Auto Focus
by admin on Friday, January 30th, 2009 | No Comments
How does Auto-Focus work on cameras?
How does the camera know when things are in focus? Isn't that subjective or is there a math formula to explain it?
thanks.
auto focus is going to look for areas of contrast. Try autofocusing on a white wall or a black sheet of paper and you'll see it searching to lock on to something. Move to the edge of the paper where you have a contrast change and now you'll be able to focus!
Hope it helps.
http://www.levori.com
Canon EOS 7D - Versatile Auto Focus 1/8
|
|
Ford : Focus SEL Sedan Navigation! Power Sunroof! Auto parking! MSRP $26,165 $23,303.00 |
|
|
Ford : Focus SE Hatchback Cruise! Keyless entry! Auto headlights! We Finance and Export! MSRP $20,980 $18,397.00 |
|
|
Canon EF 800mm f/5.6L IS USM Autofocus Lens - NEW! $15,335.91 |
|
|
Canon EF 800mm f/5.6L IS USM Autofocus Lens - NEW! $15,335.84 |
|
|
NEW! Canon 800mm EF f/5.6L IS USM Autofocus Lens $15,335.80 |
|
|
Ford : Focus WE FINANCE!! 2010 FORD FOCUS SEL SEDAN SYNC AUDIO IPOD 6CD HTD LEATHER SEATS SUNROOF AUTO 30K $13,790.00 |
|
|
Motorized auto-focus upright biological microscope PW-AT1800 $11,999.99 |
|
|
Nikon 400mm f/2.8G ED AF-S VR Autofocus Lens - Nikkor US Warranty NIB $9,487.50 |
|
|
Laser Engraver Cutter L24 CO2 60W 24"x18" USB Autofocus $6,995.00 |
|
|
Sony SAL-300F28G 300mm f/2.8 APO G SSM Autofocus Lens $6,297.93 |
|
|
Sony SAL-300F28G 300mm f/2.8 APO G SSM Autofocus Lens $6,297.86 |
|
|
Sony SAL-300F28G 300mm f/2.8 APO G SSM Autofocus Lens $6,297.82 |
|
|
NEW YAG Metal Capacitor Induction Auto Focus Laserhead $6,265.00 |
|
|
Canon Telephoto EF 400mm f/4.0 DO IS USM Autofocus Lens $6,144.20 |
|
|
Canon Telephoto EF 400mm f/4.0 DO IS USM Autofocus Lens $6,144.13 |
|
|
Canon Telephoto EF 400mm f/4.0 DO IS USM Autofocus Lens $6,144.09 |
|
|
Nikon Nikkor 600mm F/4 AF-I lens case filters F/4.0 autofocus DSLR camera AF-S $6,125.00 |
|
|
Nikon Nikkor 600mm F/4 AF-I lens case filters F/4.0 autofocus DSLR camera AF-S $6,000.00 |
|
|
Sigma 500mm f/4.5 EX DG APO Autofocus Lens For Sony $4,765.81 |
|
|
Sigma 500mm f/4.5 EX DG APO Autofocus Lens For Pentax $4,765.81 |
|
|
Sigma 500mm f/4.5 EX DG APO HSM Autofocus For Canon+Wty $4,765.81 |
|
|
Sigma 500mm f/4.5 EX DG APO HSM Autofocus Len For Nikon $4,765.81 |
|
|
Hasselblad Ultra-Wide Angle HCD 28mm f/4.0 Auto Focus Lens # 3023028 $4,495.00 |
|
|
myReader2 - 15 Inch LCD Color Auto Focus $3,850.00 |
|
|
Canon EF 14mm f/2.8L II USM Autofocus Wide Angle Lens $3,798.92 |
|
|
Canon EF 14mm f/2.8L II USM Autofocus Wide Angle Lens $3,798.85 |
|
|
Canon EF 14mm f/2.8L II USM Autofocus SUPER-WA Lens $3,798.81 |
|
|
Hasselblad Zoom Wide Angle-Telephoto 50-110mm f/3.5-4.5 HC Auto Focus Lens $3,600.00 |
|
|
AMAT LION PREC. EN193 AUTOFOCUS KIT P/N 060473-2 0240-A6770 $3,468.13 |
