User Tag List

Thanks useful information Thanks useful information:  0
Results 1 to 15 of 15

Thread: When *NOT* to use a Circ Polariser Filter

  1. #1
    Member Calxoddity's Avatar
    Join Date
    24 Apr 2008
    Location
    Wollongong
    Posts
    473
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    When *NOT* to use a Circ Polariser Filter

    Hi from dank and miserable Wellington (just thought I'd mention that to get it off my chest...).

    I discovered last week that my love of using the circ polarising filter has its limits.

    On my drive down to Canberra I stopped at Lake George to take some pikkies looking back across the lake to the wind farms on the eastern shore. The resulting shots were really nice - great light, stark colour contrasts, nice feeling of isolation etc. I got a little excited and then thought "this is too good to waste - I'm gonna take a series of shots for a pano."

    Pano planning went well - 21 overlapping shots at 70mm in portrait mode, for a majestic 135 degree sweep of Lake George.

    Took the pikkies home and proceeded to stitch them together. O Noes! I left the circ polariser on, and now the different blue depth of sky across the arc of the pano has been chopped into little pieces in the pano stitching. I now have slivers, kites and other odd patches of different blues dangling in the sky across the middle section of the pano. Despite all efforts to fix, no joy so far - the hue/saturation differences are too stark.

    Moral of the story - if you're gonna do a big pano, take the circ polariser off before you start...

    (I'm considering replacing the sky altogether, but that somehow feels like cheating).

    Regards,
    Calx
    Calxoddity
    Concert Pianist, Test Pilot, Pathological Liar


    Nikon D40, Sigma 17-70 F2.8-4.5 HSM, Nikkor AF-D 50mm f1.8
    Post Processing: Aperture 3 & Photoshop Elements 6

  2. #2
    Member
    Join Date
    28 Apr 2008
    Location
    Bathurst
    Posts
    818
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yeah I found that out that Hard way a while a go too!

    Because as your panning, your changing the angle in which the light is being being filtered resulting in some funky results when stitching lol

    My CPL is constantly attached to my 17-40, hence i don't do panos that often
    Cheers, Brad




  3. #3
    A royal pain in the bum! arthurking83's Avatar
    Join Date
    04 Jun 2006
    Location
    the worst house, in the best street
    Posts
    7,701
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    With a note in mind to announce my lack of pano experience, and with all of my experience coming form the use of a UWA(10-20mm siggy) only...

    generally I find that when attempting such a wide FOV, if the conditions aren't so bad and the difference in hues are so huge, you should be able to process the differences out. ie. lighten the darker areas and darken the light areas to get to a reasonable middle ground.

    ofd course time of day is imperative to do this properly.. but even that is not the only limitation/clause! Location(from the equator) may have a large impact and time of year too.
    I find that during mid autumn to mid spring(approx) you can get better results more often than say during daylight savings time(approx).
    I have no exact scientific proof, just my observations over the past few years in doing it more and more.

    One more thing: if you shoot during the day at at midday)or when the sun is directly overhead, there should be no issue doing a full 360° pano as the polarised light will be the same at any direction you look(ie. 90° to the angle of the sun)

    .. but who shoots at midday huh?

    I also use GND's to balance the sky as much as possible too... but you're right it is easier to do a pano without a CPL.
    Nikon D800E, D300, D70s
    {Nikon} -> 50/1.2 : 500/8(CPU'd) : 105/2.8VR Micro : 180/2.8ais : 105mm f/1.8ais : 24mm/2ais
    {Sigma}; ->10-20/4-5.6 : 50/1.4 : 12-24/4.5-5.6II : 150-600mm|S
    {Tamron}; -> 17-50/2.8 : 28-75/2.8 : 70-200/2.8 : 300/2.8 SP MF : 24-70/2.8VC


  4. #4
    Ausphotography Regular
    Join Date
    05 Jan 2010
    Location
    Melbourne
    Posts
    1,832
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks for the tip......but can we see?

    Roo
    Call me Roo......
    Nikon D300s, Nikon 35mm 1.8 DX, Nikkor 50mm 1.4 Af-S, Nikon 18-200mm VR, Nikon 70-200VRII 2.8, Sigma 105 Macro, Sigma 150-500mm f5-6.3 APO DG OS HSM, Tokina 12-24mm, Sb-600, D50, Nikon 1.7 T/C, Gitzo CF Monopod

  5. #5
    It's all about the Light!
    Tech Admin
    Kym's Avatar
    Join Date
    15 Jun 2008
    Location
    Modbury, Adelaide
    Posts
    9,633
    Mentioned
    10 Post(s)
    Tagged
    0 Thread(s)
    Maybe a bit of research would have helped...

    http://www.ausphotography.net.au/for...d.php?p=320293

    5: remove filters, especially polarisers
    regards, Kym Gallery Honest & Direct Constructive Critique Appreciated! ©
    Digital & film, Bits of glass covering 10mm to 500mm, and other stuff



  6. #6
    Go the Rabbitohs mudman's Avatar
    Join Date
    23 Oct 2008
    Location
    Canberra
    Posts
    3,090
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Calxoddity View Post
    (I'm considering replacing the sky altogether, but that somehow feels like cheating).
    Calx
    it's only cheating if you are caught. so tell anyone.
    cheers
    cc and enjoy

