Fazal Majid

Fazal Majid

Lives in United Kingdom London, United Kingdom
Works as a Telecommunications Engineer
Has a website at https://majid.info/
Joined on May 11, 2001

Comments

Total: 420, showing: 1 – 20
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In reply to:

Fazal Majid: In Frank Herbert's novel "Dune", they use binoculars with liquid lenses shaped by force fields. From science fiction to science reality in a mere few decades.

Well, start with “Consider Phlebas” and “Use of Weapons” by Banks. “Old Man’s War” by John Scalzi. ‘The Windup Girl” by Paolo Bacigalupi. ‘Lexicon” by Max Barry. “Kirinyaga” and “Ivory” by Mike Resnick. The Murderbot series by Martha Wells. “Daemon” by Daniel Suarez.

Link | Posted on Mar 28, 2021 at 16:11 UTC
In reply to:

Fazal Majid: In Frank Herbert's novel "Dune", they use binoculars with liquid lenses shaped by force fields. From science fiction to science reality in a mere few decades.

@Old Cameras
I’m sorry, but there are better SF novels and series. I just started re-reading Iain M. Banks’ *Use of Weapons* and how by any rational standard it stands among the greatest works of literature of the 20th Century, unlike the Realist tripe like Proust or Joyce that is shoved down our throats by literary critics and professors.

Link | Posted on Mar 28, 2021 at 11:42 UTC
In reply to:

Fazal Majid: In Frank Herbert's novel "Dune", they use binoculars with liquid lenses shaped by force fields. From science fiction to science reality in a mere few decades.

It's an electric field, whether you would consider that a "force field" is debatable, but it certainly achieves what Herbert was writing about.

Link | Posted on Mar 27, 2021 at 20:12 UTC
In reply to:

Fazal Majid: In Frank Herbert's novel "Dune", they use binoculars with liquid lenses shaped by force fields. From science fiction to science reality in a mere few decades.

Yes. From the glossary:

“OIL LENS: hufuf oil held in static tension by an enclosing force field within a viewing tube as part of a magnifying or other light-manipulation system. Because each lens element can be adjusted individually one micron at a time, the oil lens is considered the ultimate in accuracy for manipulating visible light.”

Link | Posted on Mar 27, 2021 at 15:58 UTC

In Frank Herbert's novel "Dune", they use binoculars with liquid lenses shaped by force fields. From science fiction to science reality in a mere few decades.

Link | Posted on Mar 27, 2021 at 02:07 UTC as 21st comment | 15 replies
In reply to:

Fazal Majid: Eco-friendly leather == cheap plastic.

In France it's illegal to label vegetarian substitutes for foods normally of animal origin using the same term, like "milk", "butter", "steak" or "mayonnaise". I don't know if the law also applies to leather. Now Gitzo is really an Italian company now, French no more.

@Thomas Anderson
From the description it’s clear it’s just greenwashed plastic.
If it were veg-tanned leather, they would be screaming it from the rooftops.

Link | Posted on Mar 4, 2021 at 00:23 UTC
In reply to:

FTOG: What a gorgeous looking backpack. Can't help but feel reminded of the truly wonderful Billingham products.
It's a shame they don't offer shipping to all EU countries via their indiegogo campaign, else I would have bought the backpack.

It's plastic, not leather like a real Billingham would.

Link | Posted on Mar 3, 2021 at 19:17 UTC

Eco-friendly leather == cheap plastic.

In France it's illegal to label vegetarian substitutes for foods normally of animal origin using the same term, like "milk", "butter", "steak" or "mayonnaise". I don't know if the law also applies to leather. Now Gitzo is really an Italian company now, French no more.

Link | Posted on Mar 3, 2021 at 19:15 UTC as 40th comment | 10 replies

They had a limited edition green GR I a few years back, more tasteful IMO:

https://www.dpreview.com/articles/8916320108/ricoh-announces-limited-edition-gr-with-wood-grip-and-extra-accessories

As far as I am concerned, you can never be too rich or too green. That GRowiNG log is incredibly tacky, however.

Link | Posted on Feb 15, 2021 at 19:01 UTC as 62nd comment

The 55mm Micro-Nikkor has an excellent reputation, I am not surprised at all. Nikon posted two articles on it as part of their "1001 Nights of Nikkor" series:

https://imaging.nikon.com/history/story/0025/index.htm
https://imaging.nikon.com/history/story/0026/index.htm

and on the 60mm and 105mm AF Micro-Nikkor:

https://imaging.nikon.com/history/story/0074/index.htm
https://imaging.nikon.com/history/story/0072/index.htm

Link | Posted on Feb 6, 2021 at 16:13 UTC as 201st comment
In reply to:

Fazal Majid: I wonder what camera and lens they use. Using my panorama size calculator, even with a 61MP full-frame and a 1000mm lens, you still only get a maximum of 34 gigapixels

https://blog.majid.info/panorama-size/

I suspect some interpolation and number-padding is going on.

