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Messages - Rocky

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496
EOS Bodies / Re: 1D & 1Ds Rumors [CR1]
« on: April 08, 2011, 12:31:49 PM »
For me, the 1.3X crop on a FF sensor is a gimmick. By switching from FF to 1.3X crop will not by us anything except a smaller file size and a narrower angle of view. We can do the same thing at post process by cropping the FF picture.

497
EOS Bodies / Re: 7D MK2 APS-H??
« on: April 04, 2011, 12:51:49 PM »
It will be great to see a 7D with APS-H sensor for the following reason:
1.The size of the body can be smaller than a FF body (compared to 5D II).
2. with the same MP, it will have lower pixel density than the APS-C and hence better low light performance and better dynamic range.
3. With 17-40mm lense, it will give us a 22mm equilvalent focal length. at the same time to avoid the bad optical result at the corner when used on FF.
4. The price will between  the 7D and The 5DII (hopefully)

498
EOS Bodies / Re: 5D3, 1D5 and 1Ds4 Timeline [CR1]
« on: March 30, 2011, 01:37:54 AM »

Which isn't an issue with a reputable airline.


Have you  ever flown  a three letter airline started with 'S" that is based in northern Europe?? It spell out clearly as one peice of carry on with weight limit of 8 Kg. This airline is just as reputable as Lufthansa. Did you  check the web site of Lufthansa lately??? It also have the same limit without additional allowance for lap top or camera. You got through without problem may be due to: 1. you are lucky, 2. you did not fly recently. But we should not bet on our luck all the time.

499
EOS Bodies / Re: 5D3, 1D5 and 1Ds4 Timeline [CR1]
« on: March 29, 2011, 10:34:32 PM »
Just want to point out that now some European airline limits the carry on weight to be 8 Kg (17.5 lbs).  The camera gear alone will be that much weight. There is no allowance left for lap top, power supply, external hard drive etc.  A bunch of high capacity CF card (or SD card) is the best way to go, reguardless  what camera system that you have.

500
EOS Bodies / Re: Canon Doesn't Need a Compact Camera System
« on: March 19, 2011, 07:09:27 PM »
IMO the most sensible thing to do would be to have an EF-S compatible system, similar to Sony NEX.

Canon would sell more EF-S lenses, and folks with DSLR bodies might be tempted to pick up a mirror-less body as an addition to the kit.

A mirror-less body coupled with plastic lenses like 18-55 would be pretty compact and light.

Now, Canon, let's please see some light EF-S primes!
The mgic word here is "compact  camera system". So in order for it to be compact, the camera needed to be a lot thinner than the existing EOS DSLR. Also due to thinner body, the lens can be made shorter  and  smaller.  Also the EF-S or EF lens mount is relatively big. That will also defeat the "compact"  purpose. So the new system needed to be with all new system lens to make it compact. However, an EF-S/EF lens adapter should be available for people that do not care about size and want to use the existing lens.

501
EOS Bodies / Re: Canon Doesn't Need a Compact Camera System
« on: March 19, 2011, 05:20:02 PM »
I can understand why  Canon is hesitate going into the "mirrorless"/ "EVIL" business. They have already have the G12 and S95 for the high end non-professional area. So the new "mirrorless" needs to be in the professional area (read it as expensive). Let us have a look in what most of the existing "mirrorless" models (except Leica M9)now. They  all have auto focus with about 0.3 to 0.5  second shutter focus delay ( same delay for most of the point and shoot). Now howmany professional will or can live with this kind of delay?? Leica M9 takes a totally differeent approach. IT uses manual focusing with built in range finder.So thes hutter delay will be less than 0.1 second. However. This will make the lens and body focusing mechanism to be very complicated. That is why the lens and body are so expensive. Also how many people nowadays knows how to or want to use a range finder for focusing?? Until Canon can come up with a fast auto focusing system based on "Live View", Canon will be hesitate to go into the high end morrorless business.

502
EOS Bodies / Re: Canon Doesn't Need a Compact Camera System
« on: March 18, 2011, 01:56:06 PM »
I agree with CR. I think Canon need to come up with TWO mirrorless camera that will complete with Leica M9 and the Fuji FX100. The first one is for pro's with the need for lens changing capablity and FF. The second one is for simplicity and smaller size with APS-C sensor.

503
EOS Bodies / Re: The 7d with an aps-h sensor!!!!!!!!
« on: March 07, 2011, 01:10:25 PM »
Olympus has an acceptable swivel screen, something akin would work for a7DII/5DIII.

Ad APS-H, mirrors and LV: how about dropping the rigid EF/EF-s seperation? Give the mirror also a powerless resting MLU-mode that retracts a locking pin that would prevent bad matching between modes and lenses. For the viewfinder a beam splitter that merges/switches between the images from the mirror and a display would be an option that also opens a door for lots of other uses. Or simply use just the rear display as a screen for EF-s lenses. With the 10-22 it wouldn't hurt and with the standard zooms we're at least close.
Bonus points for merging the AF sensors into the imaging sensor, thus allowing PDAF in LV and movie modes. :)
EF-S lens will not work right with APS-H sensor due the the image circle of the EF-S lens  is not large enough for the APS-H sensor.

