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Messages - dr croubie

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1186
Lenses / Re: 3D EF lens
« on: September 13, 2011, 09:15:05 PM »
There's also a lot of people who don't actually care about TVs that much (or maybe i'm the exception? I can't be the only one who just has the TV as background noise/side glances while I use my computer).
My tv is 25 years old, has an RF-aerial input only (have to go through the VCR to play a DVD, and only bought the DVD player 4 years ago).
I still don't even have a digital tuner, and only 2 years before they turn off the analogue broadcasts (which they were meant to turn off end of 2009, but by then not even 25% of aussies could receive digital TV).
But then, my PC monitor is kick-ass (27" 2560x1440 Dell Ultrasharp), and I'd rather spend my money on better lenses...

As for the general population, I'm sure there are a fair few people who would like there to be more 3D TV broadcasts, but it's still a 'niche', and obviously not worth the advertising revenue vs transmission costs. Pay-TV still has some 3D content, but they never even state the fact whenever they advertise on free-to-air. Could be different in the States or Japan, but with the way their economies are going, i'd rather be eating a meal than watching a fancy TV.


Back to photos though, 3D photography has been around for a hundred years or more, I love this guy from 1955-73:


As for digital 3D stills, even the 'canon rep' in some other post said that 3D still were 'inevitable'. But i'm guessing more a 5-10 year timeframe than in 1-3 years.

Just a few musings on hurdles to overcome:

File formats. Are there even any standardised file formats for 3D pictures? (serious question, not rhetorical) Displaying 3D web content like you suggested is certainly plausible, i'd suggest even inevitable (eventually). But think about windows only just having added RAW support to their inbuilt viewers, how long until they add a 3D image-plugin after 3D cameras even materialise? we're just at the point where webpages can play video without flash plugins (newest versions of firefox at least), after 10 years or more of digital video being popular.

Monitors. Early adopters and gamers (and those suckered in by the WK2010 3D broadcasts) might be making inroads to 3d TVs, but that's a very small proportion of people. I know people still using CRT monitors for web-browsing. Tablet PCs and laptops are taking over from the desktop PC, maybe it's easier for them to make 3D screens on the latest gidget, I don't know. But for those who *have* to upgrade their phone every year or more, there has to be new features in the new model (to justify it being a 'new' model), and eventually that new feature will be a 3D screen for which you don't need glasses. And when that happens, the content will come, eventually.

Printing. I know not as many people print photos compared to looking at them on a screen, but i'd guess just as many print now as did back in the film days. Until someone figures out how to print a 3D photo to paper, there's a big roadblock. Of course, there are digital photo-frames (despite the horridly low-resolution of the ones i've seen), they can be made 3D as easily as a TV. But I predict them to die a slow death, with everyone becoming more and more power-conscious and turning TVs off at the plug to save a Watt or two worth of standby power, who'd have a screen projecting an image 24/7?

Cameras. There's your biggest sticking point, imho. Check out the Sputnik above. My main problems with making this digital are:
Two lenses or one?
One lens makes focussing more accurate, but then what? split the image down the middle (if it can even be done, i haven't thought enough about it), and the sensor has to be smaller to cover the image circle, or you need an MF-sized lens. Then the left side of the right image, and the right side of the left image are in the middle of the image circle = good IQ. The other edges, however are (almost by definition) fuzzier on all but the best lenses. Think about field curvature too, no way something like the 24-70 would cut it.

Two lenses, for a start you're limited to primes without some way to ultra-precisely match zoom lengths. Even with prime lenses, think about focussing. with anything faster than f/2.8 and/or longer than 35mm or so, DOF is going to be small. By definition the 2 lenses are looking at different angles, and they might be AFing on slightly different points. Leica may have more success adapting a rangefinder lens for 3D than a canikon AF lens.

One body or two? A two-lens single body will be huge. Huge. You have to make the body wide enough that any lens won't bump into the other. If you take two 400 f/2.8s side-by-side on one body, that body's going to be at least 30-50cm wide, not to mention the weight. Or limit the body to only certain lenses, and you're alienating a lot of people and uses. (I really do like the idea of 3D telezoom photos of wildlife, now that I think about it)

Two bodies? Well, if you can get two well-matched primes and bodies, MF them accurately (and/or stop down) enough, trigger them at precisely the same time, then you can make a nice 3D photo. But then, you can do that now, if you can afford to double your kit. No need to build a new body for that, you just need the file-format and processing software (which probably does exist already).

I'm not saying that a single-body consumer-affordable solution is not going to happen, i'm certain it will happen one day, but i think i'm more than safe saying i'll see a 100mp 1Ds mk7 first.
Or widen the search, with a radically new body, with a new lens-mount, with a dedicated non-changeable lens, with lower quality pics, it could happen as soon as a year or two, at least as a prototype/gimmick...

