Gentlemen:
I know how maddening it can be to see someone pop in from nowhere and start pontificating, especially when he has a small number of posts. Thus, with this ONE under my belt, I should probably keep quiet; especially considering the post died almost 2,000 days ago. However, in one of his posts, back in 2010 (just stumbled on by me) thesheepdog said:
“The advantage-though minor-that a 50mm objective has is a WIDER FIELD OF VIEW …”
And, seeing no further entry on that subject, I thought I might like to pipe up. Please let me offer a snippet from an upcoming book on binoculars:
“It’s a common misconception that a binocular’s field of view is determined by the size of its objective lens.
Field of view, however, is a property of magnification, the size and position of the field stop (an orifice just in front of the field lens of the eyepiece), or perhaps the type of eyepiece used. The size of the objective lens has nothing to do with it. All other things being equal, field of view decreases as magnification increases. The objective should be thought of as a lens—not a window.
A good example could be found in comparing Nikon’s diminutive 6x15 with a Celestron 25x100. Although the Nikon has objectives the size of the tip of your finger, it has a field of view 4 times greater than a 25x100, with its 4-inch objectives!”
Optix1 (Chief Opticalman, USN-Ret.)
PS If someone has already addressed this, please just ignore the post. I’ll understand … I have kids.
I know how maddening it can be to see someone pop in from nowhere and start pontificating, especially when he has a small number of posts. Thus, with this ONE under my belt, I should probably keep quiet; especially considering the post died almost 2,000 days ago. However, in one of his posts, back in 2010 (just stumbled on by me) thesheepdog said:
“The advantage-though minor-that a 50mm objective has is a WIDER FIELD OF VIEW …”
And, seeing no further entry on that subject, I thought I might like to pipe up. Please let me offer a snippet from an upcoming book on binoculars:
“It’s a common misconception that a binocular’s field of view is determined by the size of its objective lens.
Field of view, however, is a property of magnification, the size and position of the field stop (an orifice just in front of the field lens of the eyepiece), or perhaps the type of eyepiece used. The size of the objective lens has nothing to do with it. All other things being equal, field of view decreases as magnification increases. The objective should be thought of as a lens—not a window.
A good example could be found in comparing Nikon’s diminutive 6x15 with a Celestron 25x100. Although the Nikon has objectives the size of the tip of your finger, it has a field of view 4 times greater than a 25x100, with its 4-inch objectives!”
Optix1 (Chief Opticalman, USN-Ret.)
PS If someone has already addressed this, please just ignore the post. I’ll understand … I have kids.