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Messages - neuroanatomist

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EOS Bodies - For Stills / Re: right now i am not happy to be a canon user
« on: December 20, 2012, 08:21:55 AM »
Ok, you're unhappy.  As I see it, you have four options:

  • Buy a Canon FF body and pay what Canon charges
  • Buy two Nikon FF bodies and a set of lenses (because a Nikon body can't be 'a backup' to a Canon body). How are the Nikon counterparts to your current lenses/flashes in terms of quality/price? Also, is the total cost of selling your Canon gear and switching to Nikon, in terms of money and time, really going to save you money?
  • Buy a Canon APS-C body, less expensive, works with all your lenses/flashes
  • Post about your unhappiness on an Internet forum and do nothing

So far, you've tried #4. How's it working out for you?  Does this thread take good pictures as a backup FF body?  At least, it's free, so now you're getting exactly what you're paying for...that should make you happy, right?  ;)

Point is, complaining here isn't going to do anything for you, except facilitate wallowing in your own unhappiness.  Make a choice, act on it.

Lenses / Re: Buy Canon 24-70l II today or wait for Newer version with IS?
« on: December 19, 2012, 09:33:27 PM »
No, return the lens, skip the 24-70/2.8 IS, too.  There'll be a 21-80mm f/2.8L IS a year after that...that's the one you want to wait for.

Seriously, making buying decisions based on rumors is a really bad idea.  A new 100-400L has been 'coming in about a year'....every year for the past 5 years.  If you need/want it now, get it now.

Lenses / Re: EF 24-70 f/2.8L IS Exists as a Working Prototype [CR2]
« on: December 19, 2012, 09:25:07 PM »
Great.. I waited on v1 because the rumors of v2.. now that I'm nearly ready to buy v2... the rumor of v2 w/IS ?

I'd prefer the IS version, but the rumor of one isn't going to stop me from buying the 24-70 II...

Canon General / Re: DxOMark vs. Reality
« on: December 19, 2012, 09:12:48 PM »
Isn't trying to use the argument:
-"They're wrong because Canon actually sell quite a lot of cameras"

Actually, the argument is, "They're irrelevant (or at least, not very relevant) because Canon sells quite a lot more cameras than their competitors who score much higher in DxOMark's rankings."

The DxO "scores" are in no way to be mistaken for "reality". They are what they are, an end sum of an arbitrarily weighed set of measurement points that in their constitution may (or may not!) in some way be representative of how you as an individual use your camera.

I could not agree more.  This was what I was driving at, initially.  At the time I originated this thread, there was a plethora of posts/threads proclaiming the superiority of the D800 (and other Nikon bodies) as cameras because of the DxOMark scores, and nearly as many posts/threads suggesting that Canon was doomed as a corporate entity because of their subpar sensors.  The former claim is clearly unsupported by DxOMark, and the latter claim is equally untrue.

Thanks, TheSuede, for your cogent post.   :)

Canon General / Re: DxOMark vs. Reality
« on: December 19, 2012, 08:21:29 PM »
If  we  shall discuss a specific topic (DXO measurements vs reality) let's us do that without involving other parameters.
it is very difficult to follow  when people are involving   other features in the cameras who has nothing to do with DXO measurements.

But REALITY does involve other parameters... Don't tell me you are taking pictures with just your sensor?  That is why this is titled DXO vs Reality.  Reality is what it is.  You need to consider everything and not only the sensor.  It's elementary my dear Watson...

Nope, DXO mark vs reality, you can read  at DXO what the marks includes  and which  sensor parameters  are measured.

Yep, reality is the whole point.  If DxOMark = Reality, and their Scores were all that mattered, no one would be buying Canon dSLRs, only Nikon dSLRs.  Has that been happening?  Or does Canon still have a greater market share?

CF tripods have three advantages over aluminum - less weight, less vibration (CF damps them better), and easier to use in cold temps (aluminum feels colder because it's a good thermal conductor, which is why my Calphalon cookware is made from it!).  But if you can handle the weight, the other two are relatively minor.  With a choice between a cheap tripod and none, get none. The Manfrotto aluminum models you're talking about aren't cheap tripods, the quality is good.  So, I'd say pick the one you prefer, and go for it!

