May 24, 2017, 11:30:35 PM

Recent Posts

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31
EOS Bodies / Re: Canon EOS Rebel SL2 Coming in September [CR2]
« Last post by Don Haines on Today at 05:48:14 PM »


Digital imaging sensor is the single most expensive component of any camera so sharing same sensor across multiple models in any generation is smart way of saving money on production. Sharing sensor has nothing to do with crippling which happens with functionality of camera(memory card slots, video features, customisation options, etc...) which according to Canon hampers sales or more "expensive" cameras. As the sensor gets bigger, so does the production cost and ratio of faulty sensors to usable sensors coming out of fab. Hence the reason why larger FF cameras dont seem to share sensors across multiple models.

I am wondering whether the current situation is a little different than it has been in the past, because Canon seems to be in the middle of upgrading all of its cameras to dual pixel technology with on chip ADC, and doing so rather quickly.  If the 6DII is announced in July and the SL2 in September, that would only leave the 5Ds(r) and the 7dII (and maybe some M's) with the older sensor technology.  The past pattern of not sharing sensors may have reflected a more gradual rate of technology introduction, with longer periods between the introduction of the new cameras.  If they are upgrading everything as quickly as possible, why not share sensors?

the sensors need different readout lane numbers because of fps performance. a dual DIGIC chip is different than a single DIGIC chip reading out the channels as an example.

canon really has never shared the exact same sensor across too many cameras.  they always tweak it for specific cameras and there is always ongoing changes to the sensors as governed by what patents clear globally that canon can leverage.

It does also depend on what you call the "same" sensor.

My wife worked for Intel and AMD (actually helped work on the chip in the XB1 and PS4).  Chips of all sorts are constantly receiving tweaks, minor and major, to improve one or more of yield, reliability, power, or a host of other things.  These chips show up as the exact same SKU, with the exact same name, and are only differentiated by a faint etching on the heatspreader (or in the old days, on the surface of the die itself).  Back when I had more time and less money, and overclocked my CPUs, certain steppings were considered much more desirable because of having more overhead.  I can almost guarantee that the last FF 22mpx sensor built for the last-assembled 5D3 is greatly different from the first, when examined closely enough.  Is that difference lesser or greater than the difference between the 18mpx crop sensors that went into all the various Canon bodies that had 18mpx crop sensors?  I don't know, nor do I know how much difference is allowable to be considered "the same".  Just consider that if you pick up two identical Core i7s from the shelf, one could very easily be "different" from the other.

And then we have the cases where two chips with the same part number come from two different plants......
32
Travel / Re: Advice wanted for trip to upstate New York.
« Last post by BillB on Today at 05:45:34 PM »
I prefer the Canadian side of Niagara Falls.  There is an overlook at the top of the Falls on the Canadian side that is really impressive.  Going into Canada (and getting back into the US) will require a passport for everybody present though.

I am lucky enough to be near a library that is big enough to have a pretty good collection of travel guides.  There are several different companies that put out travel guides.  If I am going to be spending some time in a new place, I like to spend some time looking through the travel guides beforehand and check a couple out to take along with me.  Very helpful in finding interesting places to visit, and good places to eat.   Also, you might check the New York Highway Dept website to see if you can get a map with Scenic Byways identified.
33
Canon General / Re: Has anyone else been shut down?
« Last post by Don Haines on Today at 05:39:49 PM »
It's all about tactics...

Wife: "Is that a new lens?"
Me:   "No, I've had it for a while but don't use it much."  "Oh, is that a new purse?"

It is about tactics.....

She is about to get a 5D4.... how do I convince her to let me borrow it?
34
Travel / Re: Advice wanted for trip to upstate New York.
« Last post by Don Haines on Today at 05:33:31 PM »
If you take the maid of the mist, you REALLY REALLY REALLY!!! Want a waterproof camera. Water will be running off of it...... think of it as photography while taking a shower......

If you are interested is some landscapes, try the Adirondaks, there are some nice day hikes, including some really short ones (an hour or so) with decent views, but this time of year bring some bug dope...... August will be fine for bugs, but it will be hot and you will need lots of water.....

The other advice is to avoid touristy places on weekends.....
35
I'm hoping for a TS-E macro.

