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Messages - privatebydesign

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286
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.

287
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.

288
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.


289
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.

290
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.

291
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.

292
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.

293
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.

294
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...........................

295
Yes, I would.

296
EOS Bodies - For Stills / Re: Backup body for extreme environment
« on: January 31, 2015, 03:01:57 PM »
hi everyone, I'm going to be living and working in Antarctica soon and I'm looking for a good backup body to take with me. My main body is a 7D mark I which I love and has pretty much everything I need.
I would be looking to use the camera for a range of uses across various environments (at sea, Falklands, peninsula, mainland continent, icebergs, low-light, astro, birds etc.) and would ideally need to be weather sealed and cold weather tolerant (-55 Celsius).
I'm going to be down there for 18 months so although my main body will be used most, it is a long time and all gear breaks, there is obviously nowhere to get it fixed/replaced should I need to.

I was thinking about getting a FF backup and wasn't entirely ruling out a nice and cheap 5D mark I, it's obviously old now but still an excellent body. I had even considered all the way up to a 1Ds mk III, so a fairly flexible budget.

It doesn't need to be FF but already have a great APS-C body so something different wouldn't do any harm and weather sealing would be very much preferable when I'm up in the more northern wetter areas.

Any suggestions?

1Ds MkIII.

I use them and for adverse conditions it is far and away the best bang for the buck, and the IQ, especially at low iso, has not yet been bested to any degree by any Canon camera.

297
Sports / Re: Big Boat Fell Over!
« on: January 31, 2015, 02:59:30 PM »
Hi Private By Design.
Did you ever get your sail training ship to the Tall Ships gathering held in Southampton?
That sort of renaming seems a bit not in the spirit of things, maybe a bit crooked! Telling us about things like this, no wonder you remain private by design!  ;D

Cheers, Graham.

Haha, I used to be a ships Captain, it was a sail training ship. If  you want to see blatant and borderline legal name changing go to St. Eustatius in the Caribbean, it is, effectively, a sanctions busting 'oil storage facility'. Ships come in, unload their oil, rename, reload, and then deliver 'clean' unsanctioned oil. It really is quite comical.

No, I wasn't a tall ship, I was a pretty large schooner, 105' masts. It wasn't a classified training vessel, we all had to hold true commercial grade licenses (which training ships crews don't), but the crew turnover and type of job it was meant I did teach hundreds of crew and the owners felt it was, and treated it like, it was a training ship.

298
Sports / Re: Big Boat Fell Over!
« on: January 31, 2015, 02:55:00 PM »
Hi Domino Dude.
More to the point, it potentially saved 25 lives (including the pilot and captin and I always say you have to rely on the urge for self preservation of the guys in control), and prevented the port of Southampton being closed to large vessels for the duration of any salvage operation, which on a sunken vessel would probably still be in the planning or possibly the preparation stages, saving even more money and possibly jobs too.
None the less a smart and gutsy move as you say.
Not sure I would want a car that had been trapped in such a salt rich environment, bearing in mind there was salt water sloshing around on the inside rather than the outside like normal!

Cheers, Graham.

Thanks for the interesting post, Graham!
I heard about it on the radio when it happened, but hadn't looked at any photos. I certainly didn't imagine this. A smart and gutsy move that saved a lot of vehicles, and indirectly money.

This is the ballsiest intentional beaching I ever heard of http://www.uscg.mil/hq/cg5/cg545/docs/documents/monarch.pdf over 3,000 aboard, middle of the night and an intentional beaching. For those interested in this stuff read the bit about WTD #10 not being closed, I'll bet most passengers thought their Christmas was ruined, yet he saved 100's of lives.

299

.......

Now try 170.170.185, note there is a 15 point difference between the two values, lower that three stops and you get 139.139.151, you now have a 12 point difference between the two values. THE TONE HAS CHANGED as well as the luminance.


This could be solved if working in LAB color mode? I think so. Lowering three stops in "L" channel will leave "a" and "b" channel (which contain colors) the same.

That is an excellent idea, though there are issues associated with converting to Lab and back. So I tried it. It is much better, the difference only changed by a couple of points, but you have intrinsic issues of Lab.

But I have cracked it in RGB and I am going to do a problem image with it asap.

Do your curves-exposure etc adjustment, but use the Luminosity blending mode! Doing this maintains the 15 point spread on the above tone.

Maybe we can force extreme ETTR to work better, if so this could be a significant advance for some images.

300
EOS Bodies / Re: More About the EOS 5DS & EOS 5DS R
« on: January 31, 2015, 12:23:11 PM »
I gotcha.  Yeah the grips do get a bit bigger on the DX. 

I find the accessory grips to be bulkier and less comfortable to hold than the 1-series.  Balance is more important to me than weight, and the grip balances most L-series lenses better, meaning my hands don't get sore after a day of shooting. There's always flex between the body and an accessory grip, that can be an issue for tripod use (and swapping the grip off/on isn't very practical), so I far prefer the integrated design.  But it's definitely a personal preference.

That's a problem with the design, not a problem with integration versus separate.  The 1 series bodies should be designed like the 1V/1VHS.




Have you ever used a 1VHS? I have two here.

There is flex between the grip and body when using the tripod socket of the grip. Also the design is necessarily bigger and heavier than necessary for an all in one design, you have to have two bottom plates strong enough to take the tripod sockets and the grip needs a top plate.

It is a nice idea in theory, in practice, even the 1 series designs fall short in application as to make it 'better' would necessitate even more weight and space in materials.

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