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Sketches and Studies by Craig Houghton » plants

Archive for the 'plants' Category

Some photos from Edgerton Park in New Haven

Craig Houghton April 24th, 2008

I am only a couple of rolls into this film thing, but I am loving my minty new minolta.

All taken with Fuji Reala 100.

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Thanks for looking!

Infrared photos with my Sony DSC-H1 and an Opteka IR filter

Craig Houghton September 7th, 2007

I’ve been meaning to post about this, but I’ve been ill. I find the nearly visible endlessly fascinating, so I’m sure I’ll return to this topic soon.

Near-infrared light is just beyond visible red light. With wavelengths of 780nm and up, it’s a spectrum we’re just not built to see. Well, there is a bit of an overlap, but the visible light around us overpowers the narrow band we can see without technological assistance. Near-infrared is the channel-changing bright light your remote control shines at your tv box. Take a look. If you can’t see the light when button-mashing (and, you shouldn’t be able to), look at it through your digital camera viewfinder. Note that this isn’t heat-based thermal vision and it isn’t infrared boosting night-vision, but it’s very cool.

See the links below for more on this, but the short story is that most digital cameras have a filter to block infrared light. They’re not out to spoil your fun — it helps to improve your pictures. However, it’s often a weak filter that still lets through some infrared light. However, whatever filter is there still acts like a pair of infrared-blocking sun-glasses, so you’ll have to use a looong manual shutter speed or set your camera to nightshot.

Learn more:

Infrared goggles ($10)- milk that narrow band of near-infrared that we can actually see (yes. they work.)

same idea with less talk, more pictures

use old film/exposed negatives to make an IR filter - that works, but the $30 dollar filter I bought for my digital camera worked far better. try the home-made filter method if you can’t buy a real IR filter for your camera. there are some tutorials out there (and there are many) that use floppy disks instead of exposed negatives. the floppies I used just wasted my time and made everything rather dark and smoky

remove the internal IR filter to increase sensitivity - most digital cameras (and probably webcams too) will do just fine with their internal filter intact, so I wouldn’t reach for that screwdriver yet

As for me, I’m very happy with my purchase of an Opteka 58mm 720nm Infrared Filterfor my Sony DSC-H1 digital camera. I’m sure there are other more IR sensitive cameras out there, because I have to keep the camera shutter open quite a while to let in enough IR light for a decent picture. This usually means about 2 seconds of exposure (auto white balance with manual shutter of 2 seconds). Of course, I have to use a tripod at that setting. And, (assuming you’ve been doing some reading elsewhere) no I haven’t seen clothing turn to Saran wrap. Then again, I haven’t really tried, wouldn’t recommend it, and doubt that someone, sun-bathers aside, could hold perfectly still for the required 2-4 seconds. Here’s what I have seen of the ‘invisible’ and beautiful world of near-infrared.

(all photos here taken with my sony dsc-h1 and opteka ir filter)

the photos often look best when tweaked to grayscale. before adjusting, you can get some funky colors
http://leversandpulleys.com/artblog/wp-content/uploads/2007/09/backyard_small.jpg

chlorophyll, like in these normally dark leaves, shows up as a strong white in near-infrared
http://leversandpulleys.com/artblog/wp-content/uploads/2007/09/ir_hops_small.jpg

it’s hard to read this photo, but the tree in the center here is a purple plum. the leaves are very, very dark, but they’re white when using a near-infrared filter. the sky also turns dark unless it’s overcast. barely visible clouds and rainbows are easier to see as well.
http://leversandpulleys.com/artblog/wp-content/uploads/2007/09/plum_small.jpg

in near-infrared, a clear sky can be dark like this without after-tweaking
http://leversandpulleys.com/artblog/wp-content/uploads/2007/09/dark_sky_small.JPG

infrared in grayscale (at top) versus visible light in grayscale (below)
http://leversandpulleys.com/artblog/wp-content/uploads/2007/09/ir_vs_visible.JPG

the dark plum looks almost like a negative, but it’s not. here’s the visible (bottom) full color along with what an actual negative would look like (at top) just as a reminder. notice that it’s quite different from the infrared atop the first pair.
http://leversandpulleys.com/artblog/wp-content/uploads/2007/09/plum_negative_and_color.JPG

Also, I really do recommend the $10 goggles (cost a bit more with mail-order parts). When the light is strong (noon till 3 or so on a bright day), it’s a world of pink and white leaves, dark networks of branches, and black skies. We only see a narrow band, but I know it’s the real thing as the plum tree turns a white I could never get with normally-visible light interfering.

Some Photos from Riverbound Farm

Craig Houghton July 22nd, 2007

Over at the Cheshire Town Post I uploaded some photos of flowers and bees and such from the Riverbound Farm bird sanctuary in Cheshire.

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Here’s one from home that didn’t fit in that post.

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Photos by Craig Houghton.

Don’t Water the Dandelions

Craig Houghton June 11th, 2007

Water em’. They’re thirsty!

http://leversandpulleys.com/artblog/wp-content/uploads/2007/07/sunshower.jpg

Berberis thunbergii, Japanese Barberry

Craig Houghton February 20th, 2007

Here’s Berberis thunbergii before the last of the berries fall off and spring begins. There’s one growing in my front yard. It’s considered an invasive exotic species. I have no idea how the berries manage to stay attached all winter, but they take quite a bit of wear before they lose their shine, dry up, darken, and fall.

8×24 acrylic
http://leversandpulleys.com/artblog/wp-content/uploads/2007/05/branch_combined_small.jpg

detail

lone berry

-Craig

Testing Colored Pencil w/ a Wash of Alcohol

Craig Houghton February 14th, 2007

Last night I watched the Carlos Huante Gnomon Creature Sketching and Design Video. He demonstrated a drawing technique that included colored pencil, marker paper, and rubbing alcohol. Once he had the basic forms down with some selective detail and value, he splashed alcohol on a cotton square and rubbed out the work. He then lifted out the lights with an electric eraser and reapplied the darks. From there he used the mid-tone to help him carve out a creature. I tried out essentially the same technique, but I did make use of a white colored pencil as neeeded.

I apologize for the marker tree there. This started out on my scrap page of marker paper — I didn’t expect to go anywhere with it, but the technique felt comfortable enough to keep me going. I didn’t expect the colored pencil to be so forgiving (in terms of getting things initially hammered out), but when you wash out the light lines using the alcohol, it cleans it right up.

colored pencil alcohol wash

-Craig

Lunchtime Trees

Craig Houghton February 7th, 2007

I started a new toned fabriano sketchbook today. Here’s an edge of the woods sketch from during lunch today.

lunch-trees

Thanks for looking

Shroom Shapes

Craig Houghton January 27th, 2007

just playing around with some fungal shapes this evening..

http://leversandpulleys.com/artblog/wp-content/uploads/2007/05/shrooms.JPG

-Craig