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Messages - privatebydesign

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301
EOS Bodies / Re: Bingo! New Canon 5Ds has 50.6 MP new rumored specs
« on: February 02, 2015, 10:49:52 AM »
5D I-III do the same, 1/200s is hit and miss, to be sure 1/160s is a better choice.

Are you people using original Canon flashes and not the cheapest ettl cables (if any)? I'm not promoting original Canon equipment, but a shutter shadow at max. x-sync should *definitely* not be to be expected as these values obviously are rather conservative in the first place esp. on 6d. I for one never, ever experienced this, and I'm using flash all the time (though often at hss for motion fill flash).
Somewhat conservative with Canon Flashes.  This example is from a camera with a 1/250th rating.  It made 1/320th but just barely missed 1/400th.


You guys need to get out more.....

http://strobist.blogspot.com/2010/01/know-your-sync.html

302
EOS Bodies / Re: Bingo! New Canon 5Ds has 50.6 MP new rumored specs
« on: February 02, 2015, 01:09:59 AM »
I'll toss a two stop ND on if need be but I'd prefer a higher sync speed regardless.  I usually shoot at 1/125.  I've had a few hit and miss at 1/180 on the 6D where my shot is catching the shutter at the bottom of the frame. Don't hVe that problem when I slow it down a half stop.  Anyone else have this issue?  Anyway, I'd rather a faster speed just to reduce the propensity for motion blur.  Most S___s come out tack sharp at 125 but occasionally I'll get some where the model moved etc... (Dancers posing I my case).  Getting a clean 250 with no shutter roll in frame would be awesome.  500 even better.  It's not always convenient to have your strobes be your shutter.  Hoping the new DX will surprise us with something crazy here.  I have two Buff Einsteins.  You can control those things up and down 9 stops from 2 watts to 640.  And I'd rather use the shutter speed and lights than having to resort to an ND filter anyway.

Outside I agree, in your own studio I don't.

I also have a couple of Einsteins, but when I do narrow dof product shots I often can't get them low enough without ND gelling them, particularly for snooted accents.

303
EOS Bodies / Re: FPS and Flash Sync Speed
« on: February 02, 2015, 01:01:41 AM »
A variable ND filter will fix that. Unfortunately it can also make it quite difficult to see through the viewfinder depending on the strength.

ND gels over the strobes could be easier and less costly. I also shoot 1/8000 sec at f1.4 with my 600RT EX speedlights.

Yes but you'd get much shorter exposure times if you didn't use HSS and controlled the ambient, thereby relying on very short flash duration as your effective shutter speed. Which is very doable and was the point of my first comment about this.

304
EOS Bodies / Re: POLL: How many mp do you want anyway?
« on: February 02, 2015, 12:57:44 AM »
The biggest printer I use (at my local Costco) is 12" by 18" at 300 ppi, for a native 19.4 MP.  So, theoretically my 5D3 is already overkill, and my SL1 is almost there.  But that assumes no cropping.  If I want to cut just 20% off of width and height, I'd need 30.4 MP to avoid interpolating.  More than that if I want to run and gun and shoot wide and recompose in post to move the central focus point to a rule-of-thirds node.

That said, I've printed pics from my old 10-MP XTi on that same printer and think they look pretty good despite the enlargement. 

What I'm more interested in than more resolution is better low-light quality.  A 50 MP camera only good to ISO 6400 doesn't really interest me.  A 30-ish MP camera at least as good as my 5D3 in low light, with some of the focus improvements (and the anti-flicker) of the 7D2 might tempt me.  Likewise, a FF camera the size and weight of my SL1 would be appealing.

No you wouldn't, with today's printers and their dithering and rasterizing algorithms 300dpi is complete overkill, besides, I don't believe there is a printer with a native 300dpi so all your data is dithered anyway.

Do a test, take a test image and then get it printed at 320dpi, down sample to 300dpi, do the same at 240dpi then see for yourself. Most people can't see a difference until around 200dpi.


305
EOS Bodies / Re: FPS and Flash Sync Speed
« on: February 01, 2015, 09:36:01 PM »
In what studio? The only need for faster sync speeds in a studio is to minimise the ambient, the studio is the one place where you have complete control of the ambient.

Such a slow sync speed makes it difficult to shoot with wide apertures which I sometimes would prefer using. Especially since I have such a small studio space which limits the amount of background blur I can do at higher F-stops.

That makes no sense, in your studio why can't you get the ambient below  1/200, 100iso and f1.2, or around EV8-9? I can understand not being able to turn your flashes down low enough in a small space at that aperture, but I can't understand not controlling your ambient.

