RCE Foto






Login LogoutIscriviti a JuzaPhoto!
JuzaPhoto utilizza cookies tecnici e cookies di terze parti per ottimizzare la navigazione e per rendere possibile il funzionamento della maggior parte delle pagine; ad esempio, è necessario l'utilizzo dei cookie per registarsi e fare il login (maggiori informazioni).

Proseguendo nella navigazione, acconsenti all'utilizzo dei cookie e confermi di aver letto e accettato i Termini di utilizzo e Privacy.

OK, confermo



Hbd
www.juzaphoto.com/p/Hbd



avatarCanon 1dx mark iii: intervista ai responsabili del progetto
in Fotocamere, Accessori e Fotoritocco il 11 Novembre 2019, 17:50


Come da oggetto,

www.dpreview.com/interviews/6888036612/canon-interview-eos-1d-x-mark-i

Non hanno fornito dettagli ulteriori a livello di specifiche, ma anticipano di aver lavorato molto per migliorare l'autofocus e la qualità d'immagine, oltre che la modalità video. Cito alcuni stralci:

"- How did you decide which features to update compared to the EOS-1D X Mark II?

There were a variety of factors. We get a lot of requests from our professional users, and we're always listening to what they need. Their demands are sometimes very detailed! But we have to listen to their requests. In addition, we have to look at our technology - what kind of technology can meet those demands.

We then integrate [those pieces of information] and decide internally what we should include in the next model. In this new camera we've improved performance [in several areas] , such as autofocus, networking and so on, which we'll explain later in detail.

- What were the main requests from users of the 1D X and 1D X II?

One important thing was the weight of the camera, and second, autofocus performance. We made sure there is no compromise in the AF performance of the new camera. And number three is network performance, which is very important [for wire services] - how fast you can put images into publication. We thought that there was room for improvement in that aspect of the camera's performance. Lastly, image quality is of course a big thing. We worked on noise reduction, as well as high sensitivity image performance.

Also keep in mind that we have put a lot of effort into improving movie shooting performance as well as stills.

- Why did you make the decision to change the memory card type to CFexpress?

Speed. In terms of read and write speed, these cards are immensely faster than previous solutions. CFexpress is more than twice as fast as CFast. It has more development potential.

- This is the first high-end camera Canon has released since the EOS R. Are your high-end and professional customers asking for a mirrorless solution?

Of course some professional photographers are asking for a mirrorless solution. But as of now, we also see a lot of demand from photographers asking for DSLRs, specifically [because of] the benefits of an OVF. So this time around we decided to go for a DSLR. Of course we understand that there are huge benefits to mirrorless, and we implemented, or combined as much of that [technology] as we could into the [EOS-1D X Mark III] .

For example one of the things that we implemented from the mirrorless side was the ability to shoot at 20fps using electronic shutter. And autofocus performance, specifically subject tracking is on par with some of today's top-notch mirrorless cameras."


3 commenti, 130 visite - Leggi/Rispondi


avatarCanon 1dx mark iii, breve video
in Fotocamere, Accessori e Fotoritocco il 29 Ottobre 2019, 13:24


Come da oggetto,

qui si può reperire un breve video dove appare un prototipo della 1dx mark III, che è stata esposta all'evento Photoplus, in America.

www.newsshooter.com/2019/10/27/canon-1dx-mark-iii-first-look/

Esternamente sembra quasi identica alla 1dx mark II, come mi aspettavo: per il resto, vi è una breve intervista ad uno dei responsabili di marketing locale Canon, ma non fa altro che confermare le specifiche illustrate negli annunci ufficiali.

Le specifiche più estensive che ho reperito sono quelle riportate sul sito di Canon Asia (o meglio, probabilmente sul sito giapponese vi è di meglio, ma vi è il problema linguistico).

asia.canon/en/business/eos-1d-x-mark-iii-flagship-dslr-camera/news

"1. Newly developed CMOS sensor and image processor for higher image quality and faster continuous shooting speeds

- Canon's in-development proprietary CMOS sensor and image processor will realize higher sensitivity for stills shooting compared with predecessor models. Saving of still-image 10-bit HEIF files will be supported. In addition, the camera will support internal recording of 4K / 60p / YCbCr 4:2:2 / 10-bit / Canon Log and RAW format video.
- AF and AE tracking supported whether shooting with the optical viewfinder (OVF) or live view and improved continuous shooting speeds compared with previous models. With AF and AE tracking, the camera realizes up to approximately 16 frames-per-second shooting using the OVF and 20 with live view. What's more, when shooting with live view, photographers can choose to shoot using either the mechanical shutter or electronic shutter.
- 5x increase in maximum number of images captured when performing continuous RAW shooting compared with predecessor models.