@GeraldDXB and @ZS360

I must apologize, you were right. The formula on the blog post was correct, but the calculator was using 4*f instead of 4*f*f. When f is small like 35mm or even 0.1mm, it does not make a huge difference, but for a telephoto focal length, it's dramatic.

On the plus side, that means I can hope to achieve 100+ gigapixel panos with the cameras and lenses I own, assuming I had software and a computer that could deal with it.

Link | Posted on Jan 30, 2021 at 22:01 UTC
In reply to:

Fazal Majid: I wonder what camera and lens they use. Using my panorama size calculator, even with a 61MP full-frame and a 1000mm lens, you still only get a maximum of 34 gigapixels

https://blog.majid.info/panorama-size/

I suspect some interpolation and number-padding is going on.

@GeraldDXB

I’m sorry, but whatever experience you think you have does not trump mathematics. Your panos do not have the resolution you think they have, and there is either interpolation or number-fudging going on (or as others have suggested, pixel-shifting, but that’s legitimate as long as the lens can offer that much resolution).

Link | Posted on Jan 30, 2021 at 11:26 UTC
In reply to:

photo_rb: Other than stitching thousands of individual images taken with a super telephoto, is there another way they did this? Very impressive work!

Well, the US has the WAMI "Gorgon Stare" technology, which uses 368 5MP smartphone-sized sensors in an array to surveil an area around 4km square from drones. Thus about 2 gigapixels, but in a flat view, not panoramic.

https://en.wikipedia.org/wiki/Gorgon_Stare

Link | Posted on Jan 29, 2021 at 16:18 UTC
In reply to:

Fazal Majid: I wonder what camera and lens they use. Using my panorama size calculator, even with a 61MP full-frame and a 1000mm lens, you still only get a maximum of 34 gigapixels

https://blog.majid.info/panorama-size/

I suspect some interpolation and number-padding is going on.

@GeraldDXB
Your intuition is wrong. 190GP is 3,200 time 61MP frames, and of course with overlap it would be a much higher number. A full 360º (full 4π steradians really) is actually much less than you'd, think, only 3x more than a single-row panorama if you are using a 50mm-e lens.

OK, let's do a sanity check. Assume we have a 0.1mm lens, if such a thing were actually possible. You'd then end up with two 61MP views with nearly 180º FOV each, back to back. Entering that in the calculator yields 123MB, which is what you'd expect. The calculator uses spherical angles and closed-form calculations, not approximations, and gives an upper bound if the full sphere was covered with the same resolution as a single frame, and that frame had no distortions to rob resolution.

Link | Posted on Jan 29, 2021 at 16:12 UTC

I wonder what camera and lens they use. Using my panorama size calculator, even with a 61MP full-frame and a 1000mm lens, you still only get a maximum of 34 gigapixels

https://blog.majid.info/panorama-size/

I suspect some interpolation and number-padding is going on.

Link | Posted on Jan 28, 2021 at 21:14 UTC as 50th comment | 13 replies
On article Sony teases January 26th 'Alpha' launch event (491 comments in total)
In reply to:

what_i_saw: GR III killer to be launched.😎

That would be the RX1II successor, but those have been branded as “Cybershot”, not “Alpha”.

Link | Posted on Jan 22, 2021 at 11:35 UTC
In reply to:

aris14: Α red dot companion...

@Welsh
Leica used to own Tiltall, and they make a well-received tabletop tripod and ball head.

Link | Posted on Jan 5, 2021 at 12:11 UTC
In reply to:

Slatts-from-Oz: Given the varying quality, size and cost of tripods in the market, is it about time DPreview committed some real resources to testing the marketing claims of these devices?

Many of these reviews are not hugely different from reading the brochure.

Stiffness, Dampening, and other real world testing should be achievable. I strongly suspect that the requirements for tripods are pretty easy to determine and measure.

The stiffness requirements for different levels of zoom and weight in varying conditions could be extremely useful for real world applications.

The best tripod reviews are on https://thecentercolumn.com where they use accelerometers to scientifically measure tripods' damping factor.

Link | Posted on Jan 5, 2021 at 12:09 UTC
In reply to:

onlyfreeman: Some Sony phones have the Zeiss branding on the lens module as well, like the recent Xperia 5 II.

Seems like Zeiss will "partner" with pretty much any smartphone company with enough money now.

@ultimoinfierno Zeiss is actually owned by a charitable foundation, the Carl Zeiss Stiftung, which also owns Schott glass.

Link | Posted on Dec 22, 2020 at 01:52 UTC
On photo Anna's Hummingbird In The Salvia in the PURPLE challenge challenge (11 comments in total)

They do love their salvia.

Link | Posted on Dec 19, 2020 at 01:57 UTC as 4th comment
Total: 420, showing: 1 – 20
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