E Dinkla

Lives in Netherlands Netherlands
Works as a Printer
Joined on Mar 30, 2009

Comments

Total: 47, showing: 1 – 20
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http://forum.luminous-landscape.com/index.php?topic=95208.20

Link | Posted on Aug 27, 2017 at 14:57 UTC as 12th comment
In reply to:

ProfHankD: Nice little project/demo. Foolish me, I would have moved the film plane to focus... the electrowetting is so much cuter. ;-)

I guess Robin de Puy, a rising star in Dutch photography, must have had a good adviser that guided here to this technology. This time at least, not so long ago an article cited her as using a standard lens because it resembled the human eye sight so well, an advice a famous Dutch graphic designer gave here ........

Link | Posted on Jun 23, 2017 at 11:49 UTC
In reply to:

ProfHankD: Nice little project/demo. Foolish me, I would have moved the film plane to focus... the electrowetting is so much cuter. ;-)

The men with the knowledge on electrowetting shown in the video are from my hometown Eindhoven. The company is Liquavista that is a spin-off of Philips, purchased by Samsung at some point and then Amazon. Their main goal is the development of low energy transmissive or reflective display screens. More or less multiple droplets in small bags stacked between foils. An interesting possibility is a reflective CMY(K) screen but RGB , monochrome etc is also possible.

Water as a lens element is not unknown in history, Sutton's wide angle camera had it like described here. You can see it in the London Science museum;
http://www.mhs.ox.ac.uk/about/sphaera/sphaera-issue-no-8/sphere-no-8-thomas-sutton-panoramic-camera-lens/

Lace knitters in Brugge used lamps that had a water bowl as a condensor for the light; https://www.exploratorium.edu/snacks/water-sphere-lens

Link | Posted on Jun 23, 2017 at 11:39 UTC
In reply to:

AbrasiveReducer: Is this new factory in Marly (not Marley) a previously Ilford facility?

It is mentioned here:
http://www.adox.de/Photo/adox-acquires-ilfords-medium-scale-coating-line/

In 2014 Wifag-Polytype already acquired Ilford Imaging patents + hired former Ilford-Imaging chemists, engineers etc.
http://www.wifag-polytype.com/fileadmin/user_upload/press_downloads/2014-05-08_Ilford/PR20140219-Fachpresse-Ilford-E.pdf

The Ilford brand name for inkjet papers is now used by an Australian/Japanese distributor; http://www.amateurphotographer.co.uk/latest/photo-news/ilford-galerie-photo-paper-set-for-1-3m-comeback-6146

Ilford-Imaging was the Swiss split-off of the original Ilford, the UK Ilford film manufacturing plant is owned by Harman Technologies and is still producing Ilford films. The Harman inkjet papers are no longer produced/distributed according recent Hahnemühle news.

Met vriendelijke groet, Ernst

http://www.pigment-print.com/spectralplots/spectrumviz_1.htm
February 2017 update, 700+ inkjet media white spectral plots

Link | Posted on Feb 22, 2017 at 10:28 UTC
On article Fotodiox LED100WB-56 quick review (57 comments in total)
In reply to:

Julia Borg: CRI does not characterize LEDs well enough. have you tried measuring SPD?

For a guide on CRI - CQS etc standards:
http://www.olino.org/us/articles/2015/03/07/color-quality-scale-cqs-measuring-the-color-quality-of-light-sources
BTW the Olino.org measurements of lamps give you way more information to draw conclusions on light source characters.

Met vriendelijke groet, Ernst

http://www.pigment-print.com/spectralplots/spectrumviz_1.htm
November 2016 update, 700+ inkjet media white spectral plots

Link | Posted on Jan 18, 2017 at 09:24 UTC
In reply to:

HowaboutRAW: Re, image 8 caption: What are "snow particles"?

Are they a product of nuclear plants? Or coal plants?

Or is it just that a non-native speaker of English wrote the caption?

