w/nw fog and mist

I have been reflecting on this thought for a while and here seems to be a good place to say it. When I look at the plethora of wonderful and evocative shots in this thread and have to shake my head in disbelief at some (mainly on other forums) who are addicted to pursuit of lenses that are ever more sharp and perfectly corrected (if there is such a thing - which there is not). Which to me is all like chasing a mirage.
One look at the shots here tells an observer everything they need to know about what counts in making great images - and it is almost never about sharpness as such.
 
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will it rain or not... an every day question in August...
sometimes it's raining up the hill and sunny down below.
A walk with a camera is the rule for each day.
Karuizawa, Nagano Prefecture - Nikon F3P & 50mm f/1.2

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This is neither fog nor mist, but smoke from wildfires in British Columbia. Posting it here due to the photographic effect being similar. If it's inappropriate, I would have no problem with the mods erasing it. In all the years I've lived in eastern Washington, wildfires have been a seasonal hazard. The past few years have been especially bad, not only from brushfires on our side of the state but forest fires in western Washington, Oregon and British Columbia. In August my partner and I went on a socially distanced holiday to her timeshare in Whistler, BC. From our home in Richland, WA all the way to Whistler the drive was marked by smoke from the numerous fires in our corner of the world. We stopped at Tantalus Lookout on Highway 99 where only the outlines of the peaks across Paradise Valley were visible as the sun began to set.

I took this with my Fujifilm X-Pro1 and 1.4/35 Fujinon lens.


Tantalus Lookout
Highway 99, British Columbia

13 August 2021

[url=https://flic.kr/p/2mnRrAi]Tantalus Lookout by Pierre Saget, on Flickr[/URL]
 
Nikon FM2n, AI Nikkor 50mm f/1.8S, Kentmere Pan 400, developed in LegacyPro L110 at 1:31 for 5.5 minutes. Three individual black and white frames shot through Tiffen #25 Red, #58 Green, and #47 Blue filters, respectively, then combined using GIMP to create a trichrome color image.


2021.05.15 Roll #276-06160-positive-trichrome.jpg by dourbalistar, on Flickr
 
dourbalistar said:
Nikon FM2n, AI Nikkor 50mm f/1.8S, Kentmere Pan 400, developed in LegacyPro L110 at 1:31 for 5.5 minutes. Three individual black and white frames shot through Tiffen #25 Red, #58 Green, and #47 Blue filters, respectively, then combined using GIMP to create a trichrome color image.
Click to expand...

Wow, interesting effect in the fog. I suspect that is because of the fog movement and uneven exposures between all three filters?
 
cjm said:
Wow, interesting effect in the fog. I suspect that is because of the fog movement and uneven exposures between all three filters?
Click to expand...

Thanks, Chris! Yeah, the bank of fog was rolling down the ridge into the valley (eventually overtaking and enveloping us), so the iridescent colors are because of fog movement. I believe the effect is called the Harris Shutter Effect. I don't think the rainbow fog effect is because of uneven exposures, since the colors in the (static) bottom half of the frame are "normal".

In any case, for trichromy exposures, I usually meter the scene and then apply the filter factors for the respective color filters I'm using. The Tiffen filters I'm using have filter factors of 8x (+3 stops), 6x (+2.6 stops), and 5x (+2.3 stops) for red, green, and blue respectively. Since my camera and lens only have full stops, I take an unfiltered meter reading, and then adjust the shutter speeds +3, +2, and +2 for the filtered exposures.
 
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