negative moon

[bkm2304 (Richard Brown)]

Hello solar systemers,
Maybe I have spent too long peering at deep space images trying to see faint objects that aren't there. But I decided to negativise (maybe that's not a word) some recent crater shots. They are taken with the G Star Ex mounted on 22" Newtonian and assisted by a 3x Tele Vue Barlow.

Copperknickers is a stack of about 100 goodish captures taken last year, while the Catharina, Cyrilus and Theophilus group is a single "Snapshot" taken last night using the snapshot facility on the GStar.

Personally, I like the negs; which format do you think is better?

Richard

[Derek Klepp]

Enjoyed the close ups.I often use the negative function for quick snaps of prominences just gives that extra dimension to the detail.With such a large aperture have you tried it on the brighter galaxies?Maybe post a few of them.
Derek

[jjjnettie (Jeanette)]

I love a negative moon.

[bkm2304 (Richard Brown)]

Glad you liked the pics, Derek.

Here are some deep sky objects in negative - I suppose they should be over in deep sky but seeing this is a topic about negative images....
Pics were taken with SBIG STL 11000M on 22" Newtonian, self guided, exposure times between 1 and 5 minutes.

Richard

[bkm2304 (Richard Brown)]

Hi Jeanette,

i took the liberty if negativising your full moonage you snapped the other night.

STUNNING!!!

Richard

[jjjnettie (Jeanette)]

Hey, that turned out pretty nice didn't it.
Thanks.

[mswhin63 (Malcolm)]

Funny, I like a negative moon nice resolution on your images too Richard, I like them so much I placed one I did sometime ago on my website - http://astrelect.com/zc/

Richard

[bkm2304 (Richard Brown)]

Originally Posted by mswhin63

Funny, I like a negative moon nice resolution on your images too Richard, I like them so much I placed one I did sometime ago on my website - http://astrelect.com/zc/

Richard

Yes, Malcolm, nice negative moon on your homepage there. It's a well known psychological phenomenon that makes negative images far easier to see detail in than their positive counterparts. I don't know if anyone has explained the mechanism behind the difference. DOes anyone know if there is such an explanation?

Richard

[mswhin63 (Malcolm)]

I think it is related to higher contrast. Mostly used to pick individual star for science purposes. I know that is how it feels for me, although planetary it is not as easy, just looks nice, so I think it is just an action done.

I know that a few wide-field shots I have done recently have a negative image to identify bright stars amongst a flood of gas or astro dust.

[bkm2304 (Richard Brown)]

Originally Posted by mswhin63

I think it is related to higher contrast.

Yes, sounds right.

[Derek Klepp]

Nice deep sky pics .Seeing people are interested in this next time I image the sun whenever that may be I'll try to get some good negative snaps of the prominences although generally just single frame capture it does allow a quick overview of whats happening

[bkm2304 (Richard Brown)]

Originally Posted by Derek Klepp

Nice deep sky pics .Seeing people are interested in this next time I image the sun whenever that may be I'll try to get some good negative snaps of the prominences although generally just single frame capture it does allow a quick overview of whats happening

Look forward to it ....