Category Archives: Lense

tecnostratos

The lenses technology on the REDBULL STRATOS mission

by: Fito Pardo A.M.C.

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I don’t know you, but I am clueless and curious of what those lenses are, did you see the lens with the RED ONE camera? that looks like a 8000mm,  something like that  or more, I can tell you the lens with the canon that probably is the CANON-1DC (4K)  is more than double than a lens that I have, but alike that is 800mm so I can say that is way bigger than 4000mm but who knows, the system that holds the cameras is like a navy rocket launcher, impressive, I rally am courious about that system and love to know more about it.

On this link says what cameras do they used but they dont specify what lenses are used:

Redbull Stratos Camera info

90 year old camera to work with the 5D

A Canon 5Dmkii View Camera of sorts. Nearly 100 year old folding camera + Canon 5D = haunting images.

I’ve had this Piccolette Contessa-Nettel (1919) folding camera for ages. Its been a great piece of photo history sitting on my shelf. Was curious if it could make pictures again, so I hacked it onto my 5D. Here are the results. WOW!!! IT’S ALIVE!!!

QUICK RUN OF TEST FOOTAGE- GRADED AND UNGRADED (CURVES) VERSION

ONE EBAY NOW IN CANON EOS MOUNT

cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=120952288964

bognacki.com
todaystomorrow.tumblr.com/

Lomo Anamorphic Test Part I

Test footage created w/ Lomo Anamorphic Square Fronts on a EPIC-X camera at 96fps in 5K-ANA mode.

AS NOTED:
Shot with Square Front 35mm T2.8, 50mm T2.4, and 80mm T2.5 all shot wide open. One shot on a Lomo Anamorphic Round Front 50mm- which gives a more contrasty image and focuses much closer (1 meter) then the squares. One additional shot with the Square Front 35mm @ T11

Ungraded RAW REDCOLOR 2

BLOGGED AT:
todaystomorrow.tumblr.com/post/18781980515/anamorphic-part-i

bognacki.com

SLR MAGIC CINE 50mm T0.95 on EPIC X

SLR MAGIC CINE 50mm @ T0.95

Camera: EPIC-X w/ Spacecam LM/ARC mount. Shooting 5k FF in RED COLOR 3 @ 96 FPS

(Compression is softening the footage a bit …check out the flickr stream to judge sharpness)

REVIEW PART I
todaystomorrow.tumblr.com/post/20357714115/slr-magic-hyperprime-cine-50mm-t0-95-part-i

REVIEW PART II
todaystomorrow.tumblr.com/post/21790067814/slr-magic-hyperprime-cine-50mm-t0-95-part-ii

 

Cosina announces Voigtländer Color Skopar SL II 28mm F2.8 lens

Cosina has announced the Voigtländer Color Skopar SL II 28mm F2.8 manual focus prime lens for Nikon and Canon DSLRs. The latest in Voigtländer’s SL II range, it offers a wideangle 74.8° field-of-view on full-frame DSLRs or short-normal angle of around 53° on APS-C cameras. The lens will sell with a recommended retail price of €529 for Nikon, which includes an AIS chip to allow use of all metering modes, or €549 for the Canon version. No US price is yet available but we’d expect prices around $500.

KIPON released electronic adapters,using Canon EF lens on NEX&m4/3 mirrorless cameras

KIPON developed electronic adapters through the co-operation with Japanese engineers,using Canon EF mount lens on NEX &m4/3 mirrorless cameras,through the dial ring or button to control the iris of original Canon EF lens,let those who bought mirrorless cameras can enjoy the Canon EF lens.

Listing specific dates and prices to be determined.

Carl Zeiss Lenses – “Stress test”

Uploaded by  on Jan 20, 2012

Camera and cine lenses need to operate perfectly in extreme conditions, withstanding everything from scorching heat and bitter cold to sandstorms and severe vibrations. The video shows how Carl Zeiss researchers systematically submit lenses to extreme stresses in order to arrive at findings that can help in future lens design and development.

The video was shot with a Sony NEX-FS100 and Carl Zeiss ZF.2 SLR lenses with an F to E mount adapter.

