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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.
I just picked up a 930 Tactical, basically an SPX without sights.... well okay it has a bead.
Looking for something a little more..... Didn't want to spend the extra $250+ to get the SPX.
Anyone have experience with putting red dot on a 12ga?
What do you use and how did it work out?
Got this in on a trade, shot 7 shots with it on my ruger american and decided i want more magnification. In perfect shape and will include a set of vortex hunter high 30mm rings. $120 or trade for a sig romeo 5, holosun or primary arms micro red dot, streamlight rail mount hlx, Inforce wml/x...
SOLD
Redfield Tactical Style SPR 30mm Optics Mount $20 Face to face in NE Portland $25 Shipped
worked great to hold zero on a 308
some scrapes on knobs, see close up on last pic
-Optimal height and forward cantilever for AR platform rifles
-Black like ninja
-Sleek design for low-profile...
I moved into a different gun for my USPSA carry optics competition...and then I adopted two kiddos. I just don't need a backup rig. Included here is a G17 and everything you need for USPSA competition in carry optics, the fastest-growing division right now.
$850 for everything below:
Gun...
Note: I added a target photo below. The target on the right is from this rifle and was shot at 100 yards with 7x scope. I used 4 different types of budget 55gr fmj ammo, the middle group in each target was a 2nd group of Remington 55gr fmj. The BCA barrel has problems, I know. I haven't given up...
Hey guys, been loving my new 10/22, but I am ready for some optics. I've been shopping around for scopes and I think I've settled on the
Vortex Optics - Crossfire II 2-7x32 Dead-Hold BDC
But now I need a suitable rail and rings. I've heard about not mixing metals and been reading about...
They're easily $100.00 below local pricing..
Even with shipping and transfer fees I'm still 50 to 70 dollars ahead.
Went to a local shop and asked them to meet me in the middle and got nowhere.
Offered to take a 40.00 transfer fee instead..
Are margins really that tight and how does grab a gun...
Not sure how often Optics Planet has these 10% off sales but a heads up anyway. I've noticed that Optics Planet seems to have a wider and wider array of gun stuff such as bigger AR parts selection.
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Bobro 1" Extra-Extended Precision Optics Mount Quick Detach.
In great shape.
Bobro Engineering | Precision Optic Mount Extended 1" Rings
$100.00 in the Albany / Corvallis area. I am willing to ship if the buyer pays actual shipping costs. I will accept Paypal friends and family or a postal...
Link is from TTAG
AR-15 Red Dot Sights and Astigmatism - How to Diagnose and What to Do - The Truth About Guns
I have an astigmatism and it does cause me problems. Anyone else?
US Optics SN4 1.5-6x with JNG MIL reticle
In great condition with very little use. Priced to move at $925!
I bought this scope about 7 years ago, mounted it on my AR and shot ~200 rounds at the range, and it's been sitting in the safe since. Since I'm shooting reddots and fixed power scopes...
Has anyone ever seen one of these? Tried one of their optics? Own one of their optics?
Do you know anything about them? So I went to two different FFL’s today for transfers and found at Rehv Arms two Riton Optic scopes. I picked one up and looked through it. One word describes the clarity of...
Looking to sell my Lucid HD7 Red Dot. I’ve had it for a few years and it has worked fine for me. Picked up an Aimpoint so I dont have a need for it anymore - price drop $90 OBO.
Located in Vancouver, WA.
NWFA worked well for selling some stuff so I figured I would give it another shot.
Edit: SOLD
I bought this scope two years ago for a build but went a different way with it. This scope is brand new in box and is absolutely flawless. It has literally sat in my closet minutes after opening my...