2. More precise autofocus thanks to newly developed AF sensor and AF algorithm

- A new AF sensor will be employed, which increased the number of effective pixels in the center pixel area by approximately 28x compared with predecessor models. High-resolution signals obtained by the AF sensor will enable high focus accuracy when shooting through the OVF. In addition, an expanded AF brightness range will be available for both OVF and live view shooting.
- When using either the OVF or live view, the new AF algorithm, which features more stable performance, will utilize deep learning technology to further improve it tracking capabilities.
- In live view, the AF offers an expanded focus area of approximately 100% (vertical) and approximately 90% (horizontal). In addition, up to 525 measurement points can be used for AF when using automatic selection.


3. Serving professional needs with enhanced data transmission functionality

- The currently in-development Wireless File Transmitter WFT-E9 (regulatory approval pending), when used with the EOS-1D X Mark III, realizes more than twice the wireless image data transmission speed2 as its predecessor model, the WFT-E8 (released in April 2016). What's more, the WFT-E9 can also be used with the EOS C500 Mark II cinema camera (to be released in late December 2019).
- Serves as a connection to smartphones and other mobile devices via Wi-Fi and Bluetooth® . Also enables recording of GPS information at the location of image capture.
- When using a wired LAN connection, the WFT-E9 achieves more than twice the image data transmission speed of its predecessor model.
- Improved UI for establishing network connections.
- Expanded link functionality with various equipment. Compatible with the in-development Remote Control Pan-Tilt System which enables remote camera operation.

4. Trusted by professional photographers on the front lines

- Strong magnesium-alloy body provides high reliability.
- Rear-side buttons important for operation are back-lit to enable menu operation in dark conditions.
- The camera's memory card format has been changed from CFast 2.0 to CFexpress, enabling faster data writing. In addition, the camera will include two memory card slots.
- AF Start button features a new internal device that enables fast AF tracking setting without users having to release their finger.
- Battery Pack LP-E19 and a newly designed power management system provide a greater number of shots per charge compared with predecessor models.

In termini operativi, un cambiamento è rappresentato dai nuovi supporti di memoria: sono state abbandonate le compact flash e cfast (queste ultime sono state adottate solo sulla 1dx mark II, tra le eos), in favore delle cfexpress.

Per il resto, mi ha sorpreso l'aumento di 5 volte del numero di scatti consecutivi effettuabil in raw. Visto che ne dichiaravano 170, con la 1dx mark II, ciò implicherebbe almeno 850 scatti: ora, dubito che vi possa essere qualche applicazione pratica della cosa, ma con un buffer simile si potranno salvare raw su entrambe le schede, senza temere che la fotocamera si fermi dopo pochi scatti.

Lieto che abbiano modificato l'interfaccia software per le unità WFT: vista la semplicità d'uso con le eos 1 precedenti, il commento che sorgeva spontaneo era un noto anagramma di tale acronimo...


3 commenti, 276 visite - Leggi/Rispondi


avatarCanon chiude Irista, la sua piattaforma di archiviazione/condivisione per foto e video
in Tecnica, Composizione e altri temi il 29 Ottobre 2019, 12:55


"Abbiamo deciso di chiudere Irista. Desideriamo ringraziarti per aver usato il servizio in questi anni e ci auguriamo che sia stato di tuo gradimento.
Il tuo account rimarrà invariato fino al 31 gennaio 2020, data in cui verrà chiuso. Dopo tale giorno, le tue informazioni e i tuoi dati verranno eliminati."

Probabilmente sarò l'unico a farne uso, sul forum, ma trovavo piuttosto valido il servizio. Anche perché, grazie ai bonus di incremento dello spazio di archiviazione acquisiti partecipando ad eventi Canon, avevo raggiunto 290GB.


