Maximize Moon Illusion - and moon's velocity in photographs Sept 17, 2018 22:55:56 GMT
Post by Peterj on Sept 17, 2018 22:55:56 GMT
I'm not suggesting that you create composite images blended in post processing and exaggerate the moon's size. My intent is to explore how to use this illusion rather than scientifically explain it; for interested parties here’s a scientific see sentence below below covering a multitude of explanations [btw there's no single accepted explanation]. My simple "explanation" is the moon appears larger when viewed close to horizon than directly overhead.
I think I need a training session on how to create links on this site the document link should be www.uww.edu/Documents/colleges/cls/Departments/Psychology/Mccread_Moon_Illusions.pdf
Wait a minute – what about all those images showing the partially risen moon looking absolutely huge? What’s happening here is the belief in the illusion and actually capturing an image showing the illusion – no not necessarily post processed but an actual image. Have a look at this image and read the relatively simple explanation.
This table top demonstration uses every day items captured at different focal lengths of my zoom lens. All images are hand held and at longer focal lengths are not be perfectly focused. The camera was moved in relation to the objects in order keep the larger object about the same size in the frame.
While researching Moon Illusion for the Lunar Eclipse on 1/20/2019 the moon's velocity information was highlighted a few times. When capturing moon images one must be aware of the moon’s relative velocity to the earth.
The camera was tripod mounted, manual mode, ISO 100, f8, 1/60 sec, AWB, lens extended to maximum [600 mm], moon framed, time lapse set to start when the shutter was pressed, 30 second interval between exposures, sequence terminated when the moon was about to leave the frame.
The image is an 11 second composite [22 layers] created using On1 Layers Module blending mode for the top 21 images set to lighten. No adjustments made to any of the layers. The take away here is a high ISO is required because the moon is moving FAST across the sky. The noise resulting from high ISO can be negated by taking multiple images and stacking them together in post and using noise stacking in Photoshop. Most noise is random and will cancel out using this method. I checked the camera to insure the sequence was being captured hence the missing image.