September 18, 2014, 02:05:29 PM

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Messages - Lee Jay

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16
EOS Bodies / Re: Official: Canon EOS 7D Mark II
« on: September 15, 2014, 01:26:19 PM »
If your not shooting action, or are reach limited then FF sensors are just better for the obvious reasons.

Better, but costlier.  But, yeah, if you don't need all this power, a 6D is probably better at just flat producing images.

17
EOS Bodies / Re: Official: Canon EOS 7D Mark II
« on: September 15, 2014, 12:44:48 PM »
That last bit about automatically switching the AF point...that sounds like the new tracking feature from Sony's AF system. If it does the same thing, then I'm impressed. You would then be able to manually choose a single AF point for getting the initial lock...but the sensor will still use all the AF points to track the subject. THAT is pretty kick-ass...

How is that not what the 5DIII can do now, albeit without tracking data input from the metering sensor?

From what I understand, that's a fairly key difference between the 5DIII and the 1DX.

18
EOS Bodies / Re: Official: Canon EOS 7D Mark II
« on: September 15, 2014, 12:36:00 PM »
I still don't expect it to fix Canon's noise issues...

As for base ISO DR, how about this.  It can do +/- 5 stops of bracketing for up to 7 exposures, and it can do 7 exposures in 6 tenths of a second.  That's a pretty fast HDR which would probably work for all but fast moving subjects, and it would give you up to around 22 stops of DR.

19
So, the same old same old 70D sensor?

No, it is not - stated clearly in multiple places.  New, more sensitive photo diodes, more transmissive Bayer dyes, and the possibility of better A-to-D and processing.  Scott Kelby said in his video that it produces the cleanest high ISO images he's ever seen from a crop sensor dSLR.  Now, given his past, that might be hyperbole, but since he's unquestionably used the 70D, that means this one should be better.

20
EOS Bodies / Re: Official: Canon EOS 7D Mark II
« on: September 15, 2014, 09:58:49 AM »
So, umm... what's special about this upgrade?

This is *exactly* the baby 1DX people have been asking for - fast, great focusing, but at a low price, in a small size, and with a high pixel density.  Call it a 1DX with built-in non-removable optically-perfect 1.6x teleconverter for 1/4 the price of a 1DX.

21


I'd like to know the actual resolution of a lens regardless of body.

Hearty Amen.

Why? Academia? Don't get me wrong, there is nothing wrong in and of itself that I can see, but seeing as how we pay thousands of dollars for these lenses that we can't use without bodies I question any results relevance.

Convolution.

Ask yourself this question.  Why, when DPReview tests a body, do they use a quality prime at an optimal aperture, mounted to a heavy studio tripod, with careful focus bracketing and remote release?

The answer is, so that the lens so dramatically out-resolves the body that the results you get are almost entirely limited by the body itself.

Why do you want that?  So that you can estimate how the body will perform with other lenses.

Same thing with lenses.  How does the lens perform by itself?  You want to know that so you can estimate how it will perform with any body.

If you don't do that, you're left testing every possible lens/body combination and retesting every lens every time a new body is released.

Convolution allows you to avoid that.

1/R^2 = 1/Rs^2 + 1/Rl^2, where R is system resolution, Rs is sensor resolution, and Rl is lens resolution.

If you know Rs and Rl independently, you can find R.

Precisely.

Precisely virtually zero practical value.

Just because you don't understand it doesn't mean it's of no value to people who do.

22
Tethered shooting is very nice and Canon had the opportunity to cut the cord with this, but no such luck, no WIFI -- wild ..I guess they still want to sell 800 WIFI add-ons which is completely bonkers to purchase.

If all you want is tethered shooting, just buy an EyeFi card.  That's what they're for.  No need for Canon's stupidly expensive WiFi module.

23
EOS Bodies / Re: More Images of the Canon EOS 7D Mark II
« on: September 13, 2014, 09:51:21 PM »
I upgraded from a 7d to a 1dx and there is absolutely no comparison - as you'd expect for the price.  If you can possibly afford it I say you only live once, so get the best.

Well, to me, the 1DX is the last Canon I would own, even if they were all the same price.  I just can't stand the 1-series bodies.  Too big, too heavy, can't remove the useless portrait grip.

Quote
But if you can't afford it the only other camera I would recommend is the 5dM111.  The IQ is almost as good as the 1dx, it just lacks the frame rate for sports IMO, and at half the price it's a bargin.

My application for a crop camera is fast action.  My application for a full-frame is low-light, generally very slow action.  That's why I'm thinking 7DII + 6D.  The 6D is actually somewhat better in low light than the 5DIII - about 1/2 stop better high ISO performance, and that center point can focus in two stops lower light.

