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St Chatherine's Chapel ("The Chapel on the Rock") near Estes Park, CO.
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It really is the humidity. I can endure high 90s if the humidity is down, but today it's only 81 but the humidity is so bad that you just sweat standing there. And to add insult to injury, it's often buggy on those days too!
Quite true (the humidity). In the interior of Alaska the air usually is dry during the summers and winters, but during the summer the temperature can reach nearly 90-degrees F. with a high moisture content in the air every now and then (profuse sweating then). This summer the temperatures have reached 80-90 degrees (F.) during the day, and then can be in the 50's at night.

Moisture in the air during the cold winters turns into "ice fog" (frozen moisture), which in turn decreases visibility and makes driving difficult.
 
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Quite true (the humidity). In the interior of Alaska the air usually is dry during the summers and winters, but during the summer the temperature can reach nearly 90-degrees F. with a high moisture content in the air (profuse sweating then). Moisture in the air during the cold winters turns into "ice fog" (frozen moisture), which in turn decreases visibility and makes driving difficult.
I've also heard that "humid cold" is much worse than "dry cold." I can say some days where it's humid and in the 30s, it feels like the cold just goes right through your clothes, but on a dry day even the single digits doesn't have the same feel.
 
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this is a gray hairstreak, which is apparently rather common, but i'd never seen one before to my recollection. nikon z6ii + nikon 105 macro, ISO 800, f/5.6, 1/500 + two images stacked
They are quite easy to overlook, especially due to their love of clover. They easily disappear into the background. It's been my experience that they are some of the first butterflies to show up in the season, short of the white and yellow ones. Shouldn't be long after before you start seeing monarchs and swallowtails.
 
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I've also heard that "humid cold" is much worse than "dry cold." I can say some days where it's humid and in the 30s, it feels like the cold just goes right through your clothes, but on a dry day even the single digits doesn't have the same feel.
Yes, when the air is extremely cold but dry, it doesn't feel as cold. However, this condition can be very deceiving and can lead to frostbite. The worst happens if there is a breeze or wind.
 
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[Edit: Shooting fish in an indoor aquarium setting is challenging, largely because the light is less than ideal. A fast lens is pretty much a requirement (i.e. f/2.8 at the minimum, though f/2, f/1.8, or f/1.4 are preferred). The other thing I have learned over time is to shoot with a fast shutter speed if you want to avoid motion blur from the fish swimming by. I usually shoot in aperture priority, but for indoor aquarium pics I now switch over to shutter priority and set a fast shutter speed (in this case 1/1000th sec). This caused the ISO to go up to 3200 which introduced some noise, but it isn't excessive. I would encourage people to consider shutter priority mode in this shooting scenario. Not sure 1/1000th sec is optimal--might be able to avoid blur from subject motion at a slightly slower shutter speed. Also might need a faster shutter speed, depending on the subject. Let the ISO go where it will and hope you have a sensor that can deal with the noise from higher ISO values in an acceptable way. For me, better to have a "sharp" subject with noise compared to a blurred subject with less noise.]
 
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[Edit] My post made someone angry and that wasn't my intention, especially given all of the joking that goes back and forth around cat pictures. Oh well.
 
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