----- Original Message -----
From: "Lea Murphy" <lea@xxxxxxxxxxxxx>
To: "List for Photo/Imaging Educators - Professionals - Students"
<photoforum@xxxxxxxxxxxxxxxxxx>
Sent: Friday, December 12, 2014 3:08 AM
Subject: 150-600mm lens vs. telescope
i have a tutoring client doing some lovely wildlife photography work.
He's wanting a longer lens for some of his bird, deer, bear photography.
He's considering the Tamron 150-600 lens vs. using a telescope.
I recommended the lens for the auto focus capability.
What he wants to know, and what I can't seem to explain well, is the 'reach'
of the lens. How far out can he see with a 600mm lens vs. something like a
200mm?
Any ideas on how to explain this or suggestions on where to go to find a
chart that might show it in feet?
Thanks in advance for any light you can shine.
maybe you want to put it that it's about angle of view.. so say a 50 mm lens
will show around 50 degrees, a 100 about 15 degrees, a 500mm about 2 degrees
and a 1000mm about 1 degree on a 35mm lens. roughly..
Now ask them to imagine from their left to their right is 180 degrees (show
them a fisheye pic) then ask them to imagine 180th of that, one degree -
that's all that will be encompassed in a 1000mm shot.
It'll still be the same size image as the wide angle shotyou showed them,
just ateeny portion of it made bigger
k