5 commenti, 173 visite - Leggi/Rispondi


avatarCanon rf 70-200 f2.8 L is usm: incompatibile con gli extender?
in Obiettivi il 24 Ottobre 2019, 16:05


Come da oggetto,

mi aveva sorpreso che nell'annuncio ufficiale non avessero menzionato i moltiplicatori di focale (mi aspettavo che presentassero degli extender 1,4x e 2x rf), per cui ho visionato la specifiche sul sito di Canon Europa.

www.canon-europe.com/lenses/rf-70-200mm-f2-8l-is-usm-lens/specificatio

A quanto si legge, l'ottica non è compatibile con gli extender, così come accade con l'ef 70-300 f4-5.6 L is usm.

Pertanto, chi stesse valutando di sostituire un 70-200 ef con la versione rf, è bene che tenga in considerazione la cosa. Ovviamente gli extender ef non sono utilizzabili, dato che non si possono montare direttamente sull'innesto rf.



17 commenti, 224 visite - Leggi/Rispondi


avatarDa vinci resolve 16.1 beta
in Fotocamere, Accessori e Fotoritocco il 13 Settembre 2019, 15:25


Come da oggetto, hanno rilasciano la versione 16.1 beta 3 del programma.

www.blackmagicdesign.com/support/

Un elenco delle principali migliorie (versione studio):

"This software update improves editing and snapping behavior on the cut page, features redesigned timeline rulers, more accurate waveform drawing and introduces interface refinements that make it easier to see small cuts on the upper timeline. In addition, this update dramatically improves render speed for unchanged DNxUncompressed clips, includes additive compositing options to the light rays and glow Resolve FX plugins, improves sound library searches, addresses playback issues for clips with different sample rates, and more. New support for encoding AVC Intra 50, 100 and 200 has also been added to DaVinci Resolve Studio."


0 commenti, 45 visite - Leggi/Rispondi


avatarFile raw Canon 90d: test di imaging resource
in Fotocamere, Accessori e Fotoritocco il 10 Settembre 2019, 15:11


Come da oggetto,

il sito imaging resource ha testato la 90d con l'usuale scenario fotografico: sul sito sono disponibili i file raw.

www.imaging-resource.com/PRODS/canon-90d/canon-90dTHMB.HTM

Come immaginavo, la resa a sensibilità iso elevate non ha avuto alcuna miglioria, rispetto alla 80d: è anche vero che si tratta di uno scenario in cui l'illuminazione è uniforme e vi sono poche zone in ombra, quindi non molto critico. Saranno da valutare sul campo le differenze.

La sensibilità iso massima (gamma standard) della 90d arriva a 25600, contro i 16000 della 80d: come si nota dalla prove, tuttavia, a iso 25600 i file raw della 90d offrono una qualità d'immagine ben inferiore di quelli della 80d, a iso 16000. Si tratta quindi della usuale strategia di marketing di Canon, basata sulla comparazione dei file jpeg generati dalla fotocamera (con riduzione del rumore sempre più invasiva).


0 commenti, 61 visite - Leggi/Rispondi


avatarKelbyone.com: chi è iscritto?
in Tecnica, Composizione e altri temi il 12 Luglio 2019, 19:58


Come da oggetto,

dal 2015 seguo i corsi presenti su tale piattaforma di e-learning. Personalmente li trovo discretamente interessanti, e vi è anche la possibilità di porre quesiti agli istruttori, oltre che interagire con gli altri iscritti, discutendo su vari temi.


5 commenti, 312 visite - Leggi/Rispondi


avatarTest mtf Canon superteleobiettivi serie III e ottiche prodotte dal 2018 in poi: una (tardiva) spiegazione ufficiale
in Fotocamere, Accessori e Fotoritocco il 07 Giugno 2019, 14:04


Come da oggetto,

a partire dal 2018, Canon ha modificato i grafici mtf di tutte le ottiche a listino, senza fornire alcuna spiegazione. Purtroppo lo ha fatto solo sul sito giapponese, senza inserire alcun avviso sugli altri siti.