1187
Lenses / Re: 3D EF lens
« on: September 13, 2011, 05:49:36 PM »
I heard recently (i'll look for the news article later) that the TV stations in australia have cut back or almost entirely switched off their 3D TV broadcasts, from lack of interest...

edit: example: http://www.couriermail.com.au/news/tv-chiefs-quietly-mothball-3d-plans/story-e6freon6-1226111905469

1188
EOS Bodies / Re: New body spotted at IAAF Daegu?
« on: September 12, 2011, 04:54:45 AM »
Of course, if you're going to send prototypes out into the wild, wouldn't you put a new sensor and motherboard into an old-design case so noone recognises it?

I know i've done that in my electronics prototype work, old case + new boards + dremel does fine for testing until the new case is machined

1189
EOS Bodies / Re: APS-C Camera with an L Lens as a Kit
« on: September 11, 2011, 04:13:55 AM »
I'll presume you've done your research and just want a 7D + 24-105 for your use (although personally i got the 15-85).

at my favourite european shop:
24-105 €1049
7D body €1329
5D2 body €1895
7D + 15-85 €1949
7D + 24-105 €2278
5D2 + 24-105 €2595
5D2 + 24-70 €2955 (for comparison)


hmmm, wow. i'd get the 5D+24-105L as well for those prices. 7D kit is only a hundred euro less than the parts, the 5D2 kit is 450 less than the sum of its parts.
of course, that's assuming noone here convinces you to get the 15-85 or 17-55 instead...

1190
EOS Bodies / Re: Where are the BIG information leaks??
« on: August 28, 2011, 12:31:34 AM »
but where are they testing them, and how can they account for the public? almost anywhere you go these days with a big camera, you're going to turn heads, and if one of those heads is someone like me, i'll be looking a bit closer to see what equipment they're using.
So are they testing them out in nature? every time i go for a walk somewhere i think is secluded enough, inevitably i'll run into someone else with a camera, maybe a P&S, last time it was a nikon guy with a macro lens and ring flash up a hill 4km from the nearest road, 50km from the centre of the city.
or are they huddled in a studio, maybe taking portraits where noone else sees the camera but the models and makeup artists (who probably wouldn't know the difference between a hasselblad and an iphone)

even if the testers have signed NDAs, the public hasn't. probably the models even haven't. is it just that lucky that noone's spotted anyone using one?

1191
I do not understand :-/  The time to precision-grind glass?   Umm...

Don't forget the time to actually grow the fluorite crystals before grinding. The 1200 f/5.6 allegedly took nearly a year to grow the crystal for each lens. The fluorite lens in the 400 f/2.8IS mk1 doesn't look nearly as big, but i wouldn't be surprised if it took a few weeks to grow...

1192
EOS Bodies / Re: 1Ds Mark IV & 5D Mark II Merry-Go-Round
« on: August 26, 2011, 08:32:37 AM »
Seriously, 24-70 has to have IS or else myself, and thousands of others, will have no reason to buy it. Fix the field curvature also.

But what if they do one but not the other? IS with curvy corners? flat-field with no IS? How many of you would ditch your current 24-70 one for either of them?

And the "specialist" lenses, i'd like the idea of new TS-E(s), but does the 200-400 1.4x f/4 count as "specialist" enough?
How about an MP-E 65 mk2?

1193
Canon General / Re: Silly question by a noob
« on: August 26, 2011, 08:25:41 AM »
a) you have 21MP in a FF sensor, and put 9 (or so) of them together into one 'video pixel' across the whole sensor.
b) you just make a 2MP FF sensor.
All things being equal (like using the same technology, gapless microlenses etc), and using the same lens, you get exactly the same DOF, Noise, Sensitivity etc. (maybe a bit less power draw? if so maybe a bit less noise from self-heating?

If you eliminate the mirror, take out the shutter (ie remove stills capability) then it'll be cheaper too. But then you've just made a dslr-shaped video camera...

Smart thing for canon (or anyone) to do in bringing out a dedicated interchangeable-lens video camera is to make it either use their dslr-mount (like EF-mount), or make an adaptor so that you can mount dslr lenses on the new video camera.
And there's only one real interchangeable video lens-mount, Arri PL, and that's got a long enough flange distance that you can mount it on almost any new-mount video camera to come...

1194
Canon General / Re: Panasonic, I love you!!!!!
« on: August 26, 2011, 06:55:38 AM »
Did not the powershot G10 have 14MP, then the G11 and G12 down to 10MP, adding a different screen and video?
Did not the 14MP SX210 update to the SX220/230 with gps and double the screen dots, and reduce to 12MP?

