Canon 7D - now official  

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Paul
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Canon 7D - now official

by Paul » Tue Sep 01, 2009 3:36 pm

today the infos about the 7D DSLR are released on Canons websites

18MP, but bracketing is limited to +-3EV
Last edited by Paul on Tue Sep 01, 2009 3:36 pm, edited 1 time in total.
Paul

close, but no cigar ... ... ...

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by [bo] » Tue Sep 01, 2009 3:59 pm

There's even a preview: http://www.dpreview.com/previews/canoneos7d/

It's like 5D, but has smaller sensor and has a flash. And 8FPS shooting! That, along with the HD movies, makes it a perfect family camera with a prosumer dad :) I guess that's as good as it gets in the APS-C class and it can save you some cash on the lenses front.

I'm still getting the 5DMk2, as soon as I gather the pile of gold it costs...
Some of my panoramas, posted in the Autopano Pro flickr group.

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by bigwade » Sat Sep 05, 2009 12:03 am

Paul wrote:but bracketing is limited to +-3EV

No Paul, it's ±2EV
as most Canon camera's, but there is a solution:
http://www.youtube.com/hdriblog
http://promotesystems.com/products/Promote-Control.html
300$ :-(

I doubt there will be more details at a 7D with a sig 8 than a 450D
I can hardly see differences between the 400D and 450D with this lens and a 7D won't help
Go for a 5D2 for just 2-300 Eu more or go for a second hand 5D (7-900 Eu) + Tokina or Sig 15.
grtz
Frank

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Paul
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by Paul » Sat Sep 05, 2009 7:44 am

bigwade wrote:
Paul wrote:but bracketing is limited to +-3EV

No Paul, it's ±2EV

Canons websites are inconsistent

german website specs: Belichtungsreihen (AEB) 3 Aufnahmen; +/-3 Blenden in halben oder Drittelstufen
german website flash 7D special: +- 2

US website:
AEB ±3 stops

more here: http://forums.dpreview.com/forums/read.asp?forum=1000&message=32867781
Paul

close, but no cigar ... ... ...

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by Castillonis » Thu Oct 01, 2009 12:47 am

I handled a Canon 7D for about one minute today. The larger eyepiece and viewer along with the increased number of focus points is a fabulous improvement. I saw another person using the leveling feature.

The light meter displays +/- 3 EV ( manual page 38)
The exposure bias may be set up to +/- 5 EV, but only +/- 3 EV will be displayed ( manual page 104 )
The auto exposure bracketing may be separated by +/- 3 EV in 3 exposure brackets ( manual page 105 )
( too bad they did not increase the number of exposure brackets. Who cares about more separation. I want more brackets )

I am skeptical about the noise and dynamic range when Canon crams 17.9 megapixels on a APS-C sized sensor. The camera probably has the improved coverage microlenses, improved light transmission infrared filter, better photodiode design, and better signal processing algorithms from the 5D mark II technology. If you use a medium sized RAW at 10 megapixels instead of a large 17.9 megapixel RAW it probably will not improve the signal to noise ratio or the dynamic range. The photodiodes will be smaller due to the greater number of pixels and additional data paths needed to transfer captured charge information off of the chip. A photodiode that is smaller has less capacity for charge and is more susceptible to noise. ( If the same photodiode design is used ) Earlier Canon image sensors had added preamplifier's for each photodiode before analog to digital conversion which helped with different DC offsets at different photodiodes.

** 1. http://www.imaging-resource.com/PRODS/E7D/E7DA.HTM
2. http://www.devicemag.com/2009/09/01/canon-eos-7d-high-end-digital-slr-unveiled-today/
3. http://www.dpreview.com/previews/canoneos7d/

Google Language tools

Je me suis occupé un Canon 7D pour environ une minute aujourd'hui. L'oculaire de plus en spectateur avec le nombre accru de points de focalisation est une amélioration fabuleux. J'ai vu une autre personne en utilisant la fonction de nivellement.

Le compteur affiche light + / - 3 IL (page de manuel de 38)
Le biais d'exposition mai être mis en place à  + / - 5 EV, mais seulement + / - 3 IL sera affiché (page de manuel de 104)
Le bracketing de l'exposition automatique mai être séparés par + / - 3 IL en 3 tranches d'exposition (page de manuel de 105)
(Dommage qu'ils n'ont pas augmenté le nombre de tranches d'exposition. Qui se soucie de la séparation sur plus. Je veux parenthèse)

Je suis sceptique au sujet du bruit et une gamme dynamique où Canon bourre 17,9 mégapixels sur un format APS-C de capteurs. L'appareil a probablement le microlentilles amélioration de la couverture, la transmission améliorée filtrent la lumière infrarouge, une meilleure conception photodiode, et de meilleure qualité des algorithmes de traitement du signal de la technologie 5D Mark II. Si vous utilisez un RAW de taille moyenne à  10 millions de pixels au lieu d'un grand RAW 17,9 mégapixels il ne sera probablement pas à  améliorer le rapport signal sur bruit ou de la gamme dynamique. Les photodiodes sera moindre en raison du nombre plus élevé de pixels et d'autres chemins de données nécessaires pour transférer les informations saisies charge hors de la puce. Une photodiode qui est plus petit a moins de capacité de charge et est plus sensible au bruit. Préamplificateur (Si la conception même photodiode est utilisé) Au début de capteurs d'image Canon avait ajouté pour chaque photodiode avant la conversion analogique-numérique qui a contribué avec des décalages différents DC à  photodiodes différentes.

