a Pelican 1510 I had at the time ;-)

Link | Posted on Aug 18, 2017 at 18:05 UTC as 201st comment
In reply to:

Alberto Tanikawa: A curved sensor would not reduce vignetting, or improve peripheral illumination from lenses. That is dictated by the lens design itself. Light fall-off towards the edges will be exactly the same whether on a flat sensor, or elevated by a few millimeters on a curved sensor. More modern lens designs mitigate the need for such sensors. Not to say they are useless, far from it. Matching a telescope to a specific curved sensor should make coma a thing of the past.

Thanks for your insights Jon, I'm not an optical engineer, mostly a technicaly inclined shooter. I definitely see the benefits of this technology, and I hope to see it applied to a future product purchase someday :)

Link | Posted on Jul 15, 2017 at 14:46 UTC
In reply to:

Alberto Tanikawa: A curved sensor would not reduce vignetting, or improve peripheral illumination from lenses. That is dictated by the lens design itself. Light fall-off towards the edges will be exactly the same whether on a flat sensor, or elevated by a few millimeters on a curved sensor. More modern lens designs mitigate the need for such sensors. Not to say they are useless, far from it. Matching a telescope to a specific curved sensor should make coma a thing of the past.

As it has been mentioned in other comments, curved sensors don't make sense for ILCs or zoom lenses. This is where I was coming from. In a known, invariable focal length geometry, this makes perfect sense to match the optics with a specific curved sensor.

As far as vignetting, yes microcells help reduce it to some degree. One can go to DXO Mark and compare the same lens on different bodies, and sometimes see vastly different amounts of vignetting. But the fact remains that a lens will always project vignetting to some degree at the sensor. Curving the edges will do nothing to increase light. Only perhaps having custom lens profiles built into cameras, and then applying signal amplification at the analog stage accordingly. What Canon and Nikon do with lens profiles is likely post A/D conversion, so you induce a certain amount of posterization around the edges. I'm not knocking this technological accomplishment, just want people to be better informed about vignetting.

Link | Posted on Jul 14, 2017 at 02:35 UTC

A curved sensor would not reduce vignetting, or improve peripheral illumination from lenses. That is dictated by the lens design itself. Light fall-off towards the edges will be exactly the same whether on a flat sensor, or elevated by a few millimeters on a curved sensor. More modern lens designs mitigate the need for such sensors. Not to say they are useless, far from it. Matching a telescope to a specific curved sensor should make coma a thing of the past.

Link | Posted on Jul 13, 2017 at 03:32 UTC as 9th comment | 14 replies

Really mesmerizing!

Link | Posted on Jun 21, 2017 at 21:50 UTC as 18th comment
On article Why would I want an external recorder/monitor? (68 comments in total)
In reply to:

Alberto Tanikawa: I've acquired a SmallHD DP4 for my video newbie endeavors, and although it has served me well, I feel the need to upgrade it. The Atomos Shogun Inferno seems to fit the bill nicely. It should also fit nicely in my rig. Which will eventually lead to further upgrades down the line: a better video camera than my current Nikon D7100, beefier fluid head and tripod, wireless mics, external battery pack... And we thought still photography was expensive.

rfsIII, I'm definitely keeping the D7100 for stills, but I'm eyeing the Panasonic GH5 with a Metabones Ultra to use my Nikkors. All manual focus, so I'm not worried about any AF issues/non-issues the GH5 has. The Shogun Inferno would initially be used for monitoring only, but should I ever need to record DCI 4K in 10-bit 4:2:2, I should be set.

You bring a good point about iphones/androids for recording the talent remotely. I don't do any live streaming, and dialog can be synced in post.

Link | Posted on Jun 14, 2017 at 18:10 UTC
On article Why would I want an external recorder/monitor? (68 comments in total)

I've acquired a SmallHD DP4 for my video newbie endeavors, and although it has served me well, I feel the need to upgrade it. The Atomos Shogun Inferno seems to fit the bill nicely. It should also fit nicely in my rig. Which will eventually lead to further upgrades down the line: a better video camera than my current Nikon D7100, beefier fluid head and tripod, wireless mics, external battery pack... And we thought still photography was expensive.

Link | Posted on Jun 14, 2017 at 02:53 UTC as 5th comment | 3 replies

I hope that offsets this accounting mishap of nearly half a billion dollars:

http://uk.mobile.reuters.com/article/idUKKBN19008R

Different division, but a company has to balance its books sonehow.

Link | Posted on Jun 12, 2017 at 22:22 UTC as 32nd comment | 3 replies
Total: 91, showing: 1 – 20
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