504
EOS Bodies / Re: 60D & 7D Rebates coming February 20
« on: February 20, 2011, 12:01:12 PM »
Amazon  is still having 7D at $1457 and 60D at $888

505
EOS Bodies / Re: canon 600d or 60d?
« on: February 19, 2011, 04:51:20 PM »
For a difference about $200 (not counting rebate). I definitely will vote for 60D. The following four items will make it worth to spend $200: 1. Much better hand grip (a lot more comfortable in the hand) 2. Penta prism ( brighter image in the viewfinder) 3. extra control wheel at the back ( a lot easier to set function). 4. LCD panel on top ( a lot easier to set and know the camera setting). For people that do not want to change the lens most of the time, 15-85mm will be a good choice or for people that hardly uses long lens, 17-40 f4.0 L lens  (27 to 66mm 35mm equilvalent) will be a good alternative.

506
Here is a Canon white paper about manufacturing sensors.

I've always wondered how large part of the cost of the camera that is the sensor. Does anyone know? It seems to me that if you buy a 5D a much larger part of the money goes to finance the sensor than if you buy a 7D.

The white paper says that a full-frame sensor can be 20 times more expensive than APS-C. The 5D is about $2500 and the 7D $1500. Is the 5D sensor as much as $1000, or even more?


If you use the number from Canon white paper. It is about right. The Cost of CMOS wafer is about $800, throw in the micro lens, AA filter, etc. that may round up to be $1000. 200 site per wafer for APS_C. that will be $50 per APS-C sensor.  FF sensor is 20 times more. That will make it to be $1000 per sensor. However, we should quetion the actual site count of the APS_C per wafer. 200 sound too high. 75 is a more realistic number. (Any- one can work out the number by himself). So the white paper is trying to justify the high cost of the FF DSLR

507
At the risk of violating my own rule about not discussing pixel size I wonder which is more likely to occur: cost reductions in the manufacture of sensors so as to allow larger sensors at less cost or improvements in imaging technology to allow improved image quality from smaller sensors.


CMOS process is a relative stable process and  has been around for a long time.. We cannot expect any substantial cost reduction in sensor from the process alone, except moving from 8 inch wafer to 12 in wafer. With  the same amount of physical work (mostly done with automation), a little more chemical, and a slight modification in process and you end up twice as much sensor.
As for improving the sensor performance, we should have high hope. just look at the latest sensor from Nikon( Sony). However, we have already pushed beyond the capability of the lens resolution with 18MP APS_C sensor.

As a foot note: Most other electronic device are enjoying huge cost reduction in the last 40 years due to the advance in processing technology and cost reduction in the processing itself and hence the internal device on the silicon is getting smaller and smaller and resulted in the actual silicon in each IC is getting smaller and smaller and hence it is getting cheaper and cheaper.  Unfortunately. This  does not appy to the DSLR snesor. The sensor size is fixed. So there is no cost reduction in shrinking internal device. Instead we end up with higher pixel count. We have moved from 2MP (APS-C) to 18MP (APS-C) in the last 15 years or so.

508
EOS Bodies / Re: T3 Sensor - question...
« on: February 14, 2011, 06:48:23 PM »
After reading more on different photo sites and forums here. I have the following thought:
1. There is s "slight" improvement between the 18MP and 10MP. But is the improvement worth the files being twice as big.
2. The improvement in the 18MP over 10Mp is it due to the sensor itself or due the processor and  14 Bit vs. 12 bit color  depth? Also the improvement shows after the 18MP is down sized to be 10MP.
3. Everything that I have read says the existing lenses (even the L lenses) cannot resolve more than 14 MP on APS_C. How true is it???
4. Based on the DXOMark data, the lens/sensor combination can only resolve about 50 lpmm. That translates to be about 3.4 MP. What is wrong with this picture??
5. If #4 is true, then the debate between 18MP and 10 Mp is almost a waste of time in terms of resolution.
6. One of the site compares different sensor by scaling them all up to 40MP. This is not  a fair test. The 18MP will always MUCH better than the 10 MP in terms of sharpness.
I am not trying to take side. Just hope someone in this forum can shine some light on the above points.

509
EOS Bodies / Re: T3 Sensor - question...
« on: February 13, 2011, 10:28:21 PM »
Last night I was looking at the noise performance (only) of 40D, 7D and 60D with DXOmark. At ISO1600 and 3200, 40D is the best performer by  a slight margin. This says a lot about the noise and pixel size.

Sorry, I was looking at the raw data(screen mode). The print mode does give the 18Mp sensors(7D and 60D)an edge on the high ISO noise. Thanks for all the advices of using DXOMark.

510
EOS Bodies / Re: Godwin's Law for Digital Photographers
« on: February 13, 2011, 04:29:21 PM »
Quote
I'm going to vote agree on one condition/criteria.. if there is a thread started *specifically* to discuss the merits or lack thereof of MP counts, then said thread is immune from said action. 

Works for me.
I would like to add that personal attack should be banned.

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