Canon CNE15.5-47mm & 35-105mm T2.8 L cinema zoom

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London, UK, 12 April 2012 – Canon today announces the development of four new digital cinematography zoom lenses, as the company expands its EF Cinema Lens range to provide greater creative options for video professionals. Joining the seven high-end lenses announced in 2011, the new models support 4K (4,096 x 2,160) resolutions and will be smaller, lighter and more compact – offering outstanding mobility and quality. Available with both EF and PL mounts, the lenses will also be available at competitive prices, offering premium performance to a wider range of users.

The expanded EF Cinema Lens series will include two wide-angle cinema zoom lenses, the CN-E15.5-47mm T2.8 L S (EF mount) and CN-E15.5-47mm T2.8 L SP (PL mount), alongside two telephoto cinema zoom lenses, the CN-E30-105mm T2.8 L S (EF) and CN-E30-105mm T2.8 L SP (PL). Ideal for use with next-generation 4K cinema cameras, the new lenses will join Canon’s existing line-up of high-end EF Cinema Lenses in forming the core of the Cinema EOS system, which spans lens, digital cinema camera and DSLR categories.

In addition to compatibility with industry-standard Super 35 mm-equivalent cameras, the four cinema zoom lenses will also offer superior flexibility. Each lens will feature a compact, lightweight body supporting a wide focal range, making them ideal for handheld shooting. Combined with the Canon’s existing high-end EF Cinema primes, the new lenses will offer a greater variety of creative possibilities for video professionals of all types.

Prototypes of the new cinema zoom lenses will be on display at NAB 2012, one of the world’s largest events for the video, broadcasting equipment and digital media industries. NAB 2012 will take place from April 16 to 19 in Las Vegas, USA.

True Anamorphic Lens Adapter Tutorial on DSLRs using 5d mark II

Attaching this adapter to a DSLR is a relatively simple process, but I still am getting TONS of questions on how to do it. So hopefully this video will demystify things.

The only real spec. you need to keep in mind is the AG-7200 has rear filter threads of 72MM.

The rest is pretty much illustrated in the video. Also keep in mind this video doesn’t really go into things like image quality or edge sharpness, and or how to maximize the quality out of the adapter… it’s simply how you go about using/attaching it. The comparison at the end was just of fun little test really.

I might make a second video though that talks about anamorphic focus and depth of field with more side by side tests if people want to know more about that in the future.

(Lens used to film the tutorial was the 35mm Flektogon f2.4)

For more anamorphic videos see my links on the side bar.

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To see our feature film shot on the DVX100b go to:slimedthemovie.com/​dvd.php

Or watch the full feature on vimeo HERE: vimeo.com/​9174900

ZEISS Lightweight Zoom LWZ.2 with interchangeable mount

The new Lightweight Zoom LWZ.2 is the first on the market to combine outstanding optical image quality with an interchangeable mount.
The LWZ.2 is a cine lens designed for use with HDSLR as well as traditional cine cameras. The interchangeable mount guarantees high flexibility for present and future use in any situation and for a wide range of camera platforms.

    • Three different mounts available (PL, EF and Micro 4/3 (MFT))
    • Compact, lightweight zoom ideal for Steadicam, handheld and remote work
    • Super color matched with all ZEISS cine lenses
    • Highest optical performance despite compact build
    • T* XP coating ensures flare resistance
      The Lightweight Zoom LWZ.2 is the ideal lens for shooting in confined spaces like airplanes, car interiors or elevators. It is also great when a lightweight camera is needed for action sequences, and for applications where size and weight are at a premium, including Steadicam, handheld, remote heads, car rigs, motorcycle rigs, bicycle mounts, body mounts and underwater shoots. In addition, small size and light weight afford a more efficient shooting pace.

Source: Zeiss Cine

 

 

Have Lenses Passed Cameras in Quality?

Simplified illustration of how lateral chromatic aberration causes different magnifacations of the three RGB optical images that results in color fringing on the final Luma video.

 

 

SEATTLE—When high-end video people describe the major factors in image quality, you hear camera and lens, camera and lens. There’s an argument to be made, however, that the order should be reversed, and we should be talking about the lens and the camera.

That’s because the very top-of-the-line lenses have more than kept up with the very-top-of-the-line video cameras being employed for motion picture and television series production.

“Today the lens-camera landscape is completely different than even five years ago with the development and availability of large format HD cameras,” said Eva Paryzka, sales manager for Cinema Products at Thales Angenieux.

