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optics
Optics is the branch of physics which involves the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. Optics usually describes the behaviour of visible, ultraviolet, and infrared light. Because light is an electromagnetic wave, other forms of electromagnetic radiation such as X-rays, microwaves, and radio waves exhibit similar properties.
Most optical phenomena can be accounted for using the classical electromagnetic description of light. Complete electromagnetic descriptions of light are, however, often difficult to apply in practice. Practical optics is usually done using simplified models. The most common of these, geometric optics, treats light as a collection of rays that travel in straight lines and bend when they pass through or reflect from surfaces. Physical optics is a more comprehensive model of light, which includes wave effects such as diffraction and interference that cannot be accounted for in geometric optics. Historically, the ray-based model of light was developed first, followed by the wave model of light. Progress in electromagnetic theory in the 19th century led to the discovery that light waves were in fact electromagnetic radiation.
Some phenomena depend on the fact that light has both wave-like and particle-like properties. Explanation of these effects requires quantum mechanics. When considering light's particle-like properties, the light is modelled as a collection of particles called "photons". Quantum optics deals with the application of quantum mechanics to optical systems.
Optical science is relevant to and studied in many related disciplines including astronomy, various engineering fields, photography, and medicine (particularly ophthalmology and optometry). Practical applications of optics are found in a variety of technologies and everyday objects, including mirrors, lenses, telescopes, microscopes, lasers, and fibre optics.
Like new, includes boxes. Looking to sell this setup as a complete package. I bought the G33 sans the STS mount so it has to go with the Unity Fast mount. Not currently interested in selling any parts of this setup piece meal. It will be sold or traded as a bundle. With that being said, I am...
Very good condition, works great. Has the case papers, I used it one time maybe 90 rounds had a wrap on it and put it away on a gun I never use, I might just have too many guns can't use them all. Glass is perfect. Just going a different direction with a new build. Was purchased through Primary...
Up for sale is my Del-ton AR-15. I have shot about 3 mags worth out of it and it's just time for a new hobby/owner
Includes 6 magazines
Romeo Red Dot (I still have the box)
Quad rail installed by Oregon Rifle Works (I have the original keymod rail as well)
Co-Witness Magpul pop-up sights
Blue...
Have a Vortex SPARC red dot with very little use and a Vortex VMX-3T 3X magnifier painted tan. Both are in excellent shape and work well.
$225 shipped for both.
Selling my Sig Sauer Juliet 3 Micro 3x Magnifier on an upgraded Juliet 3 Mount. This mount allows a faster, easier to actuate flip to side versus the original mount that is a push button. It's in good condition with a couple cosmetic scratches on the on the housing. Lenses are clear. Don't have...
Selling a Sig Sauer Romeo 4XT Pro in excellent condition. No scratches, only been mounted on my AR but haven’t zeroed it yet. Includes all the original extras and box.
Asking $450 OBO cash or partial trade specifically for an EOTECH EXPS3-0 or 3-2 in TAN plus CASH on my end.
Also selling the...
Up for sale I have several mounts for various red dots available. Heights, details and prices listed below. All payments will be via Zelle or PayPal F&F.
IM me with questions.
1) Bobro 1.7'' T2 mount - $50 shipped
2) ADM Aimpoint COMP mount (will fit Pro or Comp M4)- $50 shipped
3) ADM...
I have a set of ANVIS9 NV duels with green phosphorus illuminators from 2017. No flaws of any kind, rarely turned on and always stored with battery bank separated. Only used to display a handful of times, never mounted to anything.
I'm pretty open as far as trade goes.
Could use some more...
Like new Winchester spotting scope WT-631 15X45
Matte green
Tripod
Soft protective case for lens
Hard case for tripod and lens
Good condition has name written on it with felt pen as seen in pictures
Cash only, No trades. In person sales. No shipping. Text okay 503-310-7729
Working on a budget build and need some sights?! Look no further!
I have a set of ncStar flip up metal iron sights and a AT3 Tactical red dot with 11 brightness settings on a quick detach mount. These will fit a 1913 rail. Selling them as a set.
I’m willing to ship, buyer pays shipping.
Hi all,
Selling my 16" Remington AAC-SD and all the associated gear. I don't really need to sell all of this but alas I am out of space for my toys and it is the only 308 I have. This rifle has had around 200 rounds through it and is extremely accurate-my best 100 yard 5 shot group was .45"...
*Brand New - Never Used*
EOtech G43 Magnifier Black - Includes Switch to Side (STS) mount with 7mm spacer.
Quick, compact and lightweight - Provides 3x magnification for quick acquisition at longer ranges.
Full specs: https://www.eotechinc.com/eotech-magnifier-g43
NO TRADES PLEASE
So got this steiner scope in trade and its an amazing optic but way more scope than i will ever use.
Simply put I doubt i will ever shoot out past 150yds
Model is steiner P4Xi 4-16 x 56mm front focal plane and illuminated reticle that has 3 night vision compatible settings and 9 standard...