After reading your explanation and living in The Netherlands at the border of Belgium I will sleep a lot better. Now they only have to sort out the small cracks in the reactor rings :-)
https://en.wikipedia.org/wiki/Nuclear_energy_in_Belgium
Interesting term there; Hydrogen Flakes.

Converted cooling tower:
https://www.wunderlandkalkar.eu/nl

BTW, I guess image 10 shows the top of the floating deck, the gas is underneath that part. Weights on the deck are there to keep the gas pressure at a certain level, main weight is the concrete ring along the wall.

Link | Posted on Nov 6, 2016 at 10:30 UTC
In reply to:

miles green: And what's with the huuge hood on a pancake lens!? Something like the Pentax 21mm limited would have been a much better design.

Yup, the rectangle window sunshade like used on the 21mm would be better. Long ago I have seen a hood like that described as a Meissner Blende but no google confirms that name. I have been experimenting to create shades like that by stacking empty filter rings + a (rounded) rectangle mask in the top one. Plus the possible use of a filter on top of that as there is still a filter thread open then. As I understand it using a filter + the Pentax hood creates some issues.

Link | Posted on Oct 20, 2016 at 08:23 UTC

More or less a true Plasmat lens for FF. I guess that between the first version and this one less than 5 Plasmat designs were introduced for FF, by any company. The Canon EF 40mm 2.8 is more a hybrid Planar/Plasmat. Performance/price wise the Canon is the one to beat. Sure it is another focal length. Small mirrorless cameras, with improved high ISO quality sensors, could use small, slower lenses and by that ask for optical designs like the Plasmat, Heliar and Tessar. The image quality of modern Plasmat + hybrids is probably preferred above the Tessar variations. I guess little optical design changes of the original Summaron could go unnoticed in a lens diagram but show a much better image quality in practice.

http://www.klassik-cameras.de/Canon_Wideangles.html

Link | Posted on Oct 20, 2016 at 07:29 UTC as 27th comment
In reply to:

johnsmith404: Since people were asking, at a CP+ presentation the Sigma CEO has explicity stated that Canon, Tamron and Tokina lenses are not supported by this adapter (the LED shouldn't even turn on).

Depends on a possible agreement with Sony and/or Canon which I doubt exists at all. I guess Sigma has a qualified software department with a thorough knowledge of Sony, Sigma, Canon and Nikon camera protocols based on reverse engineering. They must be aware what is covered in patents too. Metabones and other third party adapter makers were welcome for Sony to establish the FE mount cameras in the market and make the switch for all DSLR customers easier. It becomes something else if a third party lens maker gets an easy entrance. Supporting Sigma + Canon lenses as well on all the focusing features is probably too much asked for happy faces at all the involved marketing departments. Right now Sigma is the winner. Anything beyond is hacker's territory and could be within legal limits or not just.

Met vriendelijke groet, Ernst Dinkla

http://www.pigment-print.com/spectralplots/spectrumviz_1.htm
January 2016 update, 700+ inkjet media white spectral plots

Link | Posted on Mar 9, 2016 at 12:52 UTC
In reply to:

johnsmith404: Since people were asking, at a CP+ presentation the Sigma CEO has explicity stated that Canon, Tamron and Tokina lenses are not supported by this adapter (the LED shouldn't even turn on).

A USB connector and nobody will try to hack more functionality to that adapter? Unlikely.

Met vriendelijke groet, Ernst

http://www.pigment-print.com/spectralplots/spectrumviz_1.htm
January 2016 update, 700+ inkjet media white spectral plots

Link | Posted on Mar 7, 2016 at 16:07 UTC

There is of course a mirrorless solution possible where EF lenses play a role and a smaller than 44mm flange to sensor distance can be created. Sure there are advantages in using a Sony + EF-FE adapter but the total did not reduce the 44mm flange to sensor depth measured from the EF flange. A focal length reducer integrated in the camera can be designed way more optimal to image quality, sensor size, than one that has to function in between existing lens/camera designs both from different manufacturers. Three parties involved right now for that solution. The sensor size does not have to be FF or APS but the size should result from weighing all aspects and sound optical design decisions. It has been on my mind for some time:
http://www.dpreview.com/forums/post/57163063