|
|
Ash - Horizon 19 Inch LCD Color Auto Focus CCTV $3,450.00 |
|
|
Patriot Platinum 22" Auto-Focus Color Video Magnifier $3,395.00 |
|
|
Polaroid Sonar OneStep Autofocus SX70 SX-70 *RAREST GOLD!* *MIB!* Museum Piece! $3,000.00 |
|
|
Sigma Zoom Telephoto 120-300mm f/2.8 EX DG APO IF HSM Autofocus Lens for Canon E $2,999.00 |
|
|
Sigma Zoom Telephoto 120-300mm f/2.8 EX DG APO IF HSM Autofocus Lens for Nikon A $2,999.00 |
|
|
Mezzo - 15 Inch LCD Color Auto Focus CCTV $2,995.00 |
|
|
Nikon Nikkor 500mm f/4 AF-I Autofocus Lens! No Reserve! $2,900.00 |
|
|
Eclipse 15 Inch LCD Auto Focus Desktop Video Magnifier $2,890.00 |
|
|
Patriot Platinum Advanced Auto Focus Video Magnifier $2,795.00 |
|
|
Canon EF 28-300mm f/3.5-5.6L IS USM Autofocus Lens NEW $2,525.97 |
|
|
Presto 15-inch LCD Auto Focus Desktop Video Magnifier $2,435.00 |
|
|
Canon EF 70-300mm f/4-5.6L IS USM Autofocus Lens NEW $2,399.01 |
|
|
Saturn : S-Series SL2 AUTO Super Clean, 35 mpg No Reserve Ford Focus Chevy Honda Civic Toyota Corolla $2,325.00 |
|
|
Canon EOS 60D Digital SLR Camera Body w/70-300 f/4-5.6L IS USM Autofocus Lens $2,218.00 |
|
|
NEW Optelec ClearView+ 22 Inch LCD Color Auto Focus CCTV (for vision impared) $2,200.00 |
|
|
Presto 15 Inch LCD Auto Focus Desktop Low Vision Video Magnifier $2,190.00 |
|
|
Canon EF 70-200mm f/2.8L IS II USM AutoFocus Telephoto Zoom Lens - USA #2751B002 $2,174.00 |
|
|
Nikon F6 35mm SLR Autofocus Camera Body $2,128.95 |
|
|
Canon EF 85mm f/1.2L II USM Autofocus Lens 1056B002 $2,113.42 |
|
|
Canon EF 85mm f/1.2L II USM Autofocus Lens 1056B002 $2,113.35 |
|
|
Canon EF 85mm f/1.2L II USM Autofocus Lens 1056B002 $2,113.31 |
|
|
Canon EF 85mm f/1.2L II USM AutoFocus Telephoto Lens - Gray Market #1056B002 $2,049.00 |
|
|
KLA Tencor 710-711754-00 Autofocus Board $1,999.99 |
|
|
Canon EF 85mm f/1.2L II USM AutoFocus Telephoto Lens - USA #1056B002 $1,939.00 |
|
|
Clarity Discovery - Color Auto Focus Camera $1,895.00 |
|
|
Canon EF 85mm II f/1.2L USM Autofocus Lens 85 mm $1,850.00 |
|
|
Nikon F6 Professional Auto Focus Camera Body Boxed 99% Mint Used Just Once $1,799.99 |
|
|
Sony SAL-70400G 70-400mm f/4-5.6 G SSM Autofocus Lens $1,796.93 |
|
|
Sony SAL-70400G 70-400mm f/4-5.6 G SSM Autofocus Lens $1,796.86 |
|
|
Sony SAL-70400G 70-400mm f/4-5.6 G SSM Autofocus Lens $1,796.82 |
|
|
AMAT LION AutoFocus Capacitors KIT STING 0240-A6790 $1,776.82 |
|
|
Canon EF 50mm f/1.2L USM Autofocus Lens Free Shipping EMS $1,759.99 |
|
|
Contax 645 45-90mm f4.5 Vario-Sonnar T* Auto Focus Lens $1,749.00 |
|
|
Nikon 24-70mm f/2.8G ED Nikkor Wide Angle-Telephoto AF-S Zoom Autofocus Lens $1,729.99 |
|
|
Canon EF 16-35mm f/2.8L II USM Autofocus Lens - New $1,699.00 |
|
|
Canon EF 16-35mm f/2.8L II USM Autofocus Lens $1,699.00 |
|
|
