December 22, 2014, 05:53:18 PM

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Messages - neuroanatomist

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1
EOS Bodies / Re: More 7DII focus problems
« on: Today at 01:11:06 PM »
Think like a rocket scientist -- the rocket will not be very beneficial to a mission aimed at an enemy plane if it suddenly swerves because a bird crosses it's path, and shoots down a pelican.

Or, say I'm trying to shoot that pelican flying by, and a surface to air missile passes through the scene – if I've configured the tracking sensitivity and speed options appropriately, the camera will ignore the missile and remain locked on the pelican so I can continue taking pictures.  Of course, with SAMs flying around, ducking for cover or running away might be better choices than taking pictures.  ;)

2
Technical Support / Re: What a day: dropped my camera.
« on: Today at 11:38:24 AM »
Sorry to hear that.  :'(

I'm sure people can give you guesses as to cost, only Canon can give you answers

I dropped my 5DII from waist height onto pavement twice in one day.  No damage other than a faint scuff mark on one corner (barely noticeable).  But...all my AFMA values shifted 10 units negative.  That might be something you want to check out.

Good luck!

3
EOS Bodies / Re: More 7DII focus problems
« on: Today at 10:53:44 AM »
Many '7DII Focus Problems' would be better termed '7DII user problems', and that's pretty much true with any new camera released.  Mostly, they come down to inadequate experience with the camera, not having RTFM, or expecting it to behave just like the last camera used.

Others have pointed out specific issues above.  IMO, the biggest issue is Automatic AF point selection.  The subject of the image should not be chosen by the camera, but by the person holding it.  IMO, there's only one situation in which auto point selection is warranted – tracking a moving subject in AI Servo.  In that case, the user selects the starting AF point, and the camera then tracks the subject using all points.

4
EOS Bodies / Re: Ron Martinsen Blasts the 7DII in his review
« on: Today at 08:17:46 AM »
@Tuglea - I want a cup of coffee and the 7DII won't brew one for me.  Therefore, it fails to meet MY needs and it's a crappy camera.  So I guess we agree.

 ::) ::) ::)

I didn't say the 7D2 was a bad camera, I said that it was a disappointing camera because it is 2012 technology, but was released in 2014 when the world has moved on. If they had built it from current tech instead of old tech it would have been so much more than it actually is now.

...

It boggles the mind!

You could have said you are disappointed in the 7DII, and that would brook no argument.  But to categorize it as 'disappointing old tech' is such an asinine comment it boggles the mind (or would, if it came from someone who hasn't made such comments frequently).

65 cross-type AF points with a very wide spread across the frame, 10 fps with dedicated PDAF between each frame for excellent tracking (better than MILCs), those are 'old tech'?  Oh, I remember – you're one of those that would prefer to take pictures with a bare silicon sensor, because sensor = camera.   

5
IIRC, you can change it in iPhoto (or Photos) > Preferences > General tab, there's a popup of what to do when a camera is connected that applies to memory cards, too.

6
Technical Support / Re: Repair cost cf card bent pin
« on: December 21, 2014, 05:30:26 PM »
Correct me if I'm wrong, but the "Extreme Pro 32GB 90MB/s" card with which you've got a 45MB/s write speed is this one?

If so, it has a guaranteed minimum writing speed of 20MB/s, which would your point about a card guaranteed minimum writing speed of "only" 30MB/s being too slow moot.

Yes , I missed (misinterpreted, actually) the 'minimum' part.  Still, the if Canon supports higher CF speeds than SD speeds, the card specs are irrelevant as long as the card isn't the bottleneck (which it's not with current cards).

7
Thanks for testing and posting your results, Don.   Your experience with DotTune being inconsistent and unreliable matches my own.

8
Technical Support / Re: Repair cost cf card bent pin
« on: December 21, 2014, 04:01:25 PM »
1) I can see the advantage on the 7D and 1D-X. For the 5DmkIV (assuming it's MP count doesn't skyrocket), I'll be happy to settle for 30MB/s when the buffer runs out.

Even my old 5DII wrote at ~40 MB/s.

1. Just to clear that one aside: yes, I can be happy with an additional delay.

2. And now to the point: did the 5DmkII you used at the time had CF cards with a guaranteed minimum writing speed of ~40MB/s (if so, please state date and card model), or not?

I tested multiple cards, all of them SanDisk models.  They were pre-UDMA7 cards, but nevertheless the Canon firmware updated to increase UDMA7 speeds also applied to high capacity UDMA6 cards. 



I think I'll repeat the test with my 1D X at some point.

9
EOS Bodies / Re: Ron Martinsen Blasts the 7DII in his review
« on: December 21, 2014, 02:58:43 PM »
I happen to be friends with Ron and have worked with him for some time.  While I do not always agree with his reviews, he's pretty straight up.  One thing is he has always stated what he thought about products - even when it wound up pissing off his sponsors.  Keep in mind that the majority of big review sites out there have to temper their disappointments in order to not suffer financially.

In terms of his review on the 7D2, I happen to agree with it. \

so you recommend that someone who is not using the 7D MK II for wildlife or sports buy a D4s?  A D4s won't do sports or wildlife?  What is he on??

From his review I gather that he is recommending the 1D4 over the 7D2.  As a primary camera this makes sense.  Personally this is one area where I do not agree.  I find a 5D3 + 7D2 to be a better combination.

