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Messages - bdunbar79

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16
EOS Bodies - For Stills / Re: Difference in image from APS-C to FF
« on: January 10, 2015, 04:58:51 PM »
I get that, I was more or less thinking in terms of absolute area of the lens diameter and not the focal length.  Because in theory in Bizzaro World I could create a 16mm lens with a gigantic diameter or a super long and narrow 600mm lens.  I didn't do the math on any of it so the 600 might very well always beat the 16mm...

...Ooo time for more Guiness Extra Stout...

17
EOS Bodies - For Stills / Re: Wait for 5D4 or go for 5D3/6D right now ?
« on: January 10, 2015, 04:57:00 PM »
Considering the interview and the translation, as well as the information provided on this site, clearly demonstrates that the 5D Mark IV will NOT be the high MP camera, I'd wager it's irrelevant.  You can also use common sense and understand that a camera's logical upgrade wouldn't be from a 22 MP sensor with the 1Dx's AF system (mostly) to a 53 MP sensor camera.

Very bizar comment. Careful with glue... Its not very healthy you know.

The original poster will - as I wrote - be better informed to make his choice later this Spring when Canon launches its new high pixel camera. In ample time before his trip to Europe in June.

Its totally irrelevant what's its going to be called or be like or cost. He will still be in a better position to make his decision at that time. So I suggest he waits. End of story.

What does the high MP release have to do with the 5D4?  I don't doubt he might be better off waiting to make a decision, but the high MP body release has nothing at all to do with the 5D4 and for some odd reason you keep linking the two.

18
EOS Bodies - For Stills / Re: Difference in image from APS-C to FF
« on: January 10, 2015, 04:52:37 PM »
YOU STOLE THE PICTURE I STOLE FROM JRISTA!!!   >:(

19
EOS Bodies - For Stills / Re: Difference in image from APS-C to FF
« on: January 10, 2015, 04:07:38 PM »
<You're very observant, because what you have seen is the difference in the volume of light that a longer lens passes and the lower volume that a short focal length passes.>


20
EOS Bodies / Re: EOS 5D Mark III Replacement Talk [CR2]
« on: January 10, 2015, 03:53:24 PM »
Oh hey!  Just with an adapter, Sony can take advantage of all of the advancements Canon has made in their lens lineup.  Screw Canon, Sony's better.

 ;D

21
EOS Bodies - For Stills / Re: Wait for 5D4 or go for 5D3/6D right now ?
« on: January 10, 2015, 02:44:26 PM »
Considering the interview and the translation, as well as the information provided on this site, clearly demonstrates that the 5D Mark IV will NOT be the high MP camera, I'd wager it's irrelevant.  You can also use common sense and understand that a camera's logical upgrade wouldn't be from a 22 MP sensor with the 1Dx's AF system (mostly) to a 53 MP sensor camera.

22
EOS Bodies / Re: EOS 5D Mark III Replacement Talk [CR2]
« on: January 10, 2015, 01:24:44 PM »
Quote
Not really.  Considering about 30-40% of my income comes from shooting sports, and the A7r SUCKS at shooting sports, I'm perfectly happy with my pair of 1Dx's.

I have to say this is not fair. The A7r and 1Dx are completely different classes. I have a a7s and would never think to take action shots with it as even my old 7D could focus faster. There are advantages to each body. The new a7ii with its 5-axis stabilization AND fast cont. AF is miles ahead of the 1Dx for video, for example.

Completely fair based upon what he said.  Did you read what he said?  Secondly, it's not a false statement; it does.

Last but not least, I don't care about video.  The A7ii will still not track as good as the 1Dx when used in sports, especially with Zone AF or all points active and using auto AF point switch.  Not even close.

23
EOS Bodies / Re: EOS 5D Mark III Replacement Talk [CR2]
« on: January 10, 2015, 11:28:51 AM »
Neuro,

There you go again.  Making statements based upon facts and statistics, rather than emotion.  Sheesh.