La cosa ha creato una serie di discussioni, soprattutto sui superteleobiettivi serie III, dato che dai nuovi grafici sembrava che vi fosse stato un peggioramento evidente, rispetto ai vecchi modelli (a meno di visionare il sito giapponese, nel quale anche i grafici mtf dei superteleobiettivi serie II erano stati aggiornati).

Già all'epoca avevo congetturato che avessero cambiato le metodologie di prova, dato che mi sembrava l'ipotesi più ragionevole. Per caso, oggi ho reperito l'articolo che segue, che spiega l'arcano.


tinyurl.com/y2tkdkf6

Cito solo la parte utile:


"2018: CHANGES IN CANON'S MTF EVALUATION METHODS, AND MTF CHARTS

In late 2018, coinciding with the introduction of Canon's RF lens series for full-frame EOS R-series mirrorless cameras, Canon optical engineers made across-the-board changes to the way they evaluate lens optical performance, and how it's displayed in MTF charts.

Fortunately, for consistency, Canon has updated the MTF charts for all current EF, EF-S, TS-E, MP-E, and EF-M lenses, so that meaningful comparisons can still be made by critical Canon users. Canon RF lenses, of course, are also graded on these updated MTF evaluation methods.

- Previous Canon MTF evaluation standards were calculated from criteria derived years ago from the film (analog) era, and not changed until late 2018
- Optical performance is now measured using more critical, demanding standards, based on digital imaging and the use of high-resolution digital image sensors in digital SLRs and mirrorless cameras
- Canon MTF charts will now only display MTF results at the lens' widest maximum aperture — previous Canon MTF charts displayed results at both maximum aperture, and at an effective f/8

Because the new, updated MTF measurement system used by Canon is based on stricter, digitally-oriented criteria, if you compare older and new MTF charts, any previously-introduced lens may seem as though some aspects of its MTF results are now lower than before. Rest assured this is because it's now being graded using more demanding criteria, and does not represent an actual reduction in a given lens' actual ability to deliver contrast or resolution than it previously did."

Come avevo ipotizzato, hanno adottato standard maggiormente restrittivi, che purtroppo si guardano bene dal dichiarare in modo dettagliato...


1 commenti, 171 visite - Leggi/Rispondi


avatarCanon rf 85 f1.2 L usm: intervista ai progettisti
in Obiettivi il 30 Maggio 2019, 21:28


Come da oggetto,

www.canon-europe.com/pro/stories/rf-85mm-f1-2l-usm-developers-intervie

Why did you choose an f/1.2 aperture rather than f/1.4?

Satoshi: "Although one may think there isn't much difference between f/1.2 and f/1.4 when just looking at the numbers, there is nearly a half stop of difference in brightness. Nearly 1.4 times more light is taken in, resulting in a whole new level in terms of design difficulty. A half stop difference may not seem like much, but when designing large aperture lenses such as f/1.2 and f/1.4, this half stop makes a huge difference in terms of difficulty of design."

Kaishi: "The combination of stunning sharpness in the focused areas and the extremely shallow depth of field of f/1.2 delivers unmatched images. Portraits that use the shallow depth of field of f/1.2 have a unique beauty. The widest aperture setting on the RF 85mm F1.2L USM delivers a beautiful bokeh quality not found on other lenses, and amazing resolution, embodying a new type of imaging expression in portrait photography. That is why f/1.2 was chosen."


How is the bokeh different from that of its EF-mount cousin?

Kaishi: "In terms of bokeh, a key point is that the minimum focusing distance is closer than that of the Canon EF 85mm f/1.2L II USM. The strong bokeh created by f/1.2 can be used to create new types of imaging expressions such as close-ups of areas decorated with jewels."

Satoshi: "We try to ensure the bokeh shape stays round at the edge of the frame, and at such a large aperture the lens size needs to be considerably larger. I believe to a certain extent that users can see the improvements to the bokeh shape being cut out in the peripherals [compared to the shape on a DSLR] . That's because there is no mirror box on the Canon EOS R to block the light rays, which is one of the causes of this phenomenon."

Can the bokeh get any creamier?

Tomohiko: "The strong bokeh produced by the large aperture of the Canon RF 85mm F1.2L USM is one feature of the lens. However, lenses with significant chromatic aberration suppression tend to have slightly clearer bokeh contours.

