|
You want your Luminance data taken during the best possible seeing conditions, so I'll be taking Lum frames at say 70° minimum altitude through to the meridian, flip the mount then shoot Lum in the West down to about 70°.. RGB data I plan to shoot RGB,RGB,RGB,RGB from say 45°~50° through to 70°, and from 70° back down to 50° ~ 45°
If shooting one target for consecutive nights, I might shoot Lum for 2.5 nights straight from 50° flip the mount at the meridian and shoot lum's back down in the west to about 50°, then on the final night shoot Lum to zenith, then shoot RGB, RGB, RGB from the meridian down to 40° or there abouts...
Colour data is not particularly important.. Well, its important obviously, but the quality of the data is not so much. Ie. A lot of imagers will bin colour exposures 2x2, as the resolution/detail just dont matter. Think of it in art terms, your luminance filter is essentially a fine liner pen. Its great for detail, but its just black and white.. your colour is like a box of crayons... it doesnt have to be detailed.... it just has to be colourful.
I've been looking recently, I've found some stunning images on line that come from hours and hours and hours of luminance images, and 3x5min R, G and B.... Just 45mins total colour exposure for anywhere between 10 and 25 hours of Lum...
A few people I know like to shoot LRGB, LRGB, LRGB all night, as this way you're always guaranteed a colour image at the end of the night. I dare say it would be VERY annoying to get 4 hours of luminance, 3x5 mins through the red filter, 2x5 mins through the green then get swamped by clouds... Something to keep in mind.
|