barred owl, where we see talons ~ digital examples, with technical info

barred owl ~ where we can see talons ~ digital examples, with some technical specs:

Jan. 3rd 2004, almost 3 pm, some light over the ridge onto the tree top ~

the original was 1/250th SEC f/6.3 ISO = 200

"pattern"metering mode daylight white balance with an 81a filter no flash

Canon Rebel digital camera, Tamron lens zoomed out to 300 mm (+plus digital fudge factor)

the whole picture ~ from this angle we sometimes see claws fully zoomed lenses will magnify camera shake

original was saved in the camera as a JPEG at 3072 by 2048 pixels at 180 ppi resolution file size 2.79 M

if that were printed as-is, it would be image size 17" by 11.3" and image in monitor display takes up >18 Meg

NOTE that this example, representing the whole original, is already adjusted for brightness &c, and remade as a JPEG,

so this file is 750 by 500 pixels, at 96 ppi, a file size like 77.7 K

(giving approx. 7.8" by 5.2" and consuming just over 1 M when displayed at 1 to 1)

( a longer telephoto lens, probably needing a tripod also,

would produce a better composed image ... )

cropped to the more useful part of the image:

(where it's easier to see the two claws and one toe)

makes a new image size of 1050 by 1400 pixels,

at 180 ppi

for a file size about 8.4 M

(giving about 5.8" by 7.8", about 4.2 M on screen)

NOTE this demo image was also sharpened &c, and remade

to 450 by 600 pixels, at 96 ppi,

a file size about 86.1 K

(giving aout 4.7" by 6.25", about 791 K on screen)

At this point, cropping very close-up,

(this version is also further adjusted for what

clarity and correction I could still have)

but I could not do much more because

all remaining pixels are already at

about this resolution ...

we retain 420 by 420 pixels, at 180 ppi

This image adjusted and remade for a web page is

420 pixels square at 96 ppi , file size 71.5 K

It's approx. the best I get with this equipment,

hand held against a tree at this angle & distance,

for clarity of claws, toes and feathers, without

finally just degrading the image.

Over time, I remake my owl photos at the

three angles around this tree, so by now I will

have at least several more examples of the more

focused shots to choose from ~ such as:

other examples, where we can see claws,

cropped and adjusted and re-JPEGed ...

from a photo made Christmas Eve's Day 2003 ...

125th sec , f/8 , ISO = 200

everything else the same except with a red enhancer filter

and this one had an exposure compensation of -0.3 stops ... from a photo made New Year's Eve's Day 2003 ...

1/400th sec , f/6.3 , ISO = 400

either red enhancer filter or, likely an 81a filter

both these representations also cropped, enhanced, JPEGed

Obviously I can barely crop

to enlarge any more ~ plus

this image is also further

false-sharpened as much as

these remains would allow.

go to the WIZZBANG version page

go to Gregour's Winternet pages