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Re: [OM] Does anyone understand the ND filter selection here?

Subject: Re: [OM] Does anyone understand the ND filter selection here?
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Tue, 18 Mar 2014 15:57:22 -0400
Aha! It's the sponsors.  Now it makes sense.  Don't know why I typed 
variable when I knew it was graduated for sky/ground.

Chuck Norcutt


On 3/18/2014 9:28 AM, Jez Cunningham wrote:
> Probably because it's the one he's got in his bag.
> I think he's sponsored by Lee Filters and they make a 'Big Stopper' (10
> stops) and recently a smaller (3 stop) one that they call (no, really?) the
> Little Stopper.
> Jez
>
> btw (pedant alert)  - the other is a GRADUATED ND filter not a VARIABLE.
>
>
> On 18 March 2014 12:09, Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
>
>> Brian posted this link from Phase One recently
>> <
>> http://www.phaseone.com/en/Imaging-Software/Capture-One-Pro-7/Tutorials.aspx?openpopup=yes&url=www.youtube.com/watch?v=vx1Q0MGK3_0&utm_source=Apsis&utm_medium=Software_eblast&utm_content=mainimage&utm_campaign=w1214_software
>>>
>>
>> The video is in 2 parts (capture & post-processing) and my question only
>> pertains to part 1.  The photog takes a landscape photo using a 10 stop
>> ND filter combined with a variable ND filter and throughout the process
>> he speaks of reducing the contrast in the scene.  He also mentions using
>> a long exposure to blur the scudding clouds.
>>
>> I don't recall the exact number but I think he ended up with a daylight
>> exposure of about 45 seconds.  I understand the use of the variable ND
>> filter to reduce the brightness of the sky but I don't understand the
>> use of a 10 stop ND filter.  Clearly the 10 stop ND filter is
>> responsible for the very long shutter speed but why so long.  It seemed
>> to me that the clouds were moving fairly briskly and that such a long
>> shutter speed wouldn't be required to simply blur the clouds.
>>
>> It there some other reason for using that 10 stop ND filter that I don't
>> know about?
>>
>> Chuck Norcutt
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