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Messages - traveller

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421
A few points:

1. According to DXO Mark, the D3s reaches its "acceptable" signal to noise value of 30dB at 3253 ISO (whilst keeping dynamic range at >9 EV and colour depth at 18bits), whereas the 5D MkII achieves this at 1815 ISO.  So 3253/1815 = ~1.79; i.e. the D3s is 79% better than the 5D MkII, which is basically just over 3/4 of a stop. 

2. Nikon is implying that the D4 manages to achieve the same high ISO performance as the D3s, but with a higher pixel count.  Thus, the 1D X would need to be between 3/4 and 1 stop better than the 5D MkII to match the D4. 

3. I've got a suspicion that the D3s 'cooks' its raw files at high ISO, based upon the SNR 18% graph from DXO Mark having a strange kink in it after ~ISO 9787 (also note the performance of the D3). 

Anyone want to check these calculations?

422
Lenses / Re: All primes... But what zoom?
« on: January 29, 2012, 10:14:28 AM »
Looking at it from the other point of view, what is it that you like about your primes? If it's shallow depth of field, then getting a 24-105mm f/4L doesn't make much sense! If you find yourself stopping the primes down to f/2.8-4 all the time, then the only reason to have primes instead of a standard zoom would be to force you to think about your framing and perspective; a zoom is the opposite if this too.  So I would ask yourself again, if you like primes so much, why do you want a zoom?

Might I suggest that if the 5D MkII and the three primes that you have are too heavy and bulky to carry in certain situations, then a 5D MkII and 24-105 f/4L IS won't really solve that problem.  If this is your thinking, then have you considered a mirrorless camera with the equivalent fast primes to your 'L' collection?

423
EOS Bodies / Re: *UPDATE* 5D Mark III - February 7, 2012 [CR2]
« on: January 29, 2012, 09:37:34 AM »
I read the 1DX specs as being 45 active and 16 assist points - which ties in nicely with what you are saying

Where did you read that on the 1D X spec list? Canon dropped the whole 'non-selectable AF assist points' from the 1D Mk4, probably because most everyone complained about it from the MkIII generation.  I can't see them reintroducing this unpopular move on the 1D X and I've seen nothing in their literature that suggests to me that they will. 

Maybe I've missed something?

424
Lenses / Re: *HELP* Alternatives to Canon EF-S 10-22mm
« on: January 29, 2012, 09:07:09 AM »
I'd only buy the Tokina 11-16 if you know that you'll need f/2.8; the Canon is both wider and longer and thus a more useful lens for landscape work.  Personally, I own the Sigma 10-20 f/4-5.6, it has very solid (but not L-class) construction and is almost the equal of the Canon resolution wise at f/8 and above.  Whilst it has better resolution, I couldn't recommend spending the extra on the Canon; if you're buying it the UK the 10-22 costs more than the 17-40 f/4L! That's just a rip-off in my book...

425
Lenses / Re: Looking for advice
« on: January 29, 2012, 06:14:06 AM »
The major disadvantage of the 17-55 in my opinion is that it is an EF-S lens. I did not consider buying it because I was always sure that I would upgrade to APS-H or FF one day which I have done meanwhile. The 17-55 does only work on APS-C...

The "in case he wants to go full frame in the future" is always a dilemma, but let's consider the fact that this is his first camera (and a very good one at that).  Unless he has a compelling reason for wanting full frame, I think that the 7D will be more than enough camera to keep him happy for a few years while he learns photography.  The 17-55 commands very good used prices so if he can afford it, I think that it is the best single lens buy for his needs and will complement the 70-200 well.   

426
EOS Bodies / Re: *UPDATE* 5D Mark III - February 7, 2012 [CR2]
« on: January 28, 2012, 05:21:46 PM »
Why would they announce a built-in GPS before they even begin shipping the new GPS accessory unit for the 1D X?

I would assume that "GPS ready" would mean that it would be compatible with the GPS accessory, not have it built in...

427
EOS Bodies / Re: 5D Mark III - February 7, 2012 [CR2]
« on: January 28, 2012, 02:24:08 PM »
With those specs, I wonder at the price.  Still, with those specs, it would be hard to justify spending the additional thousands of $ for the 1D X...

Will you stop saying that! Someone from Canon might hear you.  :)

428
Software & Accessories / Re: Canon Pixma Pro-1 Review Sneak Peek
« on: January 27, 2012, 07:24:51 PM »
It’s probably the largest and heaviest A3+ printer ever made.

And definitely the most expensive! You're getting into Epson 3880 territory with the price tag that the Pixma Pro-1 commands...

429
EOS Bodies / Re: Canon EOS-1D X Delayed?
« on: January 27, 2012, 07:17:45 PM »
Hmm... Sounds like a bit of trouble for Canon; they'd best be able to meet demand when it does go on sale with the Olympics being only a few months away. 

I don't think they'd be able to do anything in hardware to rectify the f/8 focusing issue, but they might try to rewrite the firmware to enable it.  Lets hope they don't b*gger it up it the process!

As to the comments that Canon omitted f/8 AF sensors to force people to purchase longer lenses, sorry I just don't buy this argument.  If you'e in the market for the 1D X then you'll buy whatever tools allow you to do the job: there isn't much beyond the 600 f/4L and 800 f/5.6L available, what about the people (like Arthur Morris) who already use these lenses on the 1D Mk4 with teleconverters?

