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What Does HD Mean?

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SDShannonS View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SDShannonS Quote  Post ReplyReply Direct Link To This Post Topic: What Does HD Mean?
    Posted: April/16/2011 at 20:51
I've seen some scopes designated as HD with no explanation of what that means.  I come from an IT background so to me it means "High Definition."  But rifles don't digitally process an image before resolving it, so HD on a scope makes about as much sense as "HD Sunglasses."

So, what am I missing?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Urimaginaryfrnd Quote  Post ReplyReply Direct Link To This Post Posted: April/16/2011 at 22:46
Well in some circles HD means Harley Davidson. Cool 
But to optics guys it means HIGH DEFINITION GLASS  glass that is much better quality and will provide a sharper clearer image.
 

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Post Options Post Options   Thanks (0) Thanks(0)   Quote topbrass Quote  Post ReplyReply Direct Link To This Post Posted: April/16/2011 at 22:58
ED?
 
SD?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Urimaginaryfrnd Quote  Post ReplyReply Direct Link To This Post Posted: April/16/2011 at 23:13
http://www.nikonusa.com/Learn-And-Explore/Nikon-Camera-Technology/ftlzi4z6/1/Super-ED-Glass.html
ED Nikon’s Extra-low Dispersion (ED) and Super ED glass help correct chromatic aberrations, or optical color defects, caused when different light wavelengths do not converge at the same point after passing through optical glass.

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SDShannonS View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SDShannonS Quote  Post ReplyReply Direct Link To This Post Posted: April/17/2011 at 00:24
Thanks for that.  Has anyone done a side-by-side comparison of the same scope using HD and non-HD glass?  What kind of a difference does it truly make?  Like night and day?  Or good but not great?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote stickbow46 Quote  Post ReplyReply Direct Link To This Post Posted: April/17/2011 at 23:05
Compared my SWFA SS10X vs.SS10X-HD,as far as the glass went the HD was much brighter,exposed more detail & was just plain easier on my eyes.Remember though it was also 2 1/2 times the price of the original 10X!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mike650 Quote  Post ReplyReply Direct Link To This Post Posted: April/17/2011 at 23:08
HD    High Definition
HD    Hard Drive
HD    Heavy Duty
HD    Harley-Davidson
HD    High Density
HD    Head
HD    Hold
HD    Honda
HD    Hard Disk
HD    Hundred
HD    Hyundai
HD    Help Desk
HD    Heidelberg
HD    Högsta Domstolen (Swedish supreme court of justice)
HD    Heart Disease
HD    Home Delivery
HD    Hilary Duff
HD    Home Decor
HD    Hot Dog
HD    Huntington's Disease
HD    Huddersfield (postcode, United Kingdom)
HD    Home Depot, Inc. (NYSE symbol)
HD    Hybrid Digital (radio technology)
HD    Hemodialysis
HD    Henry Draper (star catalog)
HD    Hairdresser
HD    Harmonic Distortion
HD    Half-Duplex
HD    Hodgkin's Disease
HD    Homeland Defense
HD    Helsingborgs Dagblad (Swedish newspaper)
HD    Half Day
HD    Historic District
HD    Hot Date (The Sims expansion pack)
HD    Hydrodynamic
HD    Highway Department
HD    Hip Dysplasia
HD    Hit Dice (role-playing games)
HD    Home Defense
HD    High Dive
HD    Hall Director
HD    Honorable Discharge
HD    Higher Diploma
HD    Hemorrhagic Disease
HD    Mustard Gas
HD    High Distinction (grade)
HD    Health Division
HD    Honorary Degree
HD    Housing Department
HD    Hand Dryer (building services)
HD    Hemodynamically (stable)
HD    High Dispersion
HD    Hyperactive Disorder
HD    Hoe Down (party)
HD    Horizontal Distance
HD    Helm's Deep (JRR Tolkien's The Two Towers)
HD    Humanitarian Demining (US Government unexploded ordnance mission areas)
HD    Heat Detector
HD    Hüsker Dü (band)
HD    Hydatid Disease
HD    Hot Desk
HD    Homeopathic Doctor
HD    Hazel Dell ( town in SW Washington)
HD    Hip-Disarticulation (amputation)
HD    Hidden Desire
HD    Highly Dispersed
HD    House Document (USACE)
HD    High-Drag
HD    Harmonization Document
HD    Hexanedione
HD    Harbor Defense
HD    Hurricane Days
HD    Heavy Drop
HD    Heavy Defense (gaming)
HD    Hrvatski Dragovoljac (Croatian: Volunteer; Zagreb football club)
HD    Hardware Disease (traumatic reticulopericarditis caused by foreign bodies in cattle)
HD    Helicopter Director
HD    Humidity Detector
HD    Hepatosis Dietetica
HD    Heloma Durum
HD    Heavy Decoy
HD    Horizontal Decelerator
HD    Half Sized Diazo Non-Reproducible Drawing
HD    Household Drivers
HD    Hydraulic Fluid, Diving
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Post Options Post Options   Thanks (0) Thanks(0)   Quote budperm Quote  Post ReplyReply Direct Link To This Post Posted: April/18/2011 at 06:03
Gee, thanks for clearing that up Mike!!! HippieSmile
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SDShannonS View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SDShannonS Quote  Post ReplyReply Direct Link To This Post Posted: April/18/2011 at 06:16
I always suspected that someone made a scope containing Hydraulic fluid, Diving.  Eureka!  At last, I've found it!
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