306
EOS-M / Re: EOS M3 24 MP Sensor?
« on: February 01, 2015, 09:11:24 PM »
So are we all going with the assumption they're keeping the EF-M mount for the M3?

Er, surely by definition an M has an M mount?

I am pretty sure we will not see yet another Canon lens mount for many years. EF will always be the backbone, EF-s the Rebel sales stronghold, and the EF-M the mirrorless variant. Those wishing for a FF mirrorless need to look to other companies to service that very small niche.
They could use the  EF mount on a FF mirrorless :)

They could, but then you are making retrofocal lenses that don't need to be retrofocal. Using EF lenses with their 44mm flange distance on a FF mirrorless that could easily use an 18mm flange distance makes no sense, especially as a 'solution'.

Canon gave the clearest indication they could that they do not see ever making a ff mirrorless, certainly not in the foreseeable future, when they made the EF-M diameter so much smaller than the EF diameter.

307
EOS Bodies / Re: FPS and Flash Sync Speed
« on: February 01, 2015, 08:53:24 PM »
I wonder why they aren't able to increase the flash sync speed past 1/200.  Would the only reason for this be that the shutter / mirror assembly isn't fast enough?  If that is the case and the camera has a relatively slow mirror, maybe we shouldn't hope for faster fps in crop modes either.

1/200 is very disappointing for a studio body, where sync speeds are important.

In what studio? The only need for faster sync speeds in a studio is to minimise the ambient, the studio is the one place where you have complete control of the ambient.

308
EOS Bodies / Re: Bingo! New Canon 5Ds has 50.6 MP new rumored specs
« on: February 01, 2015, 08:15:22 PM »
Zone system with a digital sensor, tell me who does that work?

It works just as it did with film, though that isn't what neuro was talking about. He was referring to the fact that the metering system divides the scene into 252 separate areas that it analyzes, along with RGB data from 100,000 pixels, to try to intelligently work out optimal exposure.

309
EOS Bodies / Re: POLL: How many mp do you want anyway?
« on: February 01, 2015, 06:06:50 PM »
So, clearly no educated ppl here then.

70mm Film = ~2,200mp

The most important point is, The Distance between each light sensitive element.
I dont see any point in explaining the math or physics, everything you need to know is out there for you to discover.

Personally, I would be happy with 20mp, if there was no distance between Pixels.
\/ live long and prosper...

BullS___.

What film? What film speed? What are you using to estimate that figure? Are you scanning with a digital sensor? Resolved film grain is not detail, or are you extrapolating from some fantastical grain figure?

The 36MP Sony 135 format sensor delivers far more detail than all but technical films the same size, that puts a 70mm film in the 100-300MP area.

I have many 135 format Velvia 50 24"x36" Cibachrome prints, they don't have the detail I get from my 21MP sensor and the same lens when printed to the same size.


310
EOS-M / Re: EOS M3 24 MP Sensor?
« on: February 01, 2015, 05:25:29 PM »
So are we all going with the assumption they're keeping the EF-M mount for the M3?

Er, surely by definition an M has an M mount?

I am pretty sure we will not see yet another Canon lens mount for many years. EF will always be the backbone, EF-s the Rebel sales stronghold, and the EF-M the mirrorless variant. Those wishing for a FF mirrorless need to look to other companies to service that very small niche.

311
EOS Bodies / Re: Bingo! New Canon 5Ds has 50.6 MP new rumored specs
« on: February 01, 2015, 05:07:46 PM »
I'm also glad to see the "R" version that will allow me to decide when to add anti-aliasing, moire control and edge softening in post production if needed at all.

You cannot do, in post, what an AA filter does.  It's actually theoretically impossible.  All you can do in post is something that hides some of the aliasing that is captured.  You can't recover the original signal.

Why are you so afraid of a Canon camera without an anti-alias filter?

People are obviously using digital cameras without anti-alias filters quite successfully or else Phase One wouldn't be selling their medium format digital backs - the highest resolution digital cameras available to consumers.

And if the lack of an AA filter meant terrible looking photos, why did Nikon go from the D800 to D810 and drop the version of their camera *with* the AA filter, implying that people preferred that the camera didn't have it?


Why are you so afraid of a Canon camera without an anti-alias filter?

It's stupid, harmful, and can lead to Canon getting a bad reputation.


I have to agree with Dilbert on that one  :o

It isn't stupid, if it is harmful I am sure Canon have run the numbers and think it is worth it, and they can look after their own reputation, even when there are really serious issues. The 1D MkIII got them a terrible reputation for AF, the 1DX is widely regarded by those that push the AF envelope to be the best in the world.