Lenses / Re: lens calibration
« on: December 19, 2012, 06:16:42 PM »
just calibrated my 5dm3 with focal plus as I noticed that my shots are being far from sharp.

had EV of 6-7

100-400mm W+6 T+13
24-105mm W+5 T+15

That is quite hardcore isn't it? Btw does +1 stand for 1mm or cm?

First off, I'd add light and try again.  Your results may be ok, but IIRC FoCal recommends at least EV 8, and they used to recommend EV 10.

Each unit if AFMA represents 1/8 of the depth of focus for that lens at max aperture, so the absolute value actually depends on the lens. So, if you need +8 or -8, you're off by a full depth of focus.  Note that depth of focus is related to depth of field, but is measured at the sensor, so the units are actually down in the micrometer range of physical distance. 

Speedlites, Printers, Accessories / Re: Flash transceiver
« on: December 19, 2012, 05:51:45 PM »
Another option would be the relatively new Canon Speedlite 90EX - $150, functions as an on camera master, and gives you low-power (e.g., fill) flash capability if you need it.

Underwater / Re: Advice on inexpensive underwater system
« on: December 19, 2012, 05:48:19 PM »
Question about strobes - do I need them for snorkeling?  My assumption was they are only really necessary for diving - for snorkeling there is enough light from above the water.

That's probably going to depend on your snorkeling habits and abilities.  If you're trolling along the surface, with the end of your snorkel in the air, no need for a strobe.  When I'm snorkeling, I often free dive down to 25-30 feet, and at those depths, especially if the water is not crystal-clear, a strobe would certainly come in handy.

Underwater / Re: Advice on inexpensive underwater system
« on: December 19, 2012, 03:36:17 PM »
For shallow uses like you're discussing, I'd look at a G1 X and the Canon housing - that will be less than $1K.  A decent second offering would the Sony RX-100 and the Ikelite housing for it.  For deeper work, I'd get the Ilekite housing, and you'd need underwater strobe(s) as well.  That combo will set you back a little over $1K.    The idea in both cases is to get the biggest sensor you can.

Personally, I'd likely choose the RX-100 since I'm not a fan of the G-series form factor (too big for general use).  I love my Canon S100...but if it breaks, I'll buy an RX-100 to replace it.

So... even if I was shooting that f/2.8 lens at a narrower aperture (f/4 or f/16) the "precision AF" would still work to improve shots on that lens?  Or does the precision AF only kick in when you actually dial in an aperture f/2.8 or wider?

The aperture you select for a shot is irrelevant.  Phase detect AF (i.e. viewfinder AF) is always performed with the lens at max aperture, then the lens is stopped down to your selected aperture right when the shot is taken.

Canon General / Re: DxOMark vs. Reality
« on: December 19, 2012, 12:58:09 PM »
And frankly, I don't think that non-obsesed consumers care about making truly personally informed decisions.

Not sure I agree with that...I think most consumers make personally informed decisions - it's just that since it's personally informed, and what constitutes adequate information for that is different for different people.  But that idea is consistent with what I'm saying - DOMark data are not a factor in the buying decisions of most consumers when it omes to a dSLR purchase.

Speedlites, Printers, Accessories / Re: Flash transceiver
« on: December 19, 2012, 12:04:21 PM »
No.  On the 7D, the popup flash is the transmitter - the 5DIII does not have one.

Software & Accessories / Re: Stop Using Instagram
« on: December 19, 2012, 11:49:01 AM »
Even after all of the outrage, so far as I know Instagram have not presented a new, fixed, TOS. So why they released a press release to "talk" to people, they appear to have not fixed the actual problem.

Wait, mean a blog post isn't legally binding?   :o

When you use an f/2.8 lens on a camera that has a high-precision f/2.8-sensitive AF point, you get the benefit of that high-precision AF point that you don't get with a lens slower than f/2.8 ).  This is specified by Canon as 'accurate to within one depth of focus' for normal precision and 'accurate to within 1/3 the depth of focus' for high precision.  AF systems aren't perfect - any given shot will be within some range of 'perfect' - using a lens that enables the high-precision point generally means that more shots, on average, will be closer to 'perfect'.

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