1195
Canon General / Re: So... Sony just dropped their Juggernaut!
« on: August 24, 2011, 07:25:29 PM »
So it's APS-C, and $1400, so going to compete against the 7D basically.
24MP vs 18MP win.
12fps vs 8fps win (even beating the 1D4 there).
GPS vs none win (but lose if you don't care and can't switch it off to save battery life).
50/60fps 1080p video win. (but only 28MBPS, up from 24MBPS in 24/25fps? more compression = bad?)
19pt AF/11cross vs 19pt/19cross lose (just on numbers, we'll see how well it works later).
In camera-panorama win if you like it, don't care if you'd rather stitch in-PC
Sensor-based IS win for old lenses, lose for battery life and heat.
ISO 50-25,600 (I always remember a TDP quote, just because you can, doesn't mean you should).
Selectable ISO range in AutoISO win (my mum's 6-year old IST *DL can, 550D too, why can't my 7D?)
5-frame AE bracketing win.
1200-zone metering win? 7D is 63-zone in viewfinder, not sure about in live-view.
30-1/8000s, 1/250s flash same.
Flash GN 12 (i think 7D is GN15?)
Buffer 13 JPG shots big lose (maybe blame the SD card?)
Battery life 400 shots viewfinder lose (7D is 1000 shots i believe).
Electronic viewfinder lose for me, battery life and dark-tracking main reasons. Depends if it's worth the extra 12FPS to you.

Ergonomics are always personal, and you'll learn to use what you've got after a few months. Personally, i'm sticking with my 7D. But yay for Sony, hopefully it's lit a fire under their 7Dmk2 development team, I expect nothing less that 28MP 9FPS 25ptAF for $1500 now.

1196
Ditto. Why does it say 'Rebel T3i' next to my name?

Surely that should read 'EOS 600D'...?

1197
Canon General / Re: High shutter count on brand new 60D!
« on: August 21, 2011, 06:59:41 PM »
You might be able to check out the shutter count using this program:

http://astrojargon.net/EOSInfo.aspx (windows)
http://astrojargon.net/40DShutterCount.aspx (mac)

and on linux it's the easiest, with gphoto2 (which you need to download pics from camera anyway)
> gphoto2 --get-config shuttercounter
(maybe this has been ported to mac? could happen, it's all unix these days)
Not sure why canon don't put that kind of information retrieval in the EOS utility for Win though...

1198
Lenses / Re: Lens for a big sun in the pictures
« on: August 20, 2011, 09:40:26 AM »
I wouldn't say there's anything wrong with using a mirror lens for shooting into the sun, you'll be focussed at infinity and won't really have a chance to see the doughnut-shaped bokeh. They're also really light and easy to hold (but i'd be using a tripod anyway).

There's some other really long lenses on ebay i wouldn't touch with a bargepole for IQ, but if you don't care how sharp it is, i've seen things like a Rokinon/Bower/Opteka/Phoenix (ie, all rebadged Samyang) 650-1300mm f/8-16 for about $200-300. Manual focus only (but so are mirror lenses and using heaps of teleconverters), really really slow so useless for wildlife (but you want to stop down a lot for pointing into the sun anyway).

For a shot like you've got, a Graduated ND might be useful, you can darken the sun enough to get details in the buildings (if you didn't use one already, whatever you did for that first shot looks good).
And don't use live-view for focussing, i blame that for giving me dead pixels. (wear sunglasses for viewfinder focussing too maybe, so you don't ruin your eyes)

1199
Lenses / Re: Samyang 24 f/1.4 is coming
« on: August 17, 2011, 04:44:42 AM »
A low price tilt-shift lens would be very very tempting.

Pentacon Six Tilt adapters are $100 on ebay, zeiss lenses $1-200, soviets down to $30. But nothing (good) wider than 50mm though (except 30mm fisheye)...
(and only tilt or shift at once, unless you shell out a few hundred for a zoerk adapter)

So if optical quality of the Korean counterpart is just equal, that would be a "revolution" in the T&S little world!!  :P

i don't think anything's going to come close to the TS-E 24mm vII for resolution, even from canon themselves. But if Samyang can pull off the IQ-level of the 14/2.8 into a TS-E model for even half the price of the canon, i'd get one...

1200
Lenses / Re: Samyang 24 f/1.4 is coming
« on: August 16, 2011, 11:21:56 PM »
On photozone.de where they've reviewed the 8, 35, 85, all of them are pure old-fashioned turn-a-ring stop-down aperture, so i'm guessing the 24 1.4 would be too. But you gotta expect some shortcomings for the prices...

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