Besides we don't know the nature of 'no AA filter' yet, obviously the D800E was a kludge and not widely loved, but the D810 isn't a kludge and does seem to be loved by its owners, maybe if the 5DRS is an even better implementation of 'no AA filter' that can retain some of the EF lens quality then it could approach MFD for all but the most discerning shooters.

To be sure, some shooters will be more than happy to make the trade off between the additional moire and the intrinsic sharpness 'no AA filter' will give them.

312
Canon General / Re: Photographer Petitions Canon for Left Handed Camera
« on: February 01, 2015, 01:37:49 PM »
What planet do you live on? What side of the road do they drive on in Japan?

Maybe a little bit late for an answer...
In Japan you drive on the left / UK side.


Yasukuni-dōri by davidcl0nel, on Flickr

David, it is a shame you didn't quote the entire post, if you had it would be obvious I knew that. My post was in reply to a stupid provocation where the poster asked if a right hand drive car could be expected! Clearly it can which is why I posted a picture of one and asked what side of the road do the Japanese drive on, after all it is the country that owns both the car and the camera companies.

It was really a comment on the naivety and parochial nature of canonuser0134's input.

313
Technical Support / Re: Do I need Low pass filter ?
« on: February 01, 2015, 10:48:02 AM »

Yes, Sir, My GAS. Illness is coming again. Yes, I need good doctor like you, to help me to select the best medicine to cure this GAS. Illness.

Surapon,

You are smart enough to know buying a new camera is not a cure, it might suppress the symptoms for a short time.

As for which camera to get, I'd strongly suggest waiting a little while, they will both be reviewed and compared and until we know how the R model sensor stack is actually formatted it is impossible to say how much of an issue moire might be.

As for the group portraits, nobody but you will see any difference between the new cameras and your current cameras unless you are printing very large and they are looking very close.

314
EOS Bodies / Re: Where is the EOS 5D Mark IV? [CR2]
« on: January 31, 2015, 10:54:31 PM »
And we all know that Canon doesn't design products that internally could be seen to compete.

Well explain the 5D MkII that killed the $7,000 1Ds MkIII for all but a very few purchasers, or the 70D that must have had a big impact on 7D sales.

315
EOS-M / Re: EOS M3 24 MP Sensor?
« on: January 31, 2015, 10:26:37 PM »
Image quality can be objectively measured. It's been demonstrated for years that those measurements do have a bearing on IQ. (I'm not talking about DXO scores here, either...I'm talking about measurements.) Not necessarily in every single image, but that's not what we're talking about here. We are talking about the potential to produce quality images...as it is an image producing device under discussion.


Objectively speaking, the device is either more or less limited in it's ability to produce quality, on a RELATIVE SCALE of cameras currently available. Canon's high read noise puts it at the lower end of that scale.


When it comes to what image quality is dependent upon. Let's list the criteria:


Sensor
Readout System
ISP (Image Signal Processor)
AF System
Metering System
Lenses


The user is a factor, but let's exclude that for the moment. Canon lenses? Awesome. Canon metering system? Excellent. Canon AF system? Excellent. Canon ISP (DIGIC 6)? Highly competitive (NX1 may trounce everything, though. ;P). Readout system? Hmm. Sensor? Hmm.


Canon excels at everything else that affects image quality except their readout system and sensor. Therefor, it stands to reason that the sensor and readout system would be the area Canon should put their focus, no?


So what's involved in an image sensor and readout system? Electronics and signals. What do electronics and signals have in common? Noise. What can be done to improve the quality of the signal coming off the sensor? Reduce noise. What does reducing noise do? Increases tttmnbso*. Oh. Oh. Ooohh!


There isn't anything else to it. Signals and noise. That's what an image is. In an image, a reduction in image noise increases SNR. In a device, a reduction in read noise increases tttmnbso (which is the potential for the camera to produce quality).


I'm trying to keep things objective here, not subjective. With objectivity, we have a level playing field. It doesn't assume one person's perceptions or opinions are better or worse than anyone else's....it simply relies on the cold, hard, emotionless little facts. It's a device we are talking about, something that has POTENTIAL to create images of quality. That potential can be higher or lower. Sony, Toshiba, Samsung? The potential of their sensors (just sensors, readout systems are included on-die & not all of them actually have cameras) to produce high quality is high to very high on a relative scale. Canon? To date, the potential of their sensors and readout system to produce high quality is lower, on a relative scale.


Emotions and perception doesn't play a role here (or at least, shouldn't play a role.)


Well, that's all for now, folks!





* TTTMNBSO: The thing that must not be spoken of

You are so fu--ing boring...........................

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