hello members.......... i must admit i am as happy as a dog with two willies!
33 lights
120s
iso 1000
60da
f6.3
guided
stacked in dss but cropped in PS (never done this before)
pat
thanks a lot guys
cant get longer subs lee too much LP and it is m83 (i was just trying to be a smarty)
last night i put this into PS and reduced the brightness and increased the contrast and it looks much better than this now
i will have to seriously look at the PS thingy a lot more closely
pat
Pat great job by the way, the 60Da gets the pockets of HA in the galaxy really well.
For the LP have you thought about an Astronomic CLS-CCD filter? For a camera that is sensitive to HA this should give good colour balance (well recoverable anyway) and you can then push the subs a lot longer.
Here is an image I took of the rose nebula for 300 second subs with this filter and I live 10 Kms from the Brisbane CBD.
I will have to redo this with my Central DS Camera.
Pat great job by the way, the 60Da gets the pockets of HA in the galaxy really well.
For the LP have you thought about an Astronomic CLS-CCD filter? For a camera that is sensitive to HA this should give good colour balance (well recoverable anyway) and you can then push the subs a lot longer.
Here is an image I took of the rose nebula for 300 second subs with this filter and I live 10 Kms from the Brisbane CBD.
I will have to redo this with my Central DS Camera.
Cheers
ooh anthony that is very nice!
i have the idas lps p2, but i would not know the differences between them to be honest mate
i tried the rosette a few weeks ago but i ended up disappointed because there did not seem to be much HA response at all in the 60da
i attempted a week or so ago to buy a narrowband ha filter here on iis but i missed out by a few minutes i think
do you think the filter you mentioned would be better than the one i already have?
pat
I am no expert but the CLS-CCD filter does a great job on the modded camera IMHO, however when I used this with my standard EOS600D it was terrible as almost no red spectrum seemed to get to the chip.
The attached picture is the spectrum details for the CLS-CCD filter so all I could suggest is to compare the two filters based on these details and see what passes more light in the ranges you are after (e.g. HA).
But as I said I am no expert so please do your homework.
i didnt ask for permission but i did run your image through Pixinsight to remove the background gradient. if you wish it to be removed i will comply.
what a lovely shot you have there. like the structure, but given i was working with a 55kb file i think it shows that you certainly have promise in the data
david........ thats not my picture surely!
i had no idea (if this is not a cruel joke) how was that done david please?
at the mo i am only able to try and get the sky "dark" in dss and i just discovered yesterday in PS - layer > brightness / contrast, never mind the darks and flats
interstingly i did try some flats (white t-shirt job?) and at my f6.3 still had "dark corners"
lots to learn.... but thanks david for pointing out whats possible.... its three willie time now ha ha!
pat
by the way david what the hell is that first pic? it is nothingness, and what has it got to do with my picture i posted?
pat
PAt,
welcome to the world of Pixinsight - the first image was the gradient removed from your image, the second - the left over bits
Do yourself a favour, download Pixinsight as a trial, download and watch all of Harry's videos, then stack your stuff in DSS and then save your results as a FIT file - take that into Pixinsight - from there the processess seem quite complex but it will just be a matter of getting used to some new software. by the time you crash and burn several times it will help you learn how to process an image. in theend you can get a great result, then if you wish tweak it in photoshop - though you dont need to 90% of the time
This was my lowly attempt at M83 through a 5" refractor the other night, trialling my new CCD. This is an unprocessed (apart from cropping) image, with no darks, flats, or bias subtractions, and is 3 light frames in total for 20 minutes on target (2 x 5, 1 x 10) - the SX cameras generally don't need dark frame subtraction (I have since put it in photoshop, and had to do 1 median filter pass to remove selected GREEN pixels - no red or bue to speak of).
M83 is a WONDERFUL target, one of my favourites. My only problem is until about 12am lately, it is RIGHT over a bloody streetlight! (Centaurus A is MUCH worse for me until MUCH later)
Still a touch purple, but that's all the darned light pollution from a combination of Hg vapour and incandescent bulbs, plus a neighbours annoying outside fluoro they insist on leaving on regardless.
Nice for such a short collection - increasing your subs should really make it pop out... It's M83 season, I just got my new CCD today, M83 will be the first galaxy I point her at I'd say.... just need to wait for the moon to go now.....