"Some users aren't fond of this clarity in the bokeh, for example when the leaves of a tree overlap in the defocused area. In this regard, we wanted to create a unique lens that delivers smoother bokeh quality, motivating us to start the development of the RF 85mm F1.2L USM DS with Defocus Smoothing (DS) coating. Although its specifications are basically the same as the Canon RF 85mm F1.2L USM, the DS coating will let users enjoy a softer bokeh quality."


How have you included a wide maximum aperture of f/1.2 while keeping colour fringing at bay?

Kaishi: "I sometimes shoot weddings, and I have always felt that colour fringing on white clothing does not represent what people really want in a portrait on such a special day. So with this in mind, we decided to utilise the greater freedom in design made possible by the RF mount."

Ishibashi: The most significant part in reducing chromatic aberration for the Canon RF 85mm F1.2L USM is the BR optical element. This is the second lens to use a BR optical element after the EF 35mm f/1.4L II USM. Canon possesses various optical materials such as fluorite, DO lenses and UD lenses, which correct various types of chromatic aberration, and we select which material is best depending on the optical system of each lens. The BR optical element has extraordinary dispersion properties compared to conventional optical materials, offering sufficient chromatic aberration effects, making it possible to achieve our goal of amazingly high performance. If we didn't have the BR optical element, we would have needed to increase the number of lens elements in the design, making the lens far too large.

Satoshi: "[Also] on this lens, in addition to the usual multilayer coating, Air Sphere Coating (ASC) is used to suppress ghosting and flare."

Is the autofocus up to the L-series lens standard?

Masami: "The Canon RF 85mm F1.2L USM lens uses the same ring-type ultrasonic motor (USM) as on the super telephoto lenses, which has the most powerful torque of any Canon lens, making focusing extremely fast despite the large optics."

Yasushi: "Although the AF drive speed from close-up to infinity is approximately the same as on conventional models, including a focusing range distance selector switch reduces the focusing time during normal shooting, such as portraiture, for more comfortable usage."

Why is the Canon RF 85mm f/1.2L USM longer than its EF mount counterpart?

Satoshi: "In terms of optical design, the total length is measured from the focal plane (the position of the imaging sensor or film). If you compare the EF and RF mounts, the lens mount is closer to the sensor on the RF mount than is the case with the EF mount. Because of this the EF version of some lenses can be shorter as the extra distance is taken up by the longer distance between the lens mount and the sensor in a DSLR camera. This naturally makes the RF version longer in total length to compensate for the difference in sensor-to-mount distance. An easier way to see this is comparing the size of the Canon RF 85mm F1.2L USM by itself and the Canon EF 85mm f/1.2L II USM with the Mount Adapter EF-EOS R attached. The difference is now smaller, and this is the difference you see when you mount the two lenses on the same Canon EOS R camera."

What other custom features are on this lens?

Yasushi: "We added a control ring, which is unique to RF lenses. Just as on the other RF lenses, aperture, shutter speed and other functions can be assigned to the control ring. The control ring was positioned towards the front as on previous RF lenses in consideration of balance during handheld shooting, and considering ease of operation."


How should photographers use this lens to speed up their workflow?

Kaishi: "We recommend that users try assigning exposure compensation to the control ring during portrait shooting. For example, when shooting portraits outdoors and the lighting conditions suddenly change, you can use your left hand to operate the control ring and adjust exposure compensation while simultaneously concentrating on using the shutter button with your right hand."

How durable is the RF 85mm F1.2L USM?

Kaishi: "What we were unwilling to compromise on was the pro specifications of toughness and durability that an L-series lens should have. We want professionals and enthusiasts to be able to hold on to this lens and use it for a long time without worry. The very front and rear of the lens surfaces are coated with fluorine, making maintenance easier than on the Canon EF 85mm f/1.2L II USM. Oil and moisture are repelled, and oil can be easily wiped off with a dry cloth without using solvents."


How sharp is the lens, really?

Kaishi: "When we were developing this lens, many performance tests were carried out repeatedly on a prototype. When shooting at the widest aperture setting using Eye Detection AF in portrait photography, our test photographers spontaneously let out cries of excitement when they saw how sharp the photos were.

