July 31, 2014, 12:10:11 AM

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Messages - zim

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46
PowerShot / Re: New PowerShot & EOS Cameras to Offer DOF Control?
« on: May 05, 2014, 04:50:00 PM »
Sounds to me like a mode in which the camera determines the subject near and far distance and sets aperture to ensure all subjects are in focus.

take for example a shot of a group of people.  face detection could be used to determine the distance to the subject closest to the camera and the suject farthest from the camera, then select the aperture that mathmatically satisfies the DOF with that lens.

Sounds like a cool feature for consumer level cameras or even for shooting video if it was dynamic enough to adapt to the changing environment in real time.

My original EOS650 had that.

My old 500D still has it  ;D

47
EOS Bodies / Re: New Sensor Technology Coming From Canon? [CR1]
« on: April 30, 2014, 02:27:18 PM »
Why do the etchings always have to go in the same direction?
I guess it's how are they cut out? what do they use, a saw  ;D

Well, there is no specific reason why they couldn't etch some additional sensors in the perpendicular direction, but it would be costly. The way sensor fabrication works is by etching the silicon with extreme UV light via a template. The template is oriented in a single direction. The wafer is moved underneath the light beam so that multiple sensors can be etched. Etching of a single sensor is a multi-step process, with various steps involving masking, etching, dissolution of masks, more etching, doping and layering of new materials, masking, etching, etc. This stuff has to be precise to the level of a few nanometers at most, so it is entirely automated. Rotating the wafer to etch additional sensors in a different direction introduces a source of error that could hurt yield.

Fascinating, must be very impressive to watch, though I guess not actually viewable. Thanks for the enlightenment!

Regards

48
EOS Bodies / Re: Just discovered on swiss canon web page EOS 1200D
« on: April 30, 2014, 08:11:46 AM »
Yeh but the Swiss one is made of chocolate  ;)

49
EOS Bodies / Re: New Sensor Technology Coming From Canon? [CR1]
« on: April 30, 2014, 08:07:18 AM »

Surface area of FF => 864mm^2
32429/864=47.41

If they can only get 20 FF sensors out of that, they have about 58% losses. 

This is an 8 year old white paper and nobody mentioned these mistakes before?


That's very interesting if indeed that does translate to about 58% full frame sensor losses per wafer, even if it was 8 years ago.


I made a mistake (maybe Canon has a job offer ;-)), corrected it in my last post. It should be

Surface area of FF => 864mm^2
32429/864=37.5

If they can only get 20 FF sensors out of that, they have about 47% losses.


It isn't exactly 47% loss. It's 64% of the area is actually used to print FF sensors. If this diagram is any indication, then they actually ETCH exactly 24FF, or 80APSC on a single 200mm wafer:



The actual losses would be out these numbers...so accounting for defects and whatnot, actual FF yield would have to be less than 24, and actual APS-C yield would have to be less than 80. Assuming they actually get 20 FF out of 24, the loss is 16.7%.

That assumes that the article was clear about the size of wafer used to produce APS-C sensors...which it is not. Since a 300mm wafer can handle about 212 APS-C sensors, and since the article states that around 200 APS-C sensors are made from each wafer, it makes sense that Canon is manufacturing APS-C sensors on 300mm wafers, rather than 200mm wafers. Either way, they clearly have a higher yield off smaller sensors.



Why do the etchings always have to go in the same direction?
I guess it's how are they cut out? what do they use, a saw  ;D

Regards

51
Canon General / Re: Something to lighten the tone :-)
« on: April 27, 2014, 08:54:42 AM »
wonderful thanks for posting

52
EOS-M / Re: Canon EOS M3 in Q3 of 2014?
« on: April 16, 2014, 07:52:40 AM »
Reading many posts here I think this forum should be really renamed in canonbashers.com  ;)

Forget about those bulky mirrorless things, that's only intermediate technology 2.0 (with loud bangin' mechanical shutters, how primitive) after DSLRs. My personal prospect for the future of digital photography and videography is eye-implant surgery. Since more and more male hipster google glass wearers are beaten up by women, as happened recently in Frisco, the technology has to be hidden right in the eyes. I can imagine a mesh like retina implant that uses the space between the photoreceptor cells. Micromike implants in the ears. Wireless readout of data for sharing, this technology will of course include an in-eye 3D-projection of pictures and videos on demand. Telephoto simply by using binoculars.