IMPERFECT FILM

Video lenses for general purpose cameras were designed to match the image capture capabilities of earlier cameras, and to be affordable, she said. “Today’s camera manufacturers are merging film and video production by offering PL mount, large format digital cameras with larger and more sensitive sensors, further closing the quality gap between the film and video worlds.”

It would seem that if the new single sensor cameras use a 35mm film frame-size sensor, at the same backspace, with the same PL lens mount, you could just put a high quality film lens on one of these new cameras, and get shooting.

Turns out it’s not all that easy. Film is not as perfect nor as exacting as a video sensor.

Film is less perfect?

How can that be so?

Jeff Cree, vice president of Technical Services at Band Pro Film & Digital (Zeiss and Leica lenses) noted you can start with the fact that the red, green and blue color sensitive layers of film are applied at different depths on the cellulous film backing. “You can only do a compromise focus on it,” he said, focusing crisply on one layer but not the other two.

Pixels on a video imager are at a prescribed depth. “On the Sony F35, it’s a thousandth of a micron,” he said. “So if you happen to be off, it shows. It’s minute, but we’re getting to resolutions where things like that are beginning to show.”

Because digital cinematography began with 2/3-inch sensors, additional challenges were placed on lens makers. “With the 2/3-inch, where we’ve got a very small format, all of us have had to elevate the capability of the glass to give us more line curves per millimeter, because [compared to the 35mm frame] we’ve only got fewer millimeters,” said Larry Thorpe, national marketing executive, Broadcast and Communications division, Canon U.S.A.

Lens technology developed to bring premium quality images to the 2/3-inch imagers has now trickled up to larger imager video cameras, according to Thorpe. “Some of the new 35mm PL mount lenses are claiming to have benefitted from the new designs and materials, and that they are much better than the traditional 35mm film lens.”

CHROMATIC ABERRATION

Chromatic aberration is another problem that has reared its head with the new, higher resolution video cameras. Chromatic (color) aberration (error), in simple terms, occurs because of the unequal refraction of light rays of different wavelengths. Lens designers go to great lengths to correct for this, so that all colors that make up a particular piece of detail in the viewed image converge at the same point on the sensor.

A chromatic aberration error might be seen as a slight bleeding of red, for example, on the edge of a thin line.

Fujinon National Sales Manager Thom Calabro explained that this might not really be a problem with a a lower resolution camera.

“If you have an error because you have a little bit of red bleeding, even though it’s separate from the green and the blue elements of the edge, because the red, green and blue all fall within one pixel, you won’t see it, said Calabro. “Now take that same error and put it on a camera that has a lot more pixels; you’ll have the green and the blue part of the image on one pixel, and you’ll have the red on an adjacent pixel.”

Differences between film and a high-end video sensor require video lensmakers to pay more attention to chromatic aberration. First, a 35mm sensor has smaller, more densely packed pixels, which are less than half the size of 12-micron film grain. Film can therefore hide small chromatic errors, the same as they are hidden on lower resolution video cameras. A second reason film can hide such an error is that where the pixels on a sensor remain in exactly the same position as frame after frame is imaged, film grain is randomly placed on frame after frame of film. A minor chromatic shift may be visible in one film frame, hidden a 24th of a second later in the next.

Fujinon’s Calabro noted that if chasing down a single pixel color shift seems like picking nits, remember that in a motion picture theater the image error will be seen on a 50-foot—not a 50-inch home screen.

One more difference between a video sensor and film is that the angle at which light rays enter a pixel must be more perpendicular to the sensor than is necessary when light rays strike the light-sensitive grain on film. “You’re actually looking at shooting light into little tunnels on a sensor, and the straighter you can do that, the more illumination you will have,” said Band Pro’s Cree. Special elements at the back of the lens are required to achieve this.

Though a number of digital cinematography cameras are touted as 4K (4-million pixel) imaging, there’s a lot of argument over whether we’ve actually seen a 4K camera. However, several lens makers have 4K-capable lenses ready. At NAB, we may or may not see a consensus 4K camera introduction. The lens makers are waiting for such a camera more anxiously than most. A true 4K camera will drive sales for their very best lenses.

Illustrating how the separation of the three RGB optical images might not be seen by an SDTV sensor array, but could readily be seen by and HDTV sensor array.

 

Source: TV TECHNOLOGY, by Craig Johnston