 ;D

24
EOS Bodies / Re: EOS 5D Mark III Replacement Talk [CR2]
« on: January 09, 2015, 11:26:54 PM »
This may be a bit off topic, but only at first glance. I really like to address loyal Canon defenders on this forum, and we all know who they are, usually they have over several thousands posts and are sometimes showing up on other forums just to out of blue state that canon is the only king on the planet.
Maybe they never ending campaign glorifying Canon generate some minuscule increase in sales, who knows? but in the long run I pray that Canon executives do not listen to them at all!
Please if you really love that Canon brand so much be clever enough to help Canon to understand that the emperor is sort of naked for some time now, please do not lull them to sleep with all that eloquent talk about superiority of the system over the quality of sensor, incredible selection of lenses (that can be and are successfully used on Sony cameras) etc, etc...
Canon is very strong corporation that will survive this small hick up, and sooner they realize the need to fix something the better we all will be including the 1Dx owners ;-)

I am 53 years old now, and waiting a decade for Canon to decide that it is a time to upgrade sensor is just unacceptable for me. That's why I am enjoying my beloved bit awkward A7r for some time now and pushing the envelopes the way I could never push with any of the current Canon cameras...
I hope this makes some sense to at least some of you :)

Lets hope that Canon once again is capable of philosophy that brought to life 5D Classic once upon a time...
Thank you.

Not really.  Considering about 30-40% of my income comes from shooting sports, and the A7r SUCKS at shooting sports, I'm perfectly happy with my pair of 1Dx's. 

25
EOS Bodies - For Stills / Re: POLL: Do you need 1/8000s shutter speed?
« on: January 06, 2015, 06:15:51 PM »
I've used it for daytime football when I wanted a really small DOF (f/2.8) with a 400mm lens.  I think I used mostly 1/5000s that day, but that was the reason.

26
EOS Bodies / Re: Wait for it ... Revolutionary or Evolutionary in 2015
« on: January 04, 2015, 09:35:14 PM »
I thought the 1Dx was revolutionary.  Then again between school and my job, I had been living in a cave.  :)

27
Lenses / Re: 400 f/2.8L II IS on sunny days and white jerseys
« on: January 02, 2015, 11:58:15 PM »
Well, to be honest with you guys, I'm not sure.  I haven't had any events where I've needed it yet  :-[

On the other hand I have a later development.  I noticed with the SAME camera my 70-200 f/2.8L II IS lens has been front-focusing in basketball.  Could be a problem with the camera and that is on its way to Canon.

I shot some night soccer with the 400 lens after I got it back and it worked fine; had no focus errors but that wasn't in bright sunny light where I had had trouble. 

Now though, it could have been the camera all along.  We'll see, the story continues.

By the way, I have a 2nd 1Dx where I keep the other lens but upon trying both cameras, the front-focusing problems have all been on the one particular camera.

28
EOS Bodies / Re: Canon Confirms Development of High Megapixel Camera
« on: January 02, 2015, 12:52:20 PM »
Just go to a forest where the sun is dappling in and you hit a scenario that needs more DR than Canon delivers but where Exmor DR is just enough.

Ahhh yes.  Forgot about dappling in sun forest photography.   :P

29
EOS Bodies / Re: Canon Confirms Development of High Megapixel Camera
« on: December 30, 2014, 12:37:36 PM »

Just as a benchmark, that site also claims that sensor size has no real meaningful effect on DOF.

They're correct, the only way sensor size directly affects DOF is due to the relationship between circle of confusion and sensor size.

So then there is some some effect.

We assume a constant viewing/output size.  Most DOF calculators assume that and have a set CoC value for each sensor size.  Magnification is therefore different and if I'm standing at 15 meters away from a subject and shoot with a 70D with a 100mm lens, at f/3.2, then I have a DOF value.  If I merely switch cameras to a 5D3, keep everything else the same, I get a different DOF.  The 5D3 requires less magnification to our output size and therefore has a deeper DOF than in the 70D in those conditions.  Even at equal subject size, the DOF is different.  It might not be the actual sensor doing this but it is certainly an effect and certainly affects DOF.

But that's not the point of this thread and I don't want to go here.

My point is how simplistic that site is.  Personally I'd trust Lee Jay's calculations over theirs', but that's just me.

30
EOS Bodies / Re: Canon Confirms Development of High Megapixel Camera
« on: December 30, 2014, 12:10:44 PM »
Quote
There is no problem of pixel size.

<physics>There is. </physics>

Yeah...let's talk about that.

I decided to calculate diffraction-limited resolution.  Here are the assumptions:  Green light (550nm), Bayer full-frame sensor, AA filter, MTF10 cutoff.  Here are the results:

f-stop Maximum MP count
1.4     8,333
2.0     4,167
2.8     2,083
4.0     1,042
5.7     521
8.0     260
11.3   130
16.0   65
22.6   33
32.0  16

So, does that seem like a problem to you for the foreseeable future?


your calculations seem off. For FF at f/4.0 a 115 Mp sensor would be diffraction limit.
see
http://www.luminous-landscape.com/tutorials/resolution.shtml

Just as a benchmark, that site also claims that sensor size has no real meaningful effect on DOF.

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