Jump to content

Narrowband

A quick M27, The Dumbbell Nebula.


Taman

Recommended Posts

Taken on Monday. The sky was washed out by the nearly full moon, so I wasn't expecting to get anything at all.

This actually took longer to process than taking the images, so  I'm amazed how much I got for just 80 minutes exposure time. 

20 x 240s, with darks, flats and dark flats.

Taken at f6.3 with the ASI294MC Pro (temp -12C, gain 126) and Optolong L-Pro filter.

 

m27.jpg

  • Like 13
Link to comment
Share on other sites

You have some fine filamentary detail in there.   Really nice considering the full Moon.

Optolong seem to produce some good filters.  I have the L-enhance and it certainly has opened up possibilities for my old QHY8pro  OSC.

Sean.

  • Thanks 1
Link to comment
Share on other sites

1 hour ago, Craney said:

You have some fine filamentary detail in there.   Really nice considering the full Moon.

Optolong seem to produce some good filters.  I have the L-enhance and it certainly has opened up possibilities for my old QHY8pro  OSC.

Sean.

Thanks Sean.

The Optolong has really improved my images. I always said I would never use a light pollution filter, but this is staying on permanently! 😀

Tony.

Edited by Taman
Link to comment
Share on other sites

10 minutes ago, MarkAR said:

Excellent image, some really nice detail showing.

Thanks MarkAR. 

I'm now wondering what 3 or 4 hours worth in a dark sky would look like. I may have another go later in the year.

Tony.

Edited by Taman
  • Like 1
Link to comment
Share on other sites

Well I know you get slightly longer nights down there in Jersey but with a full moon and a lack of astronomical darkness you've done exceptionally well.

For me the background is a tad too dark - maybe that's the compromise for shooting in those conditions - but it is still an outstanding result all things considered.

Well done!

  • Like 1
Link to comment
Share on other sites

2 hours ago, x6gas said:

Well I know you get slightly longer nights down there in Jersey but with a full moon and a lack of astronomical darkness you've done exceptionally well.

For me the background is a tad too dark - maybe that's the compromise for shooting in those conditions - but it is still an outstanding result all things considered.

Well done!

Thanks for the comments. Yes, conditions are a bit strange at the moment. I did wonder whether it was worth opening the observatory especially as I don't shoot narrowband.

You're not the only one who has mentioned dark backgrounds in my images. I generally set the black point levels to 20 in Photoshop, perhaps they should be higher? 

Tony.

Edited by Taman
  • Like 1
Link to comment
Share on other sites

6 minutes ago, Taman said:

You're not the only one who has mentioned dark backgrounds in my images. I generally set the black point levels to 20 in Photoshop, perhaps they should be higher? 

Tony.

Hmmm.  Well many of the really top-notch deep sky imagers would recommend 23/23/23 - I recall first seeing Olly Penrice recommend that and in my view what he doesn't know about imaging isn't worth knowing - and Steve Richards recommends the same.  But I'm surprised that 20 looks so dark to my eye (that said I have just started calibrating my monitors and it does make things darker generally...)  I personally tend to leave mine a bit lighter still - somewhere between 25 and 27 often - but if you're happy then leave it where it is.  Your image, your rules after all!

  • Like 1
Link to comment
Share on other sites

2 hours ago, x6gas said:

Hmmm.  Well many of the really top-notch deep sky imagers would recommend 23/23/23 - I recall first seeing Olly Penrice recommend that and in my view what he doesn't know about imaging isn't worth knowing - and Steve Richards recommends the same.  But I'm surprised that 20 looks so dark to my eye (that said I have just started calibrating my monitors and it does make things darker generally...)  I personally tend to leave mine a bit lighter still - somewhere between 25 and 27 often - but if you're happy then leave it where it is.  Your image, your rules after all!

Thanks for the info x6gas, I'll give the magic number 23 a go! 😀 

Shame that Photoshop (CS6) no longer includes the screen calibration utility, but I've just found out how to do it in Windows 10.

You're right, the background is a bit dark!

Tony.

Edited by Taman
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.