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Re: [OM] IMG: Two Birds

Subject: Re: [OM] IMG: Two Birds
From: Jim Nichols <jhnichols@xxxxxxxxxxxxx>
Date: Mon, 19 Feb 2018 00:05:08 -0600
Hi Chris,

I believe that the focal length is still 500mm, but the field of view is equivalent to that of  a lens of 750mm.  The glass doesn't change, but it sees less because of the cropped sensor.

We have what I have always heard referred to as an English Sparrow, with fewer stripes and a black throat.  Then our common Sparrow is around, with fewer stripes and a lighter throat.

Jim Nichols
Tullahoma, TN USA

On 2/18/2018 11:43 PM, ChrisB wrote:
Presumably, Jim, that’s an effective focal length of around 750mm – with that 

That little bird looks quite similar to the House Sparrow over here.


On 18 Feb 18, at 22:33, Jim Nichols <jhnichols@xxxxxxxxxxxxx> wrote:

With the shoulder stock for support, I decided to see what I could do with a 
longer lens combination.  I added the Leica 2X Extender to the 250 Telyt-R, 
giving me a reach of 500mm.  I spotted a twin-jet on the usual route to 
Atlanta, and then saw a Song Sparrow sneaking through the grass and leaves, 
daring me to spot him.  I have one shot where he is looking me squarely in the 
eye, but liked this one better.

Atlanta bound:


Sneaky Song Sparrow:


Both are cropped, of course.

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