Digital Circular Polarizing
Posted on Monday, November 15, 2010 in Photography
How many stops will this polarising filter reduce the light?
It is the Hoya 58mm Pro-1 Digital Circular Polarising Filter.
http://www.amazon.co.uk/Hoya-58mm-Digital-Circular-Filter/dp/B000KL7J3A
Every Polarising filter halves the light passing through it, it doesn't vary as far as exposure goes it's always two f stops.
What does vary is the effect on Polarised Light, Light that is oscillating in only one plane, mainly from a blue sky, as soon as it is diffused or reflected off an object the Light ceases to be Polarised. For everything else it's two f stops.
Polarising filters are alternate black and clear lines, overall half of the area of the filter is black, hence the two f stops, these lines are less than the wavelength of light wide, polarised light oscillating in one plane will be varied, if the lines on the filter line up with the polarised light that part of the image, and only that part of the image, will be brighter, if the direction of polarised light opposes the direction of the lines on the filter the polarised light will be dimmer (by a further two f stops).
Chris
Whats On My YouTube Today?
Circular Polarizer Example 1
Here Are A Few Items From Amazon You Might Be Interested In.
 62mm Circular Polarizing Multi-Coated Glass Pro 1 Digital Filter Sale Price: $69.00  Eligible for free shipping!Availability: Usually ships in 24 hours  |
 52mm Circular Polarizing Multi-Coated Glass Pro 1 Digital Filter List Price: Sale Price: $39.29 You save: $41.84 (52%) Eligible for free shipping!Availability: Usually ships in 1-2 business days |
 Hoya 77mm DMC PRO1 Digital Circular Polarizer Glass Filter List Price: Sale Price: $97.95 You save: $226.80 (70%) Eligible for free shipping!Availability: Usually ships in 24 hours |
 Hoya 62mm DMC PRO1 Digital Circular Polarizer Glass Filter List Price: Sale Price: $89.96 You save: $142.29 (61%) Eligible for free shipping!Availability: Usually ships in 1-2 business days |
 Hoya PRO1 Digital CIRCULAR PL - Filter - circular polarizer - 67 mm List Price: Sale Price: $59.95 You save: $192.30 (76%) Eligible for free shipping!Availability: Usually ships in 1-2 business days |
 AGFA Digital Multi-Coated Circular Polarizing (CPL) Filter 72mm APCPF72 List Price: Sale Price: $10.99 You save: $37.00 (77%) Eligible for free shipping!Availability: Usually ships in 1-2 business days |
 Hoya 72mm HD Hardened Glass 8-layer Multi-Coated Digital Circular Polarizer Filter List Price: Sale Price: $109.88 You save: $222.37 (67%) Eligible for free shipping!Availability: Usually ships in 24 hours |
 AGFA Digital Multi-Coated Circular Polarizing (CPL) Filter 52mm APCPF52 List Price: Sale Price: $8.99 You save: $13.00 (59%) Eligible for free shipping!Availability: Usually ships in 1-2 business days |
 AGFA Digital Multi-Coated Circular Polarizing (CPL) Filter 77mm APCPF77 List Price: Sale Price: $11.99 You save: $40.00 (77%) Eligible for free shipping!Availability: Usually ships in 1-2 business days |
 AGFA Digital Multi-Coated Circular Polarizing (CPL) Filter 55mm APCPF55 List Price: Sale Price: $9.99 You save: $18.00 (64%) Eligible for free shipping!Availability: Usually ships in 1-2 business days |
Items recently purchased on this site:
Savings Pkg Lens Accessory Kit for Canon EF-S 18-55mm, 58MM 3 Pcs UV CPL FLD Filter Kit with Hood + Cap + Keeper, Essential lens and filter kit for CANON EOS 400D 350D 300D 7D 60D, 58mm 3PC Filter Kit UV FLD CPL Polarizing + Accessory for Canon T3 T3i, Hoya-HMC 55mm Lens Protect Kit f/ DT 18-55mm f/3.5-5.6, 58mm Wide 0.45x+Tele 2x+Flash+Filter set+Macro For Canon EOS 600d 1100d 7d D-slr, 0.45x WIDE+FLASH+TELE 2x+FILTER LENS SET For Sony Alpha 55mm A450 A550 A500 A850, Camera essentials kit for Olympus C730 adapter tube, 52mm 2x Telephoto + close up kit + UV CPL ND4 filter for Nikon D60 D5000 D5100, WIDE ANGLE TELE Lens Filter Accessory KIT FOR Canon EFS 18-55mm f/3.5-5.6 