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Messages - Marsu42

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2431
EOS Bodies / Re: 70D vs D7100 ISO Comparison at 100%
« on: September 01, 2013, 04:03:22 PM »
Why is it the measured ISO are so different from the reported ISO? Shouldn't this be taken into account when we compare the noise of cameras at high iso?

Imho no, because the measured iso is just an intermediate layer nobody cares about - the more the companies cheat on the iso value, the more underexposed the shots will get and *that* is the thing to compare because it will raise the noise level.

2432
Lenses / Re: A Big Lens Announcement in September? [CR1]
« on: September 01, 2013, 03:59:05 PM »
Could be a sign, or it could be coincidence.

It also could be a sign that they're loosing sales vs. Nikon in the aps-c segment and want to lower their ef-s system price, the lenses are in production a long time so lowering the price mustn't mean a replacement is due.

but as to whether the people who have any say about product direction read it, your guess is as good as mine.

My guess: No way, the people really deciding about Canon's corp policy would be a handful of Japanese execs who will take advice from their tech, sales/marketing and maybe cps departments, but certainly ignore any Internet buzz.

Some marketing guys will watch these forums to prevent bad press about broken products, but the opinions here on anything are so diverse that a quick poll on cps will be better than reading CR to get the ear to the ground.

2433
EOS Bodies / Re: 70D vs D7100 ISO Comparison at 100%
« on: September 01, 2013, 03:45:42 PM »
BOB N has now presented the figures for 70D regarding read out noise, DR etc

Interesting - I can understand the large dr difference, but would anybody please care to explain to poor /me what read noise and saturation mean for real world shooting?

I tried to look at the explanations (from http://www.clarkvision.com/articles/digital.sensor.performance.summary/index.html) - but they are very technical and according to these numbers, both the 5d3 and 70d have to be complete junk @iso100 which doesn't seem to hinder even pros using them. So what's the real world difference?

2434
EOS Bodies / Re: 70D vs D7100 ISO Comparison at 100%
« on: September 01, 2013, 01:57:13 AM »
1) The differences aren't that important in actual, practical use.

I wouldn't say that, since iso noise is the main limiting factor on crop even a 1/2 stop gain might very well make a difference to some - it's not much, but it will show on each and every image you produce. And when you downsample the 24mp d7100 to 18mp and compare with the current Canon crop sensor, there will be more than nothing to see.

2) To measure those small differences you have to use an exacting methodology.

+1

2435
EOS Bodies - For Video / Re: Magic Lantern insecurities...
« on: August 31, 2013, 03:58:18 PM »
Part of me wonders if Canon marketing understands that it is a good thing

After a recent trip to the local electronics market/discounter shop and listening in to the conversations of people buying 7d-6d type gear I think what Canon marketing knows is: 90% of their customers don't care or have a clue, and those who do buy 1d type bodies with enough fw featues out of the box.

Plus the competition isn't any better, even Sony dslrs with an evf show a complete lack of imagination about what you can do with a dslr - so why should Canon bother and rock the boat?

The ml research shows that the Canon tech guys put a lot of features inside the digic processors, it's just that even their own firmware doesn't use it... more features mean more testing, bugs and support costs.

2436
EOS Bodies - For Video / Re: Magic Lantern insecurities...
« on: August 31, 2013, 03:23:09 PM »
Magic lantern drains my batteries when the camera is off

Ugh?! How's that? If anything it's gps that drains battery on t he 6d, otherwise it's a bug and you should post it on the ml forum...

No, it's easily reversible so I doubt it could do permanent damage.

Wrong - the alpha of ml on the 5d3 is not reversible right now, you cannot remove the boot flag yet (like on all other supported camera models). So if you want the option to remove ml w/o trace, don't use the 5d3 build yet...

... but as Canon never bothered anyone about the bootflag you should try ml anyway, it's beyond awesome :-)

one of the CR Commandments is I am your Canon, thou shall have no other firmware before Me,

Actually we should thank Canon for allowing ml to use their internal devlopment hook to boot the ml firmware on the card - Panasonic recently disabled any 3rd party fw: http://www.eoshd.com/content/518/why-panasonic-want-to-block-hacked-firmware

2437
Fyi: This Magic Lantern dual_iso module doesn't only work on 5d3 anymore, but in the latest build on:

* 500d, 550d, 600d, 700d
* 50d, 60d
* 7d
* 5d2, 5d3

I just tried it on my 60d and I'd suggest for everyone to give it a try, there are hardly any artifacts at all in the latest release and it will make you realize how much of a difference it makes if 2-3 stops of dr are conjured out of thin air - I'm more convinced than ever that at least to me dr on my 60d's sensor is a limiting factor.

2438
EOS Bodies / Re: 70D vs D7100 ISO Comparison at 100%
« on: August 31, 2013, 07:00:45 AM »
This is the only forum I have posted on, so I wouldn't call that "carpet bombing"as you say.

I really have to excuse for that assumption, just seemed very probable given the quick & dirty approach - so sorry, I'll check next time.

The results speak for themselves, if you disagree, show us your data. If you can't do that, well.... then you can't authoritatively say anything can you?

Imho if it is to be worth anything, it has to be done not handheld but with no shake (tripod or similar, contrast af, timer + mlu) - only then it could count as a quick comparisons of jpeg engines and awb metering.

2439
EOS Bodies / Re: 70D vs D7100 ISO Comparison at 100%
« on: August 30, 2013, 05:38:24 PM »
Quick and dirty test with description of what I did here

It's great you're doing reviews on your blog and are the first one to occupy the search engines by carpet-bombing forums, but "quick and dirty" won't do here, and you most likely know it - esp. in this case you gotta be joking :-\ ... "I shot a color chart, hand held, in fluorescent light, with AWB on both cameras, standard ISO noise reduction turned on."

One thing it might show is that Canon has some stronger edge contrast enhancement in place which might also explain the magical sharpness increase some people noticed in res charts.

2440
EOS Bodies / Re: Canon 70d RAW Samples
« on: August 30, 2013, 05:29:06 PM »
the 70D looks much more better in terms of image results compared to the 60D or 7D... i like its sharpness :)

I'd be very hesitant to draw a final conclusion from these b&w res charts w/o knowing the tradeoff, either more aliasing or noise.

Plus since nobody saw that sharpness increase in previous studio sample shots vs. the 18mp sensor, it's possible Canon came up with some way to "enhance" the edge contrast even in raw, maybe in combination with the dual af pixels, it's a consumer camera after all so some "tweaking" is allowed.

2441
EOS Bodies / Re: 12 Step Program for Focusing
« on: August 30, 2013, 04:20:15 PM »
And because everything is in focus on a 3" screen it really is difficult to constantly chimp to 10x just to see if the eyes are in focus.  That is my main focus point ... eyes.  I like the eyes focused and crisp

I'm shooting a lot of animals, but basically the same problem - the eyes aren't where the multi-point servo af prefers to focus, so you're stuck either with single point af or mf (difficult, but the better option for very thin dof like macro).

Apart from postprocessing tricks to make something appear to have more contrast, my only solutions are: a) use an even deeper depth of field, b) hold the camera/lens properly so at least that's stable, c) accept that not everything will be in focus unless Canon adds an automatic "focus on the eyes" mode in 2020.

Btw 1: For your 7d, install Magic Lantern, it has a feature that goes to 100% mode right away (and navigate to the focus point if you want) so you can see what's in focus quicker.

Btw 2: With a much more expensive camera set like the 5d3 with a new closed loop af lens like the 24-70ii you'd probably would get more in focus, but that's 3x the price of your system :-\

2442
EOS Bodies / Re: Why you shouldn't be worried about DR
« on: August 30, 2013, 03:00:55 PM »
And if you did have this amount of latitude in a single exposure you would produce a very flat, boring image with little visual punch.

Of course any high-dr image before applying a global tone curve,  global tonemapping or local adjustments (no matter if done by you or by "intelligent" software) looks extremely boring, that's why you're supposed to use postprocessing :-) ... if you want punchy out-of the box shots use a mobile phone as you immediately get satisfying blacks and blazing whites :->

I'm done, have fun. [...] it just isn't fun, informative, or helpful.

I'm sorry, you're one of the most competent and helpful members around here - but of course it's your free, spare time and it certainly *should* be fun, informative and helpful. I hope you reconsider as ignoring parts of a thread is possible, usually longer-running threads degrades into silliness anyway, ankorwatt or not.

2443
EOS Bodies / Re: Why you shouldn't be worried about DR
« on: August 30, 2013, 01:42:10 PM »
* the scene contains detail that is important to the meaning and effectiveness of the photo, that is beyond the DR capability of your sensor

To me, blown highlights (unless intended by the photog) always look bad, not matter if this part would contain "important detail" - but of course that's just perception.

I'd like to add that of course no sensor in the near or mid-term future will allow you to capture sunset with a dr of 18-20 stops, but unfortunately I'm often just missing a little bit, so I'm positive that even a little gain in dr would help a lot.

that a tripod and/or other suitable support is not out of the question!

That's mutually exclusive with your points containing "you  must capture the shot with one exposure" - my main problem with hdr outside are moving grass & leaves, and if these are in a high dr area of the shot even manual blending in postprocessing doesn't help.

I also agree that many might never encounter that problem, the real question is what tradeoff a higher dr would produce, i.e. as far as I understand it filling a higher dr range with low dr data produces worse gradients, this tradeoff could only be fixed by a 15/16bit resolution?

2444
EOS Bodies / Re: Play Arkanoid on your Canon dslr :-)
« on: August 30, 2013, 06:46:54 AM »
I was just late not too late as I had already agreed about Space Invaders on the specific ML forum 4 days ago...   ;D

Ah, excellent, it's very good I'm not the only one who regularly is on the ml & cr forum :-) ... otherwise I'd have thought the ml "enhance your firmware to improve your shots" community is completely separate from the cr "just buy new stuff to get better pictures" crowd :-p

2445
EOS Bodies / Re: 6d
« on: August 30, 2013, 05:44:01 AM »
Have to wait for buffer to clear after about 15 shots in rapid succession.

You're using the fastest sd card available like Sandisk Extreme Pro?

Very slow to focus with 100mm L macro (dunno if that's just me).

Slow in comparison to what - do you have another body to compare? The 100L's af is very slow, it's a macro lens after all.

Battery runs out overnight if you forget to turn GPS off.

Rejoice, Magic Lantern probably will add a feature to auto-turn gps off an on :-)

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