Luminous Landscape Forum

The Art of Photography => Landscape Showcase => Topic started by: bobfriedman on March 08, 2020, 07:59:00 am

Title: Willow Pond
Post by: bobfriedman on March 08, 2020, 07:59:00 am

Nikon D800 ,Nikkor 20mm f/3.5 Nikkor-UD Auto ,RG715
1/400s f/5.6 at 20.0mm iso125
(https://pbase.com/bobfriedman/image/170194939/original.jpg)

Title: Re: Willow Pond
Post by: francois on March 08, 2020, 04:03:23 pm

Surreal and spectacular. I like the shapes of the clouds.

By the way, is it the moon in the sky?

Title: Re: Willow Pond
Post by: bobfriedman on March 08, 2020, 05:02:11 pm

Quote from: francois on March 08, 2020, 04:03:23 pm

By the way, is it the moon in the sky?

jet airplane

Title: Re: Willow Pond
Post by: kers on March 08, 2020, 06:06:49 pm

beautiful!  here in the netherlands i only saw this kind of snowlandscape once.
You remind me i also have this lens :) ... a later 1985 type.
Do i understand you use a filter that cuts at 715nmeter - so only Red and short IR passes through?
https://www.itos.de/en/schott-optical-filters/long-pass/rg665-rg695-rg715/

Title: Re: Willow Pond
Post by: bobfriedman on March 08, 2020, 06:15:12 pm

Quote from: kers on March 08, 2020, 06:06:49 pm

.
Do i understand you use a filter that cuts at 715nmeter - so only Red and short IR passes through?

correct, the camera has been modified and the UV/IR cut filter has been replaced with an RG715 long pass which passes some red and infrared up to around 1000 nm or so. I swapped the red and blue channels in photoshop giving the illusion of a blue sky. essentially this is an intensity map of reflective infrared so that material in the scene that is highly infrared reflective is white and materials infrared absorbing are black. in addition to absorption in water there is less penetration so the reflections here are more pronounced.

the snow-like effect is illusory and so is the false color blue sky.   the phenomenology is genuinely reflective infrared.

Title: Re: Willow Pond
Post by: Paulo Bizarro on March 09, 2020, 09:01:22 am

Good result.

Title: Re: Willow Pond
Post by: Eric Myrvaagnes on March 10, 2020, 11:15:02 am

I like this a lot.
Your explanation is a bug help, too, as I couldn't believe all the "snow" this winter.