    Photography is painting with light

    K7, Pentax 18-250mm zoom, Pentax 100mm macro, Sigma 50-500mm
    Velbon Sherpa tripod Photoshop CS6

  7. #7
    Ausphotography Regular
    Join Date
    23 Jan 2009
    Location
    Hobart
    Posts
    569
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Also learned that one the hard way. It's a pretty big club, so don't feel alone
    Last edited by stoogest; 20-05-2010 at 7:13pm. Reason: typo
    http://twoclownstripping.com

    Nikon D7000
    Sigma 10-20mm ~ Nikon 18-55mm ~ Nikon 55-200mm ~ Manfrotto 190XProB ~ Manfrotto 488RC2
    ~ LowePro Top Load Zoom 1


  8. #8
    Member darylcheshire's Avatar
    Join Date
    16 May 2010
    Location
    Edithvale
    Posts
    63
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    My Sony DSC-WX1 has an automatic pano mode where it takes 6 or so photos in succession as you swing around.
    My latest attempt was with the camera pressed against the window of a moving train.

    Came out weird, all chopped up. It expects you to be swing around in an arc.

    Might try with my 5D MkII from a moving train and then process in PS.

    Daryl

  9. #9
    Member Briancd's Avatar
    Join Date
    14 Aug 2006
    Location
    Sanctuary Point - 2 hours south of Sydney
    Posts
    237
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Here is my first lesson in why not to use a CP filter on a pano. As you can see there is a dramatic difference between the left and right side of the sky.
    Attached Images Attached Images
    Brian

    My two pet hates are male chauvanists and women who won't do as they are told

    Canon 60D - Canon 17-40mm f4 L USM - Canon 70 - 200mm F4 L IS USM - CANON 24-105MM f4 IS USM - Sigma EF-500 DG Super Flash - Lightroom 4.4 - Photo Elements 11 ****

  10. #10
    Member
    Threadstarter
    Calxoddity's Avatar
    Join Date
    24 Apr 2008
    Location
    Wollongong
    Posts
    473
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Hi again,
    Sorry, I'd love to post the image, but it's 17,600 x 2600, and it's on my Mac at home. I'll be back home in around 36 hours, so if I can trim it to show the offending section, I'll post it on Saturday night.

    And yes, I should have rtfm (or rtff in this case).

    Brian - imagine your pano with the deep blue only in the middle, with blue boxes and stripes in the deep blue...

  11. #11
    Member
    Threadstarter
    Calxoddity's Avatar
    Join Date
    24 Apr 2008
    Location
    Wollongong
    Posts
    473
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Hi yet again...

    Here's 2 photos to show the detail:

    Photo 1 is a standard single shot, showing how the sky looked
    Photo 2 is the pano - sorry if it's a bit squashy, but you can see the sky effect.
    Attached Images Attached Images

  12. #12
    Member
    Join Date
    06 Jan 2010
    Location
    Perth Area
    Posts
    126
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Any post processing to whatever the camera has captured is "CHEATING". We all CHEAT! The amount of cheating depends on what your client or yourself require in the finished product and if the cheating has worked and all are happy with the end result, then you have the "PERFECT" shot! Those who are better at PP may be considered a "Better Photographer" than those who are not so gifted at PP.
    I make the above statements with TIC.

  13. #13
    A royal pain in the bum! arthurking83's Avatar
    Join Date
    04 Jun 2006
    Location
    the worst house, in the best street
    Posts
    7,701
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Technically speaking.. capturing 11 images and stitching them into a single panorama image is as much cheating as it would be to overlay another sky into the panorama itself.

    To me that process sounds too complicated!

    I'd be inclined to use the clone/heal tool in PS to smooth out the graduation of blues in the sky into a single looking graduation of colour. Of course I say that, having never done it myself, but I have corrected for such differences in a single image myself(sometimes successfully, other times not very!)

  14. #14
    Shore Crawler Dylan & Marianne's Avatar
    Join Date
    21 Mar 2009
    Location
    Adelaide
    Posts
    8,382
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    one wonders what the context aware button can do in CS5 lol.
    anyway, I learned the hard way too - not so much of an issue with clouds in the sky though
    brian , your example wasn't too bad at all ! that looked like a natural progression of light to shade from a light source on the left - I've seeen and done far worse hehe - if that's the worst you got, you've gotta have pearls for trash!
    Call me Dylan! www.everlookphotography.com | www.everlookphotography.wordpress.com | www.flickr.com/photos/dmtoh
    Canon EOS 5dmk3 : 17-40 F4 L, 70-200F2.8 canon L, 24-70mm canon L, Gitzo Safari +1178 ballhead. |Canon 5dmkII, 16-35mmF2.8 II L, Gitzo 2541 )
    Singh Ray/Hitech/Lee assorted filters, Z pro modified system Cokin holder
    Post : Lightroom 3.6 catalogue -> Export as 16bit TIFF, Edited CS5 -> resized for web.

  15. #15
    Fishy bricat's Avatar
    Join Date
    06 Apr 2010
    Location
    Melbourne
    Posts
    747
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    AS dtoh said. The sun could be in that corner. I didn't find it too bad. cheers

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •