Quote:
Originally Posted by wasyoungonce
Hi Pat, usually a couple of things cause this but foremost is not matching darks to lights at same temperature.
Also over-stretching and I can see bad (aka hot) pixel trailing but over all it's not a bad result particularly good response to spiral arms Ha.
Try better matching of darks to lights temperature wise and dithering image subs (Dark library avail here, post #4710249). Temps of sensor can vary wildly from start of imaging to finish and darks can also vary the same. Dithering will help the bad pixel trailing and improve S/N. |
thanks brendan i actually had no darks to add to the images so they are all lights......... i can probably see how important they are now
i think because we have such limited number of nights actually imaging i get too excited and snap away like a mad scientist until i drop ha ha!
it has actually taken some serious discipline to concentrate on a single object for a couple of hours
i suppose it may be better for me to take an internal dark with every light...... but it takes soooooooo long!
pat