"The Canon RF 85mm F1.2L USM thoroughly suppresses chromatic aberration and delivers photos with high resolution and high contrast in focused areas. We believe the particular appeal of this lens is in its widest aperture setting. We hope that users who have always stopped down a bit during shooting will enjoy the photos that can now be captured when shooting at f/1.2."


68 commenti, 2219 visite - Leggi/Rispondi


avatarCanon rf 85 f1.2 L usm, video di presentazione ufficiale, dati tecnici e grafici mtf
in Obiettivi il 08 Maggio 2019, 8:10


Come da oggetto,

youtu.be/SttD4F4_0Cw

L'obiettivo adotta uno schema ottico di 13 lenti suddivise in 9 gruppi, con una lente asferica, una UD e la tecnologia BR.

www.usa.canon.com/internet/portal/us/home/products/details/lenses/ef/s

L'ottica pesa, in base ai dati dichiarati, 1195 g, con una lunghezza di 117,3 mm: valori superiori alla versione ef, quindi. La distanza minima di messa a fuoco è di 85 cm.

Il prezzo di lancio, in America, è di 2699 dollari, ovvero 400 in più rispetto al 50 f1.2 L usm rf. Temo che in Italia saremo quindi attorno ai 3000 euro...


15 commenti, 556 visite - Leggi/Rispondi


avatarIncompatibilità flash Yongnuo e fotocamere Canon: soluzione alternativa
in Fotocamere, Accessori e Fotoritocco il 26 Aprile 2019, 16:32


Come da oggetto, Yongnuo produce prodotti spesso apprezzabili per le caratteristiche e il rapporto qualità prezzo, tuttavia come con tutti i prodotti di terze parti ci si trova a dover convivere con il problema della compatibilità: capita quindi che, lampeggiatori che funzionavano correttamente con fotocamere prodotte fino a qualche anno fa, non lo siano più con i modelli più recenti.

E' quanto mi è accaduto con il modello Yognuo yn-14ex e la mia 6d mark II: l'unità funziona correttamente con la 1dx e altre fotocamere coeve e, sorprendentemente, anche con la eos m50.

La soluzione che ho reperito è piuttosto semplice: se avete un trasmettitore Yongnuo recente, come le unità yn-622c II, tali dispositivi dialogano correttamente sia con le fotocamere Canon sia - ovviamente - con i lampeggiatori Yongnuo.

Ho quindi montato sulla slitta della 6d mark II l'accoppiata yn-622c II e yn-14ex e, come immaginavo, il tutto funziona correttamente (persino la compensazione dell'esposizione in e-ttl, impostata lato fotocamera): anzi, si guadagna anche una luce a infrarossi per agevolare la messa a fuoco. Per contro, il peso complessivo aumenta.

Pertanto, prima di rassegnarsi a sostituire flash Yongnuo con altre unità, conviene provare tale strategia.

Nel frattempo proverò a contattare Yongnuo HK per chiedere se prevedano degli aggiornamenti di firmware per il modello yn-14ex, in modo da correggere il problema.


9 commenti, 300 visite - Leggi/Rispondi


avatarBlackmagic Da Vinci Resolve 16 (beta)
in Fotocamere, Accessori e Fotoritocco il 09 Aprile 2019, 13:01


Come da oggetto,

hanno lanciato la nuova versione del citato software. E' ancora beta, quindi sono potenzialmente possibili problemi di ogni tipo, anche se sui miei dispositivi sembra funzionare tutto correttamente, almeno con le prove eseguite finora.

www.blackmagicdesign.com/it/support/


22 commenti, 960 visite - Leggi/Rispondi





7515 messaggi, 0 foto

  ULTIME 10 FOTO PUBBLICATE 

Invia Messaggio Privato   Aggiungi Amico


Hbd ha ricevuto 7766 visite, 0 mi piace

AMICI (0/100)



 ^

Versione per smartphone - juza.ea@gmail.com - Termini di utilizzo e Privacy - P. IVA 01501900334 - REA 167997- PEC juzaphoto@pec.it

www.juzaphoto.com - www.autoelettrica101.it

Possa la Bellezza Essere Ovunque Attorno a Me