430
EOS Bodies / Re: 7D Mk2 ..... APS-H
« on: January 27, 2012, 03:38:23 PM »
I think that the main reason they won't be putting an APS-H sensor in a non-1D line camera is that they don't want to risk 1DIV users trading down due to their loss of pixels on target in the 1D X.  If they put a 24MP APS-H sensor in a 7D-esque body and charged a 5D MkII price for it, there might be some who'd be tempted. 


Sorry but this makes NO sense, canon have already sold the 1d4s and made their money they dont give a damn what happens to used prices. in fact they would love for all the 1d4 users to trade down. more sales for them!

Sorry, I obviously wasn't clear enough as you seem to have missed my point: Canon want 1D MkIV owners to buy a 1D X and not be tempted to trade down to the 7D line.  In this happened, they would lose rather a lot of money...

431
EOS Bodies / Re: Poll - What is the Mystery Canon Body?
« on: January 27, 2012, 01:32:22 PM »
If the 3d comes to the market (praying that it does) I would think that Canon would create the 3d as a digital still camera (no video, high fps) and a new 5d (video, slow fps). 

What is this insistence on Canon creating a camera without video? I can understand stills photographers frustration at R&D effort into DSLR video that could be spent on other features (but don't forget the extra revenue that Canon makes from video users), but to not have a feature in one camera in the range that is in all the others seems a bit daft.  Video is not a feature that I use, but why would I object to something that is free? Does an extra switch/button that you don't use really bother you that much? You must seriously have a grudge against the almighty about the male nipple thing!  :)

432
EOS Bodies / Re: 5D Mark III Brief Specs? [CR1]
« on: January 27, 2012, 09:04:04 AM »
I've tried to do all the calculations based upon previous Digic generations, but I've found that it's very difficult to come up with precise figures for processing power.  Take the Digic 4 generation:

1D Mk4 = 16MP x 10fps = 160/2 = 80MP/s
7D = 18MP x 8fps = 144/2 = 72MP/s
60D = 18MP x 5fps = 90MP/s

So there's a range from 72 - 90MP/s that they Digic 4 seems to be capable of processing; so are the 1D X's Digic 5+s at the higher end or lower end of their capability range? There is also the complicating factor that the 1D X has a separate Digic 4 processor dedicated to AF and metering.  It could be entirely possible that a camera using dual Digic 5 for both image processing and AF & metering, might only be capable of 7.5fps.  Alternatively, this could be all that marketing would allow for a sub-1D series full frame camera.  Of course, it is far more likely that this rumour is total BS!

433
EOS Bodies / Re: Canon EOS 70D... not a new question...
« on: January 26, 2012, 07:09:58 PM »
I see.  And does the Fujifilm HS20 have a mirror that must be flipped up and down between each frame?  Consider - the 60D and 600D have the same sensor and Digic4 processor, yet the 600D has a significantly slower frame rate because the mirror/shutter mechanism is not as robust.

Yeah... as you know better than me the HS20 is a bridge camera but the others are DSLR.
-----
im also playing the waiting game. i want to upgrade my 40D but i am waiting to see if there will be a new 7D this year. im in no rush, but at the same time i am also in a rush because you get annoyed at bad noise. solid camera though. i agree with the others though. its worth the wait to see whats up with the camera.

yes, even if I wait till the 70D comes, then the price of 60D might drop. I only wish that it come before this summer!, though.

And thanks for your recommendations and answers.

If you want ultra high fps on a budget, then there are plenty of cameras like the FujiFilm HS20 out there.  Even better, they come with 24-600mm+ (equivalent) zoom lenses! Shame that what you'll get as a final result is a large quantity of mush from a long way off. 

434
EOS Bodies / Re: 5D Mark III Brief Specs? [CR1]
« on: January 26, 2012, 07:03:12 PM »
Can someone explain why Canon would provide any information to a waterproof housing manufacturer in advance of the release of a new camera, other than detailed engineering drawings and specifications for the external dimensions and button placements on that camera?

I was just thinking that myself... But I would be very impressed if their technicians could work out the sensor resolution and frame rate from this information!

435
EOS Bodies / Re: The Canon 5D line and AF...
« on: January 26, 2012, 02:16:03 PM »
I think that the argument that 5D users don't need and don't really want a top-of-the-line AF system because they mainly shoot static subject is a case of the tail wagging the dog.  5D users don't tend to shoot action with it because it's a pretty poor tool for this task when compared to most of the Canon prosumer range.  If you read a lot of members signatures who own the 5D MkII, they often also own the 7D; my guess is that they're using the latter for action photography.  The argument is often made that Canon makes more money pursuing this strategy because people buy two cameras.  This may be true, but the other way of looking at it would be to ask how many people who only own a 7D would have bought a 5D if it had a better AF system?

The other famous line is that we shouldn't expect a pro quality AF system in a non-pro camera; presumably this privilege is now reserved for Nikon shooters only! I find it interesting that the price charged for these 'non-pro' bodies now exceeds what a film era pro body used to cost.  I know that we're paying for a sensor and associated electronics, but the affordability point remains.  In the film era there were many 'serious amateurs' that could afford to buy the top of the line camera, but these days the vast majority of photographers that don't earn a living from their art, simply cannot afford or cannot justify the enormous price tags associated with the 1D X and D4 etc. 

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