So, how about a new Eyeos implant camera line, Canon? C'mon dumb Google...


I have a photographic memory so I can skip that surgery stuff too. Come on Canon imagineer something that allows me a direct upload link to the intercloud.... by next week please or your doomed

.... I'm gonna sing the doom song now  :P



53
Third Party Manufacturers / Re: How to Annoy a Photography Snob
« on: April 03, 2014, 02:46:48 PM »
There are always good reasons to shoot in various modes.

P-mode is fantastic when run-and-gunning a live event where light is constantly shifting as well as the subjects. Where shutter speed or aperture effects aren't important to the shot.

A-priority is great for various reasons especially when trying to control depth-of-field. Or when trying to keep the ISO below a certain point.

T-priority is wonderful when you need a specific shutter speed for either greater sharpness or blurriness of action.

Manual also has it's place. I use this frequently as well.... I shoot on the 5D3 and will set my aperture for the depth-of-field I prefer, set my time to a minimum of 60 (for motion shots) and Auto-ISO to let the camera adjust for the lighting. This way I have control over the look. The 5D3 is great in low-light situations, so the manual feature with auto-ISO comes in very hand at this point.


I think you just annoyed a whole bunch of them right there  ;D

54
EOS Bodies / Re: New DSLR and PowerShots in May [CR2]
« on: April 02, 2014, 08:14:16 AM »
750D, maybe a significate change to the way the spinny thing spins  :P

55
Third Party Manufacturers / Re: Sigma Announces Acquisition of Samyang
« on: April 01, 2014, 01:48:15 PM »
thankfully this b****y stupid day is at an end  ::)

56
This morning it was raining a ton but I was using a plastic bag to cover my 6D as I shot a quidditch tourney. As time went on, my playback button stopped working...

I suspect evil magic is afoot, and the smart money is that Team Slitherin had something to do with it.

Not a problem a simple Impervius spell will sort things

 ;D ;D ;D ;D

57
EOS Bodies / Re: New Full Frame Camera in 2014? [CR1]
« on: March 26, 2014, 09:37:40 AM »
wow it's going to be a busy ol last quarter with all these new cameras and 'year of the lens' lenses.  ::)

58
There are two threads in CR which just keep me coming back for more, this and 'Show your Bird Portraits'

The photography in both are wonderful.


Keith, absolutely lovin your photography. Your thoughts on The Galloping Ghost are very poignant.
I remember when the great Mark Hanna died, a hero of mine, it's a sober reminder of the fragility of these beautiful aircraft and the passion of the pilots that fly them.

On a lighter note that ISS image is superb!
http://www.kbvp.com/photo/iss-international-space-station-moon-flyby-photo-instructions

Regards

59
See, really is 'Year of the lens'.............. doubters  ::)

60
I'm fairly certain that the first picture is not a B-24 Liberator but an Avro Lancaster.  The cockpit glass is not correct for the B-24, the B-24 did not have a Gun turrent on the top in the main body, and the 4 engines in the picture are Rolls Royce Merlins which were on the Lancaster. If you Google B-24  Liberator pictures and Avro Lancaster pictures you can see the difference.

In any event great looking pictures.


There's no dooubt its a Lanc, http://www.raf.mod.uk/bbmf/theaircraft/lancasterphanofruhr.cfm
Later clasified BQ-B
Love the ME and YAK shots
The air to air shots on this thread are absolutly stunning

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