Helix for 21-CR2.s done in "ImagesPLus" with a Baader UV-IR Cut-Off 2in. filter thru a TeleVue .8XRedcr/Fltnr for 950mmF/L with a Canon EOS Rebel T7i modified by Hutech thru a 152mm A+M Refractor(OfficinaStellare) for a majority of 195secISO1600 images Two images were 300secISO1600 which makes the image a little bright ...so .. about 200secISO1600 works OK .x
yes.. I was 'guiding' with MaximDL Pro V6.16 ... but the clouds were out from 8:00 to 9:00 pm that night .. so after that I used Matar for a 'Live View' focus on it's smallest stars ... but Enif has smaller stars but it was high at the Meridian so I couldn't use it . When small stars are in focus , the bigger stars seem to be slightly oval sometimes .x The next time I might try the Baader Sulfur II for long exposures and some with 'Noise Reduction ON' to see if the sulfur 'eyebrow' area shows using various long and short exposures . I was going to use the Baader UV-IR with the Minus-Violet filters but it wouldn't thread onto the 2in. Minus Violet so I just used the Baader . With the Minus-Violet filters I could see the small stars with 'Live View' on Enif ... so I figure if they show I can get content from an 'object' . Skat and Fomulaut don't have any small stars and the 'Live View' focus is a quick way to be in focus .x The Bubble Nebula here with a Baader SII filter which shows some content for a 9minand 200secISO6400 stacked image.
