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ND grad filter for SK 35mm Blue Ring

Tomek Karapuda
Hi,
what can You recommend to use ND grad filter for my SK 35mm that I do not have a vignette effect on the corners?
Thank You
Tomek
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6 comments

Date Votes
  • Permanently deleted user
    I would recommend using LCC to get rid of vignetting and other things such as lens/colour cast.

    It's pretty easy to do, all you need is an opaque piece of white plexi/acrylic glass (about 3-5mm thick and at least as big as your biggest lens diameter).
    You take the photo and then turn the camera+lens towards the light source with the plexi/acrylic glass infront of it and make another exposure with the same parameters.

    That creates a "calibration file" from which you can create a LCC calibration file. That also takes care of (most) dust specs if you wish.

    I use it all the time - whether it's for portraiture, fashion, beauty, landscape, product shots - really everything and it's much easier and more comfortable than an ND filter (at least in my opinion).
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  • cdc
    NNN634219995352219747 wrote:
    Hi,
    what can You recommend to use ND grad filter for my SK 35mm that I do not have a vignette effect on the corners?
    Thank You
    Tomek


    Have you looked into Singh Ray filters? They've got some filters that would be large enough for the lens though I'm not certain which holder you would need.


    C-M-B wrote:
    I would recommend using LCC to get rid of vignetting and other things such as lens/colour cast.

    It's pretty easy to do, all you need is an opaque piece of white plexi/acrylic glass (about 3-5mm thick and at least as big as your biggest lens diameter).
    You take the photo and then turn the camera+lens towards the light source with the plexi/acrylic glass infront of it and make another exposure with the same parameters.

    That creates a "calibration file" from which you can create a LCC calibration file. That also takes care of (most) dust specs if you wish.

    I use it all the time - whether it's for portraiture, fashion, beauty, landscape, product shots - really everything and it's much easier and more comfortable than an ND filter (at least in my opinion).


    I don't follow. Can you please elaborate?

    This sounds more like you're using the white plexi to make a custom white balance or something along those lines. The OP asked about a graduated neutral density filter that will not vignette on a super wide angle lens.
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  • Permanently deleted user
    The ND filter that NNN634219995352219747 was asking for was to remove the vignetting of the SK 35mm BR lens specifically (a "centre-filter") - not just a ND grad filter.

    LCC doesn't have anything to do with white balance but it's a similar process 😊

    You simply take a "neutral" image with the white plexi and allow the computer to remove all the inconsistencies like colour casts or vignetting or dust in order to get a ((almost)) perfect neutral image. This is mainly used for technical cameras with movements but I use it on a daily basis to correct for vignetting and it works very well.

    If you had a source for a really neutral white plexi glass this could also be used for white balance - but I don't have that. All I use is a a cheap piece of plastic 😂

    https://www.youtube.com/watch?v=KBoSHz4kBKA - still works the same in C1 11 - but the algorythm has been improved a lot!
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  • cdc
    C-M-B wrote:
    The ND filter that NNN634219995352219747 was asking for was to remove the vignetting of the SK 35mm BR lens specifically (a "centre-filter") - not just a ND grad filter.

    LCC doesn't have anything to do with white balance but it's a similar process 😊

    You simply take a "neutral" image with the white plexi and allow the computer to remove all the inconsistencies like colour casts or vignetting or dust in order to get a ((almost)) perfect neutral image. This is mainly used for technical cameras with movements but I use it on a daily basis to correct for vignetting and it works very well.

    If you had a source for a really neutral white plexi glass this could also be used for white balance - but I don't have that. All I use is a a cheap piece of plastic 😂

    https://www.youtube.com/watch?v=KBoSHz4kBKA - still works the same in C1 11 - but the algorythm has been improved a lot!


    This makes so much more sense now, thank you for the explanation and link!
    I've never used this technique, I'll have to give it a try.
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  • Tomek Karapuda
    Gentlemen. So far I am using the LEE 100 system with GND filters. When I take pictures, I simply get a vignette effect on the corners of the photo (black corners). It seems to me that the Lee 100 system is too small. What do you think about the 150 system? Would it be enough for the SK 35 lens?
    Tomek
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  • Permanently deleted user
    Ah! Then I apologize, it sounded like you were looking for a center-ND filter and not a new filter system.
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