In terms of the D4s I know he loves this camera because he found the AF to be superior to the 1Dx in his review.  That being said he is a Canon shooter.  This is one area where I do not entirely agree with him.  Personally for wildlife I cannot justify the price difference of the 1Dx over the 5D3.

Personally I can. Absolutely.

So could I...but I don't need to justify it to anyone.   :)

10
Technical Support / Re: Repair cost cf card bent pin
« on: December 21, 2014, 02:03:44 PM »
1) I can see the advantage on the 7D and 1D-X. For the 5DmkIV (assuming it's MP count doesn't skyrocket), I'll be happy to settle for 30MB/s when the buffer runs out.

Even my old 5DII wrote at ~40 MB/s.  After a 20 s burst, the buffer took ~26 s to clear before a shot could be taken.  A lot can happen in 26 s, even more could happen in the 35 s it would take to clear at 30 MB/s.  But if you're happy with the additional delay, that's ok for you.  I wouldn't be. 

11
Technical Support / Re: Repair cost cf card bent pin
« on: December 21, 2014, 12:04:03 PM »
With memory cards supporting UHS Speed Class 3 (= minimum 30MB/s) selling for under U.S.$100, and the smaller form factor, I don't see any reason to keep supporting CF any more.

Considering that my old 7D hit write speeds of >45 MB/s, I don't see a card which would take 50% longer to clear the buffer as a viable option.  Also, highest SD card speeds are only achieved after a low-level format, so if you don't perform that time-consuming in-camera task frequently, your speeds get even slower. 

12
EOS Bodies - For Stills / Re: 5DIII AF Point Issue
« on: December 20, 2014, 07:25:02 PM »
I just did a test and mine appears off a bit as well.  However, I did a test where I focused on the extreme top-left corner of a square and fired 3 times.  Each time it locked focus properly on the corner of the square and NOT on the wall behind it.   When I looked at the playback, the highlighted area was on the wall, not on the square.   So I think this may be a playback issue, NOT a focus issue.

It's a misalignment issue.  But...misalignment of what?  Ideally, the transmissive LCD, the AF sensor, and the image sensor should all be aligned.  If the transmissive LCD and AF sensor are in sync but the image sensor isn't, focus point placement for the shot will be correct but the AF point playback display will be off.  If the AF sensor and image sensor are in sync but the transmissive LCD isn't, both focus point placement for the shot and the playback display will be off. 

I expect careful testing could determine which was off.  It's worth noting that the actual area of the AF point on the AF sensor is larger than the little box in the viewfinder.  Spot AF uses a smaller area of the AF point, but even that is slightly larger than the box in the VF (the main box, not the smaller inset box that indicates Spot AF).

13
EOS Bodies / Re: Ron Martinsen Blasts the 7DII in his review
« on: December 20, 2014, 07:10:57 PM »
http://www.naturescapes.net/articles/techniques/the-economics-of-digital-photo-sensors/

i read the article. it is outdated (2006). i don't know if the same percentages apply now? the article concluded that you got 5 ff sensors vs 13 crop sensors from a "silicon wafer". that translated to a cost of $385 vs $38. this conclusion was based on knowledge of semiconductor production and conjecture. not known costs. i don't suppose there is any published information about what the actual manufacturing costs of various sensors are?

Yes, it's outdated.  But even though Canon is now using 300mm wafers, two things haven't changed since then.  One, the number of rectangles of a given size that can fit within a circle of a given size (actually, that hasn't changed since Euclid described the basic principles of geometry), and two, given a fixed defect rate and random distribution over the wafer, larger sensors will fail QC with a higher frequency than smaller ones.  Since the cost to image a wafer isn't affected by the size of the pieces into which it will be cut, those two facts above mean a FF sensor will cost >10x the cost of an APS-C sensor.   Then factor in the cost of everything else that has to be bigger because of the bigger sensor. 


Try looking over the financial reports for Canon, Sony, Nikon, Panasonic, Samsung.  Then tell them how they can cut the price of products by 50% and still make the 5% profit they now make.

How dare you let facts and reality stand in the way of 'but I don't wanna pay that much *whine–pout–stamp-my-foot*'.   ;)

14
EOS Bodies / Re: Ron Martinsen Blasts the 7DII in his review
« on: December 20, 2014, 03:50:54 PM »
i am not a socialist and i believe in free enterprise but i don't agree with price gouging. i think the price of ff cameras has been artificially inflated for a long time. they are free to charge whatever they want as long as they are not involved in collusion and price fixing. afaik that would be illegal in the u.s.

If you have evidence that such activities are occurring, you should report it to the Federal Trade Commission (www.ftc.gov).  But I'm guessing you just think they cost too much.  That's certainly your prerogative (of course, writing that they are engaged in price fixing is libel), just as it's Canon's to set prices to maximize their profit. 

15
EOS Bodies - For Stills / Re: 5DIII AF Point Issue
« on: December 20, 2014, 03:34:26 PM »
@ Viggo – that sucks.  :'(  Add it to your list of things to check when you get your 1D X MkII.   ;)

@ infared – sorry, no idea.  Taking it in may have another benefit, I recall from another thread the poster had difficulty getting Canon Service to understand the problem (IIRC, they shipped it back as 'no problem found'), so explaining it in person may help.

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