What's new
New posts
New media
New media comments
New profile posts
New review items
Latest activity
Forums
New posts
Search forums
Gallery
New media
New comments
Search media
Reviews
New items
Latest content
Latest reviews
Latest questions
Brands
Search reviews
Opus
Birds & Bird Song
Locations
Resources
Contribute
Recent changes
Blogs
Members
Current visitors
New profile posts
Search profile posts
ZEISS
ZEISS Nature Observation
The Most Important Optical Parameters
Innovative Technologies
Conservation Projects
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
BirdForum is the net's largest birding community dedicated to wild birds and birding, and is
absolutely FREE
!
Register for an account
to take part in lively discussions in the forum, post your pictures in the gallery and more.
Forums
Binoculars & Spotting Scopes
Binoculars
Sharpness and resolution, one subject or two ?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="OPTIC_NUT" data-source="post: 3171142" data-attributes="member: 121951"><p>You can see a pebbly 'grain' when the light is very dark.</p><p>That's the 'shot noise' of your eye's receptors. Above that level,</p><p>all I can imagine is that the uncoated binoculars you looked through had</p><p>dust on the field lenses. Pebbly noise with medium brightness is almost</p><p>always dust and reflections of it.</p><p></p><p></p><p>The best way to check contrast is to look at "grey level",</p><p>how truly black a region next to brighter regions. </p><p>For consequences, you can have subtly different shades</p><p>and see if you can find the faint letters.</p><p>There are excellent camera test patterns that can be applied to binoculars.</p><p>A general 'haze' exists when contrast is poor.</p></blockquote><p></p>
[QUOTE="OPTIC_NUT, post: 3171142, member: 121951"] You can see a pebbly 'grain' when the light is very dark. That's the 'shot noise' of your eye's receptors. Above that level, all I can imagine is that the uncoated binoculars you looked through had dust on the field lenses. Pebbly noise with medium brightness is almost always dust and reflections of it. The best way to check contrast is to look at "grey level", how truly black a region next to brighter regions. For consequences, you can have subtly different shades and see if you can find the faint letters. There are excellent camera test patterns that can be applied to binoculars. A general 'haze' exists when contrast is poor. [/QUOTE]
Insert quotes...
Verification
Post reply
Forums
Binoculars & Spotting Scopes
Binoculars
Sharpness and resolution, one subject or two ?
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more...
Top