If I had to have only one body, it would be the 5DIII, hands down.  But I actually have to have two, and given that, I'm thinking [70D or 7DII] for action + 6D for low-light and stationary subjects (like portraits).

24
EOS Bodies / Re: More Images of the Canon EOS 7D Mark II
« on: September 13, 2014, 09:45:24 PM »
I'm not sure technically why the SD card writability of the camera is slow...  someone else on here who is more tech savy can explain that.  All I know is that I don't like SD cards in my cameras with dual slots....  Buffer fills up way too fast.   I never use them.  I wish canon would just install dual CF slots.

Supposedly, this camera can support UHS-I, which can reach 90MB/second of write speed, theoretically.

25
EOS Bodies / Re: More Images of the Canon EOS 7D Mark II
« on: September 13, 2014, 08:12:57 PM »
Just small incremental upgrades.  Not much to show for all the years of development if you ask me.  I'll skip the mark II, thank you.

Since I skipped the 30D, 40D, 50D, 60D and 7D, this looks like a huge upgrade to me over the 20D I shot with (very successfully) all day today.

I'm shooting with a 60D and it looks like a huge upgrade :)

My biggest question is, should I get a 70D or a 7DII?  Some advantages for each.  I'll wait for the announcement and first tests on the sensor of the 7DII before I make a decision.

Interestingly, I was considering between 70D & 6D versus 7DII & 5DIII.  I like my 20D and 5D because they basically have the same user interface.  But, for what I use it for, the 6D would actually probably be better than the 5DIII (WiFi would help at times, GPS would certainly help to keep the clock accurate, the low-light focusing point is probably more useful for me than the 5DIII's advanced super-fast focusing).  So my wife basically told me to suck it up and get the 7DII and 6D, and just learn to handle the UI differences.  Still thinking about that, but she probably has a point.

26
EOS Bodies / Re: More Images of the Canon EOS 7D Mark II
« on: September 13, 2014, 08:01:59 PM »
Just small incremental upgrades.  Not much to show for all the years of development if you ask me.  I'll skip the mark II, thank you.

Since I skipped the 30D, 40D, 50D, 60D and 7D, this looks like a huge upgrade to me over the 20D I shot with (very successfully) all day today.

27
EOS Bodies / Re: More Images of the Canon EOS 7D Mark II
« on: September 13, 2014, 08:01:05 PM »
Both 6D and D610 unfortunately are too crippled as serious, longer-term useful, UNIVERSAL cameras - if moving subjects and challenging lighting conditions are also encountered shooting scenarios.

Baloney.  I've used my 5D classic in challenging lighting conditions with moving subjects, including R/C airplane and helicopter night-fly events.  It may not be as good as a Mark III or 1DX at that, but it still did the job, and I expect the 6D would have even better performance in such situations.

28
EOS Bodies / Re: Canon EOS 7D Mark II Specifications Confirmed
« on: September 11, 2014, 10:52:51 PM »
I'm asking this as a serious question, because I know nothing about shooting video, and I'm genuinely curious:

Why were/are so many people looking at the 7DmkII, a crop sensor camera, with such hope for a bounty of strong video features? As mentioned, I know nothing about video, but I would not think that a crop sensor camera would be the best option for that. What benefit would a crop sensor have for video?

Thanks for any clarification.

Realize that most cinema cameras like RED are smaller sensor cameras than full frame.  There's no reason a camera like the 7D couldn'thave decent video performance and newer video features.

29
EOS Bodies / Re: Canon EOS 7D Mark II Specifications Confirmed
« on: September 11, 2014, 08:54:47 PM »
DR is driven in part by pixel size,...

If that were true, the G15 wouldn't have more base ISO DR than the 1DX:

http://sensorgen.info/CanonPowershot_G15.html
http://sensorgen.info/CanonEOS-1D_X.html

30
EOS Bodies / Re: Canon EOS 7D Mark II Specifications Confirmed
« on: September 11, 2014, 08:52:51 PM »
I wonder if the 7D II will intrigue Chipworks enough to analyse it...they haven't really done much with Canon cameras since that one article, and nothing with Canon sensors since that article.

They have a detailed analysis of the 70D sensor.  It's just $16,000 to purchase it.

The only reason on-sensor ADC is good is so that you have lots and lots of them (and don't need lots and lots of PC board traces).  Discrete ADCs can be quite good.  I'm about to start using some commercial parts that are 24 bits at +/- 500mV with a rated DR of 110db, and that's with screw terminals to bring the voltages to it from entirely off the module.

And the only reason lots and lots of them is a good thing is so they can each run slowly.  I wonder if Canon could implement a high DR mode that would slow the 7DII down to 1fps for lower read noise, and a super high DR mode that would do that and do the Magic Lantern dual-ISO trick too.  All with the same sensor.

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