IS SLR, Hood+Macro-Set+Filter kit For Sigma 18-200mm f/3.5-6.3, Remote Control+Lens Hood+Filter Set For Canon EOS 60D Rebel T2i/T3i 5D Mark III, For Canon EOS 7D 60D 5x 52mm Filter Set+Lens Hood+Cap Holder+Pen+Cleaning Cloth, For Canon EOS 60D Rebel T2i T3i T1i T3 XSi XS 58mm UV Filter+Lens Hood+LCD Pen, UV+Close Up Filters+Lens Hood+Pen For 58mm Canon EOS 60D Rebel T2i T3i T1i T3, New WIDE+TELE+FLASH+MACRO+FILTER SET LENS FOR Sony A560 A580 A290 A390 55mm DSLR, 3in1 Lens Cleaning Pen Lenspen Kit For DSLR/SLR/VCR/DC, 2.2X HD TELE PHOTO WITH HARD LENS HOOD + FILTER KIT FOR NIKON D60 18-105MM, 67MM 2.2X HD PROFESSIONAL TELE LENS + HOOD FOR CANON 7D EF-S 18-135MM F/3.5-5.6, 2.2X TELE LENS ZOOM + FILTER KIT + HOOD FOR CANON 40D EF-S 18-135MM F/3.5-5.6, 67MM 2.2X TELEPHOTO LENS + HOOD + FILTER KIT UV CPL FLD FOR NIKON D5000 16-85MM, 2.2X Telephoto lens 72mm + lens adapter + UV CPL FLD filter kit for Sony DSC-HX1, 2x Tele+0.45x Wide+Flash+Macro+Filter kit For Pentax k-110d k-200d k-100d k-2000, New Wide Angle+Flash+Tele+ Filter lens Set For Nikon D7000 D3100 D5100 D3s D3000, 2x TELE+WIDE 0.45x+FLASH+MACRO+FILTER Kit For Sony Alpha A380 A330 A230 55mm SLR, Flash + tripod + UV CPL filter kit + adapter for Fujifilm S602 S4900 S6900, Essential Kit for Canon G11 G12 Includes: Wide Telephoto Close Up and Filter Kit, Essential Lens and Filter Kit for Canon G10 G11 G12, Telephoto + Soft Fisheye lens + Close up Set + Hood for Canon Rebel T3i T3 T2i, Essential Kit for Panasonic FZ28 FZ38 Includes 2X Tele + 0.43X Wide + UV CPL FLD, 0.45x Wide+Tele 2x +Flash+Macro+Filter Set For Nikon AF D3 D5000 D3000 D200 52mm, 52mm 2 Lens 3 Filter KIT POP UP Flash diffuser 18-55mm, VCCKIT FOR SONY A290 A390 A500 A33 WIDE ANGLE MACRO TELE LENS FILTERS KIT Hood +, VCCKit FOR Nikon D3100 D3000 D5100 D5000 Lens Filter Hood POP UP 18-55mm, 2X TELE + 0.45X WIDE ANGLE + UV CPL FLD FILTER KIT+POP UP FOR NIKON D5100 D3100, 2X Telephoto + 0.43X Wide Angle + UV CPL FLD Filter Kit for Canon G10 G11 G12, Telephoto + Wide Angle + Filter Kit + Close-Up Set + Hood for Canon, Essential Lens and Filter set for Canon SX1 SX10 SX20 IS, Essential Kit f/ Canon Rebel T3i T3 T2i XTi XSi XS EOS 1100D 600D 550D 500D 450D, Wide Fisheye + Telephoto Zoom Lens + Close Up Set for Olympus E-620 E-510 E-450, Professional Lens Kit for Nikon D3200 D5100 D5000 D3100 D3000, Essential kit for Canon Rebel T3i T3 T2i T2 T1i XTi XT XSi XS, 58 MM Elemental Lens and Filter kit for Canon T3i T3 600D 550D 18-55mm, Wide Angle + Telephoto + Filter Kit + Close up set for Nikon D3000 D5000 D7000, Professional Kit 0.43X 2X + Lens UV CPL + Close up Filter + Hood for Canon 5D 7D, Lens and Filter Kit for Nikon D3200 D7000 Wide + Tele + Close Up + UV CPL FLD, 0.45x Soft fisheye UV CPL polarized FLD filter lens kit for Canon T3i 600D 1000D, 2.2X TELEPHOTO + 0.43X WIDE ANGLE LENS + UV CPL FLD FILTER KIT FOR FUJI S200EXR, 67MM WIDE ANGLE MACRO + TELEPHOTO LENS + FILTER KIT FOR FUJI FINEPIX S100FS, 2.2X TELEPHOTO + 0.43X WIDE LENS + FILTER KIT UV/CPL/FLD FOR FUJI S205EXR, 0.45X Wide Angle + 2X Telephoto + Filter Kit + Close Up Set for Nikon D70 D90, 2.0x Telephoto + 0.43x Wide Angle + UV CPL ND4 + Pen for 67MM Nikon D7000 D80, 2.0X Telephoto + Fisheye + CPL + Cap + Keeper for Canon 60D with 18-135mm Lens, 2.0x Telephoto + 0.43x Wide Angle Lens + UV CPL Filters for 67MM Nikon D90 D80, 2.0x Telephoto + 0.43x Wide Angle w/macro for Canon 60D with 17-85mm/18-135mm, Essential 2.0X Telephoto + 0.43X Fisheye + UV + CPL for 67MM Canon 50D 7D 60D, Essential 67MM 2.0x Telephoto + 0.43x Fisheye + Cap + Filter and Cleaning kit, 67MM 0.43x Wide Angle Lens w/ macro, Telephoto + CPL + Keeper for Canon 50D 60D, 67MM 0.43x Wide Angle lens + 2.0x Telephoto for Canon 60D 7D with 18-135mm Lens, 67MM 2.0X Telephoto + Fisheye + CPL + Cap + Keeper for for Canon 50D 7D 60D,
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Tags: polarizer, stuff, photo
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