Met vriendelijke groet, Ernst

http://www.pigment-print.com/spectralplots/spectrumviz_1.htm
January 2016 update, 700+ inkjet media white spectral plots

Link | Posted on Mar 4, 2016 at 10:40 UTC as 13th comment
In reply to:

E Dinkla: Mamiya Six folder camera was probably the first camera with a film plane focusing system. Not AF though but a patent on film plane focusing must have expired, the camera is at least 60 years old.

Ernst Dinkla

The film in that camera moves within the camera body to focus while the lens is a rigid part of the body (though being a folder camera the lens can be folded into the body).

Ernst Dinkla

Link | Posted on Feb 13, 2016 at 19:10 UTC

Mamiya Six folder camera was probably the first camera with a film plane focusing system. Not AF though but a patent on film plane focusing must have expired, the camera is at least 60 years old.

Ernst Dinkla

Link | Posted on Feb 12, 2016 at 18:12 UTC as 27th comment | 3 replies

Good concept for AF in macro work with bellows. Between the camera mount and the bellows after the main focusing has been done manually. Moving the camera instead of the lens. Auto focus stacking should be possible too then, about 4 mm movement I read some weeks ago, DPreview is late with this news. Wonder though whether the M mount side hole is wide enough in that case and I guess there are not that many bellows with M mount at the back. Adding another adapter is not the way to go, so give us the same AF part with a more common bellows mount. If used with auto aperture lenses a wire link from adapter to lens is welcome too. Not impossible as I made one already between an EF-FD adapter and a reversed EF mount macro lens at the other end of an FD bellows. But the adapter should get Sony aperture control then. My DIY work was the reason why I thought a year ago that an AF module between camera and bellows would be handy. Well it is there more or less.

Met vriendelijke groet Ernst Dinkla

Link | Posted on Feb 12, 2016 at 10:13 UTC as 37th comment

What happened to the $ : £ ratio going from 21mm to 50mm?

Ernst Dinkla

Link | Posted on Sep 23, 2015 at 12:01 UTC as 11th comment
In reply to:

photo perzon: most stupid waste of press -- like a car that wont take you because already people are there

What a great idea. Could be nice in summer when half the population goes to the beach and your car drives you to the least crowded one. For the environment it could be good too, forcing public transport use to places that are already overloaded.

I think the Restricta hit some veins in the DPreview crowd.

Link | Posted on Sep 11, 2015 at 09:43 UTC
In reply to:

Top Dog Imaging: If you've ever used a 4-shot Sinar or Hasselblad back, you will be amazed by the difference. The big advantage is no bayer interpolation--much better than a Foveon sensor. My guess is the new sensor will be 20 MPs, hence 40 MP resolution from 8-shots. This may be a game-changer for product, reproduction, and architectural photographers. Furthermore, the capability of mounting an Oly body onto a Cambo Actus opens the system up to infinite possibilities.

Strange that DPreview mentions Hasselblad while Sinar introduced that feature more than a decade ago and made improvements on it since.

Link | Posted on Dec 5, 2014 at 15:31 UTC
On article Portrait Salon 'rejects' exhibition opens in London (62 comments in total)

The 2013 National Portrait Gallery had a high portion of "Rineke Dijkstra" esthetic content, wonder whether that is also found in the 2014 exhibition. Maybe the first rejected sample shown was on the edge of being accepted then.

Time will tell which art lasts anyway:
http://en.wikipedia.org/wiki/Salon_des_Refus%C3%A9s

Ernst Dinkla

Link | Posted on Nov 7, 2014 at 09:29 UTC as 7th comment | 2 replies
In reply to:

pellicle: you know that Canon has plateaued out when you see this sort of release. Great innovation there guys

Ten steps more on the route from Canon to Sony.

Link | Posted on Sep 27, 2014 at 10:00 UTC
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