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Optics gurus, why did USO change the ST-10?

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/12/2013 at 21:03
fnbrowning View Drop Down
Optics GrassHopper
Optics GrassHopper


Joined: February/21/2013
Location: Missouri
Status: Offline
Points: 18
I am curious about U.S. Optics design change from the ERGO to TPAL, from 44mm low profile objective to the 37mm.
 
(1) Parallax: From what I understand, the difference between the side focus and adjustable objective is one more lens inside the scope that you have to look through. So wouldn't you lose a little bit of light because of the TPAL?
 
(2) Objective: I'll admit that 7mm is not that much smaller, but doesn't every bit of light gathering help?
 
Given the two changes, does the current ST-10 buyer have a slightly dimmer image, or did USO perform some optics magic that the layperson is unaware of to maintain the image quality of the older 44mm/ERGO design?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/10/2013 at 19:43
beerfest19 View Drop Down
Optics GrassHopper
Optics GrassHopper


Joined: July/10/2013
Location: Los Angeles CA
Status: Offline
Points: 6
Talk to Jason or Jogn at USO. They will be able to answer all of your questions.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/10/2013 at 19:47
beerfest19 View Drop Down
Optics GrassHopper
Optics GrassHopper


Joined: July/10/2013
Location: Los Angeles CA
Status: Offline
Points: 6
sorry John
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