I'm not sure we'll see one, or if we do, how useful it will be.  If we do see one, I'd expect it to be a relatively short focal length.  More tilt is generally required with closer subjects and more tilt is generally required with longer focal lengths, which has some obvious implications for using tilt with a macro telephoto lens.  Somehow I doubt Canon will solve this with a view camera back, which may be the only way to achieve the required degree of tilt.
Nikon has the PC-E Micro-NIKKOR 85mm 1:2.8 D and PC-E Micro-NIKKOR 45 mm 1:2,8 D E, both with 1:2 macro. Not 1:1 but still better than what Canon has. I have not found any numbers for the maximum tilt of the plane of focus at MFD, though.

I guess greater possible tilt for macro is one of the best reasons for a shorter flange distance in a mirrorless camera.

What if you paired an extension tube or 3 with one of the TSE lenses? Has anyone here tried that? I don't have any TSE lenses or I would try it.

SLR's really aren't designed for tilt lenses, if you look at the range of tilt you get with an slr format tilt lens (around 6-10 degrees) compared to a field cameras movements ( 20-45 degrees) you begin to understand the comparative limitations of them. The mirror box is a long tube and it doesn't take much tilt for that tube to start casting a shadow on the sensor, an extension tube would make that even worse so isn't a very practical idea.

The main 'issue' I'd foresee for a tilt macro lens is the very limited tilt effect you could get at close distances with the range of tilt an slr tilt lens can achieve. You are going to want very short 'J" distances and that is only possible with large amounts of tilt.
36
**** Good news!: EOS 1DX Mark II will now get the same C-Log update option too!  Thank you Canon ****

What's your source?

Ditto.

2x ditto. Google doesn't know anything about it...
37
Animal Kingdom / Re: Show your Bird Portraits
« Last post by Jack Douglas on Today at 04:32:14 PM »
Kind of annoying when "notify" doesn't let me know for a few days.  Great shots everyone!

Nothing special, but a new one for me - Clay-colored sparrow.

Jack
38
EOS Bodies / Re: Canon Full Frame Mirrorless Talk [CR1]
« Last post by zim on Today at 04:30:05 PM »
Well my takeaway from all this is that ignorance really IS bliss   :'(


If you fully understand that the dof in a print changes as you move closer or further from it then you know what you are talking about, if you can't get your head around that concept then you really need to read the link.

How do my prints know I'm looking at them.... now I'm just scared  :o

Just think about a print size of 6x4", where your image is super sharp and in focus. You're happy. Then you print it 10x8", and think "damn, my subject's not as sharp as I though it was". Then you print it A3 and realise you actually missed focus of your subject.

It's the same with dof in terms of magnification and viewing distance. If you have an image with shallow or shallowish  dof, the dof that you see will vary depending on print size / viewing distance.

Clear as mud  ;)

I thought he was talking about those pictures where the eyes seem to follow you.  Creepy!   ;)



 ;D Ha Ha

Looking at your GIF it is apparent that Mona is having a look around her own painting to assess the DOF. From that viewing distance on (in)  the original sized painting I hope Leo got all his important bits in sharp focus !

LOL good one

Actually Sporgon, thanks for that explanation what you describe does make sense now using those terms!
I appreciate your attempt at educating one of the great unwashed :)
39
EOS Bodies - For Stills / Re: 80D Single-Point vs. 6D Single-Point?
« Last post by Cory on Today at 04:23:00 PM »
Not bad... :)
Only if you don't factor in BMW mechanics.
NEVER AGAIN!!!!!!!!!!!!!!!!!!!!!
40
I'm hoping for a TS-E macro.

I'm not sure we'll see one, or if we do, how useful it will be.  If we do see one, I'd expect it to be a relatively short focal length.  More tilt is generally required with closer subjects and more tilt is generally required with longer focal lengths, which has some obvious implications for using tilt with a macro telephoto lens.  Somehow I doubt Canon will solve this with a view camera back, which may be the only way to achieve the required degree of tilt.
Nikon has the PC-E Micro-NIKKOR 85mm 1:2.8 D and PC-E Micro-NIKKOR 45 mm 1:2,8 D E, both with 1:2 macro. Not 1:1 but still better than what Canon has. I have not found any numbers for the maximum tilt of the plane of focus at MFD, though.

I guess greater possible tilt for macro is one of the best reasons for a shorter flange distance in a mirrorless camera.

What if you paired an extension tube or 3 with one of the TSE lenses? Has anyone here tried that? I don't have any TSE lenses or I would try it.
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