The depth of field is the region where the size of the circle of confusion is less than the resolution of the human eye. Circles with a diameter less than the circle of confusion will appear to be in focus.Lens and ray diagram for calculating the circle of confusion diameter c for an out-of-focus subject at distance S2 when the camera is focused at S1.  The auxiliary blur circle C in the object plane (dashed line) makes the calculation easier.An early calculation of COC diameter ("indistinctness") by "T.H." in 1866.
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6x9 Inch

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3 1/2 Inch
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6x9 Inch
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Eclipse Sp6500 6-1/2" 6.5" Component Car Speakers $69.00 Eclipse Sp5000 5-1/4" 5.25" Component Car Speakers $69.00
New Eclipse Se8355 5-1/4" 5.25" Coaxial Car Speakers $57.00 Pyle 6.5" Car Audio Component 6 1/2 Speaker System 2008 $59.95
New Pyle 6x9 Gold 8-Way 1000w Car Audio Stereo Speakers $39.90 Mtx Thunder Axe 6001 6.5" Car Component Set Speakers $99.00
Pioneer Ts-G1341R 5-1/4" 5.25" Coaxial Car Speakers $26.00 New Polk Audio Momo 6x9 3way Car Stereo Marine Speakers $112.90
4 Kenwood Kfc-C6882ie 6x8" 3-Way Car Speakers ( 2 Pair) $89.00 New Vr3 1" Dome Tweeters 200 Watt Car Stereo Speakers $27.59
New Vr3 5X7 3 Way Red 100 Watt Car Stereo Speakers $43.93 New Vr3 6.5 Red 3 Way 200 Watt Car Stereo Speakers $43.93
New Pair Vr3 4X6 3 Way Red 100 Watt Car Stereo Speakers $43.93 New Vr3 4" 3 Way Red Round 100 Watt Car Stereo Speakers $43.93
New Vr3 5.25" 3 Way 100 Watt Car Stereo Round Speakers $43.93 New Vr3 2 Red 6X9 3 Way 200 Watts Car Stereo Speakers $43.93
Kicker 10 inch Truck Speakers in case with tweeter $1.00 Pioneer 6X9 boxed speakers $65.00
Speaker Attractive Electro Plated Blue 150W 3-Way New $23.25 Blaupunkt (Thc540) Car Component System $45.00
Jensen 6530 Explorer 140 Watts 3-Way Flush Speakers New $23.25 Kicker Rs5 Car Resolution Component System high end New $64.99
New Kicker 08ks690 Ks-series 6" X 9" Coaxial Speaker $74.99 New Boss Audio La63 Outlaw Speaker (6.5", 3-Way, 400... $28.99
2 New Pyramid 6 X 8 3Way 600w Car Audio Stereo Speakers $16.95 New Sound Storm Force F365 Speaker $15.99
New Boss Chaos Ch6530 Speaker $12.99 Phoenix Gold 400 6.5 Component Car Audio Speaker System $48.90
Jl Audio Tr650-Cxi Coaxial Car Speaker * Pickup Only * $1.00 Pioneer Ts-692 car speakers $15.00
Polk Audio db461P 4x6" 2-Way Plate Speakers 4"x 6" New $59.00 New Pioneer Ts-G6841R 6x8" 2-Way 150 Watts Car Speakers $44.99
Infinity Reference Ref 452I Coaxial Car Speaker $40.00 Kicker Ssmb6 6.5" Midbass Woofers Free-Air Speaker pair $70.00
New Full Set Jbl C508Gti 5.25" Components 500 Watts $9.99 Pair Pioneer Premier Tsd902P 720 Watt 6x9 Car Speakers $107.95
New Hifonics Zxi 52Cx 5.25" 2-Way Car Speakers Zxi52Cx $44.95 2 Pyle Black 240w 6.5" Waterproof Marine/Boat Speakers $38.95
Pair New Pyle 480w 6.5 Car Audio Component Speaker Kit $43.90 Kenwood Kfc-1351s 5-1/4" 140 Watt Peak Speakers (2) New $9.99
Brand New Pair Eclipse Sc6500 6.5" 225W Component Spkrs $10.00 New Pair Eclipse Sc8365 6.5" Component 3 Way Speakers $100.00
New 08 Set Eclipse Point Source Sp6510 6.5" 120W Spkrs $10.00 Blaupunkt Gtx542 5-1/4 180W Car Audio Speakers Pair New $23.00
New Pair Clarion Cmcx7.1S Marine 6.5 " Coaxial Spkrs $84.95
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Prices current as of last update, 10/06/08 11:36pm.


See also...
Infinity, 6x9 Inch, Car Speakers, Car Speakers & Speaker Systems
Kenwood, 6x9 Inch, Car Speakers, Car Speakers & Speaker Systems
Other Brands, 6x9 Inch, Car Speakers, Car Speakers & Speaker Systems
Pioneer, 6x9 Inch, Car Speakers, Car Speakers & Speaker Systems
Sony, 6x9 Inch, Car Speakers, Car Speakers & Speaker Systems

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