Canon EF 16-35mm f/2.8L II USM Autofocus Lens Brand New $1,699.00 |
|
|
Canon EF 16-35mm f/2.8L II Zoom Wide Angle USM Autofocus Lens 16-35 mm USA $1,699.00 |
|
|
Nikon 80-400mm f/4.5-5.6D ED Autofocus VR Zoom NEW $1,669.00 |
|
|
Canon 70-200mm f/2.8 L IS Ultrasonic Auto Focus Telephoto Zoom Lens (#158431) $1,669.00 |
|
|
Pentax SMCP-DA 60-250mm f/4 ED (IF) SDM Auto Focus Telephoto Zoom Lens #21750 $1,649.00 |
|
|
Canon EF 24mm f/1.4L II USM AutoFocus Wide Angle Lens - Grey Market #2750B002G $1,639.00 |
|
|
Contax Zeiss 85mm Planar F1.4 Auto Focus Lens Mint for N1, NX, N Digital Cameras $1,629.99 |
|
|
Canon EF 24mm f/1.4L II USM Autofocus Lens $1,625.85 |
|
|
OPTELEC O510AP Clearview+ Color Autofocus Magnifier $1,599.91 |
|
|
Nikon F6 35mm SLR Auto Focus Film Camera (Excellent Grade) (#0023558) $1,599.00 |
|
|
Canon Zoom Wide Angle Telephoto EF 24-70mm f/2.8L USM Autofocus Lens + Kit NEW! $1,589.95 |
|
|
Nikon Telephoto AF Micro Nikkor 200mm f/4.0D ED-IF Autofocus Lens New $1,568.92 |
|
|
Nikon Telephoto AF Micro Nikkor 200mm f/4.0D ED-IF Autofocus Lens New $1,568.85 |
|
|
Nikon Telephoto AF Micro Nikkor 200mm f/4.0D ED-IF Autofocus Lens New $1,568.81 |
|
|
Sony CCD High Speed 150m IR 18X Optical Zoom Dome PTZ Camera CCTV Auto Focus $1,554.99 |
|
|
Leitz (Leica) Laser Autofocus Module for Ergoplan Micro $1,550.00 |
|
|
Sigma 50-500mm f/4.5-6.3 DG OS HSM APO Autofocus Canon Mount 738101 BRAND NEW! $1,549.99 |
|
|
Nikon Nikkor 17-55mm f/2.8G ED-IF AF-S DX Super Wide Angle Zoom Autofocus Lens $1,547.83 |
|
|
Canon EF 24mm f/1.4L II USM AutoFocus Wide Angle Lens - USA #2750B002 $1,541.00 |
|
|
Nikon 24-70mm f/2.8 G ED Wide Angle Telephone AF-S Zoom Autofocus Lens $1,525.00 |
|
|
Canon EF 180mm f/3.5L Macro USM Auto Focus Lens+KIT NEW $1,511.97 |
|
|
Polaroid Time Zero Sonar SX70 Autofocus SE *Fade To Black Kit* +TZ Artistic Film $1,500.00 |
|
|
Canon EF 180mm f3.5L Macro USM AutoFocus Telephoto NEW $1,499.00 |
|
|
Nikon 70-200mm f/2.8 G ED IF AF-S VR Auto Focus Telephoto Zoom Lens (#375534) $1,499.00 |
|
|
Low Vision Magnifier 17"LCD Color Autofocus Merlin-1 CCTV by Enhanced Vision $1,495.00 |
|
|
Pentax SMC Pentax-FA* 28-70mm f/2.8 AL Power Zoom Auto Focus AF MINT- $1,495.00 |
|
|
Ash - Prisma Auto Focus Video Magnifier $1,490.00 |
|
|
Sony SAL-35F14G Wide Angle 35mm f/1.4G Autofocus Lens $1,468.94 |
|
|
Canon EF 50mm f/ 1.2L USM Autofocus Lens. $1,468.68 |
|
|
Canon EF 50mm f/ 1.2L USM Autofocus Lens. $1,468.57 |
|
|
Canon EF 35mm f/1.4L USM Wide-Angle Autofocus Lens - New! $1,461.92 |
|
|
Contax 645 35mm f3.5 Distagon T* Auto Focus Lens $1,449.00 |
|
|
Canon EF 16-35mm f/2.8L II USM Autofocus Lens - New $1,444.00 |
|
|
Nikon AF-S Nikkor 300mm f/4.0D ED-IF Autofocus Lens New $1,432.28 |
|
|
Nikon 135 mm f/2.0D Telephoto AF DC Autofocus Lens NEW* $1,419.97 |