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Wildlife Any creature of the wild: in the air, sea, on safari or your backyard!.

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  #1  
Old July 17th, 2015, 09:48 PM
Winston Mitchell Winston Mitchell is offline
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Default From my office window...





Male American Goldfinch, Boise, Idaho


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  #2  
Old July 17th, 2015, 09:58 PM
Asher Kelman Asher Kelman is offline
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Quote:
Originally Posted by Winston Mitchell View Post




Male American Goldfinch, Boise, Idaho




Winston,

I am struck by your good fortune. how close was it?

It never seeks to amaze the when I see such a bright beautiful and highly noticeable bird - how on earth do they survive raptors with such obvious coats!

Asher
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  #3  
Old July 18th, 2015, 06:26 AM
Winston Mitchell Winston Mitchell is offline
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About 4 meters.
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  #4  
Old July 18th, 2015, 09:07 AM
Asher Kelman Asher Kelman is offline
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Quote:
Originally Posted by Winston Mitchell View Post
About 4 meters.
Wow! I'm wondering what gave that nice bokeh!

Is your office at home upstairs by a tree?

Asher
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  #5  
Old July 18th, 2015, 09:42 PM
Winston Mitchell Winston Mitchell is offline
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It is upstairs...many, many trees.
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  #6  
Old September 27th, 2015, 07:39 PM
Asher Kelman Asher Kelman is offline
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So Winston,

Any more action? Have the birds returned?


Asher
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  #7  
Old September 29th, 2015, 06:37 PM
Winston Mitchell Winston Mitchell is offline
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There are always birds around.
However, they do change with the seasons.
Some Summer here, some Winter here and some pass through in the Spring and Fall.
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  #8  
Old September 30th, 2015, 12:30 AM
Asher Kelman Asher Kelman is offline
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Quote:
Originally Posted by Winston Mitchell View Post
There are always birds around.
However, they do change with the seasons.
Some Summer here, some Winter here and some pass through in the Spring and Fall.
Well then, Winston, given those trees are so close to your window, I hope you keep that long lens ready!

Good luck!

Asher
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  #9  
Old October 1st, 2015, 04:44 AM
Winston Mitchell Winston Mitchell is offline
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I have two identical camera bodies.
The birding lens is always mounted on one of them.
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  #10  
Old February 23rd, 2017, 02:45 PM
Asher Kelman Asher Kelman is offline
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Quote:
Originally Posted by Winston Mitchell View Post




Male American Goldfinch, Boise, Idaho


I remembered this and thought it is nice to see again now that Dog Herr has shared his pictures using a 280 mm fixed focus lens from his home made blind here.

Asher
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  #11  
Old March 1st, 2017, 02:56 PM
Asher Kelman Asher Kelman is offline
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Quote:
Originally Posted by Winston Mitchell View Post
I have two identical camera bodies.
The birding lens is always mounted on one of them.
.....and what is your birding lens?

Asher
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  #12  
Old March 1st, 2017, 03:19 PM
Winston Mitchell Winston Mitchell is offline
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Sony Sal 70400g. It's good for grandkids too ;-)
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  #13  
Old March 1st, 2017, 03:50 PM
Asher Kelman Asher Kelman is offline
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Quote:
Originally Posted by Winston Mitchell View Post
Sony Sal 70400g. It's good for grandkids too ;-)
A great choice!

So, Winston, are you also fortunate to have the new and reportedly remarkable Sony A99 II full frame camera body too..... with the fabulous sensor from the A7RII?

I'm thinking about that as a possible new main camera.

Asher
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  #14  
Old March 1st, 2017, 04:23 PM
Winston Mitchell Winston Mitchell is offline
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I much prefer the reach of the 24 mpx APS-C sensors in my A77M2 bodies.
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  #15  
Old March 1st, 2017, 04:41 PM
Asher Kelman Asher Kelman is offline
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Quote:
Originally Posted by Winston Mitchell View Post
I much prefer the reach of the 24 mpx APS-C sensors in my A77M2 bodies.
Hmm! They would give about the same resolution! 44/ 1.6 is 27.5 hardly more than what you have with the A77M, so it makes sense!

With the larger sensor and the same lens, the extra pixels would be outside your chosen composition, anyway! To make use of those extra pixels, and have more resolution, (which I doubt you need), one would rent a 600 mm lens.

.....Your camera is lighter too!

Still that A99II is a prize of a new camera! Maybe better for full length portraits and landscapes where those pixels can do something useful!

Asher
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  #16  
Old March 2nd, 2017, 06:42 AM
Winston Mitchell Winston Mitchell is offline
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"Reach" is determined by sensor pixel pitch.
A99II is 4.4 microns.
A77II is 3.9 microns
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  #17  
Old March 12th, 2017, 10:13 AM
Asher Kelman Asher Kelman is offline
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Quote:
Originally Posted by Winston Mitchell View Post
"Reach" is determined by sensor pixel pitch.
A99II is 4.4 microns.
A77II is 3.9 microns
Interesting idea, Winston.

But what if I use a larger format camera with larger but far better "pixels" and a great area of sensor assigned to the bird?

So I could use a Fuji MF digital Mirrorlex GFX camera with 50 MP, much larger pixels and double the number of pixels assigned to the bird!

Asher
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  #18  
Old March 12th, 2017, 05:28 PM
Winston Mitchell Winston Mitchell is offline
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Three numbers determine how many pixels get on any given bird: subject distance, focal length and pixel density. That's it. Not very complicated.
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  #19  
Old March 13th, 2017, 01:36 PM
Doug Kerr Doug Kerr is offline
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Hi, Winston,

Quote:
Originally Posted by Winston Mitchell View Post
Three numbers determine how many pixels get on any given bird: subject distance, focal length and pixel density. That's it. Not very complicated.
Indeed.

And the derived property "reach" can be considered to be a measure of how many pixels get on a certain object area for an object at a certain distance, or to generalize it, how many pixels get on an object area subtending a unit solid angle.

That property is in turn a function of focal length and pixel density (for focus at any fairly large distance). Its unit is pixels per steradian.

Best regards,

Doug
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