** 1. http://www.imaging-resource.com/PRODS/E7D/E7DA.HTM
2. http://www.devicemag.com/2009/09/01/canon-eos-7d-high-end-digital-slr-unveiled-today/
3. http://www.dpreview.com/previews/canoneos7d/
Last edited by Castillonis on Thu Oct 01, 2009 1:05 am, edited 1 time in total.

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by GURL » Thu Oct 01, 2009 6:19 pm

Castillonis wrote:I am skeptical about the noise and dynamic range when Canon crams 17.9 megapixels on a APS-C sized sensor.

What if one uses a longer lens, shoots more source images and select a lower percentage while rendering to get a lower noise (and use PS shadow/highligh tool or an equivalent to brighten low values) ?

Possibly, a 58% rendering (rather than 100%) would compensate for the tiny pixels noise. I propose 58% for rendering because .58 x .58 x 17.9 mega-pixels = 6 mega-pixels and because 6 MP presently looks like an absolute minimum for any camera.

Anyway, thought a 2 EV improvement is worth to have, my own experience is that a 4 EV improvement is much more useful: using auto exposure, a nearly systematic -2 EV correction for sky images and APP LDR mode with manual anchors, I can avoid bracketing for nearly all my 360° x 180° panos. I use a rather strong color noise correction for my Fuji S5 RAW images, use and abuse of Camera Raw "Recovery" and "Fill Light" cursors ...and ignore luminance noise when it's there ;)
Georges

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by marco-pano » Thu Oct 01, 2009 7:06 pm

GURL wrote:...Possibly, a 58% rendering (rather than 100%) would compensate for the tiny pixels noise...

I remember some time ago, probably before v2.0, some test made by DrSlony showing that reduction before rendering was not as accurate than rendering at 100% then resize under image editor. Alexandre said to have improved APP but can't get the best. That's why I try to render first at 100% then resize when needed.
I guess I should test again now APP accuracy with downsized rendering.
Marco, Paris ;)
Canon EOS 40D, EF-S 10-22, EF 24-105 LIS, EF 70-200 LIS - Canon G9 (wide-converter)
DxO v7.5, Autopano Pro 2.6, PS CS5 and time

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by hankkarl » Thu Oct 01, 2009 7:14 pm

The camera is a system with lens and sensor. If your resolution is already limited by the lens, a smaller photosite doesn't make things better. And IIRC, the 15MP sensor outresolved some of the L glass.

longer lens, more source images, and downsizing may help, but IMO there's nothing like a bigger photosite. This also may give greater dynamic range

Perhaps the race to more MP is just a way for Canon to sell more L glass?
Last edited by hankkarl on Thu Oct 01, 2009 7:18 pm, edited 1 time in total.

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by jamma-pcb » Fri Nov 20, 2009 1:33 am

Im impressed with the quality of the 7d its near on par with the 5d. But when you consider the 7d is faster at 8fps and printable quality at iso 6400 its a good thing. the video modes are more flexible to than the 5dmkii. Its also about 700 quid cheaper the 7d. The full frame is nice. But between a full frame cam print and a cropped sensor its neither here or there. I use a Olmec op1000 printer and the difference cannot be seen unless its pixel peeping time. At true 600 ppi max resolution on a 9x6 the real advantage of the 7d for me is the 8fps. Rather get the shot than miss it on a slower camera.
But its all down to the type of photography I guess.

Model photography 5d mkii. Super large prints 5dmkii. True Ultra Wide photos.
Not as fast for writing to mem cards

Fast, sports, zoom, wildlife and a4 to a3 prints the 7d.
Faster than 5dmkii for writing to mem cards

Also if you already have a cropped sensor and a few Eps, APS-C lenses its saves on that part to.

The 100-400mm L lens I use should work wonders with the extra 8 million pixels I can still crop and print with decent res and effectively increase the zoom to an equiv 1100mm lens (with the 1.4x extender) about 1500mm. Sweet! The extra iso is also a huge benefit to this type of lens in lower light conditions.

Turns and roundabouts really.
Last edited by jamma-pcb on Fri Nov 20, 2009 1:38 am, edited 1 time in total.

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by gkaefer » Mon May 17, 2010 1:46 pm

the HD video capabilities of the 7D

I work for one company in austria engaged in 3D animation...
...One of the latest works is the 3D/animation and motion capuring part for the 2010 Eurovision Songcontest Video of Romania, which was actually shot with a Canon 7D ;-)

the final video: http://www.7reasons.at/template1/x/language/de/catnr/1/catid/194/navart/nav1/motioncapture_eurovision.htm
the making of: http://www.7reasons.at/template1/x/language/de/catnr/1/catid/195/navart/nav1/motioncapture_eurovision.htm
(7d is shown in some shots, the 3D motion capuring suite used etc.)

Liebe Gruesse,
Georg

PS: 2010.05.30 / 0:50 ;-) Congratulation Paula & Ovi to place three...
Last edited by gkaefer on Sat May 29, 2010 11:53 pm, edited 1 time in total.

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by gkaefer » Fri Jul 02, 2010 11:13 am

my collegue is currently reporting an "overheating alert" if the canon 7d is used for HD filming outside with 28-35 degrees outside temperature...
its alerting but filming is not interupted...
Georg

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by peterpan » Mon Jul 05, 2010 1:31 pm

There is a firmware update 1.21 addressing this issue.
Last edited by peterpan on Mon Jul 05, 2010 1:33 pm, edited 1 time in total.


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