Nebulae and Galaxies. I don't understand. - Page 2

ballaratdragons (Ken) · #21 09-02-2005, 10:36 PM

Quote:

Originally posted by ballaratdragons

Our eyes receive light at a certain speed (like a camera shutter) but our eyes are not fast enough to see the colour of deep space light unless you go very big aperture.

Quote:

Originally posted by RAJAH235
The main reason that you can't see colour, is because your eyes/brain process the info. instantly.(not like film which accumulates the light). savvy? Unless, as has been said, you have a BIG t'scope.
(cones = colour----rods = movement/B&W).

See, I was right!

Sort of

RAJAH235 · #22 09-02-2005, 11:28 PM

Hi Ken, I read a text book related to eye surgery, a few years ago. Boy, some of the pics. were awfully vivid.

ballaratdragons (Ken) · #23 09-02-2005, 11:33 PM

Cool!

We will have to distribute that book to all the members and call this forum 'EyesInSpace'

seeker372011 (Narayan) · #24 09-02-2005, 11:37 PM

Quote:

Originally posted by ballaratdragons
call this forum 'EyesInSpace'

LOL

RAJAH235 · #25 10-02-2005, 04:12 AM

Hi Guys,
Ken, You're just too damn quick for me!!!!!!!!!

Jimmy · #26 10-02-2005, 09:48 AM

ok.... so to answer my question.... If I use a red filter I will see a 'falsely red looking' nebula because my eyes will only detect the red wavelengths which are filtered through the glass.

correct?

same with green, blue etc.

so it will look like a red nebula anyway.
thats good, because now I can show my wife the pretty colours.............. lol

RAJAH235 · #27 10-02-2005, 10:03 PM

Hi Jimmy, You'll find that by using a coloured filter, the image will be a lot fainter than if you viewed it without.(any tinges of real colour will be killed). This is because you are cutting out the bandwidths of light needed to see the whole object. It's like looking thru a dirty window. A broadband/UHC/or OIII will enhance the image by filtering out the background radiated light that dims the original un-filtered view. This is why you pay big money for them.
As stated, borrow before buy, if poss. and keep your coloured filters for the planets.
HTH.
ps. It's all to do with ISOTOPES.(H1/H2/H3 etc etc).

RAJAH235 · #28 10-02-2005, 11:09 PM

Hi Jimmy, The Broadband.

RAJAH235 · #29 10-02-2005, 11:11 PM

Hi Jimmy, The Narrow band.

RAJAH235 · #30 10-02-2005, 11:13 PM

Hi Jimmy, The OIII,

RAJAH235 · #31 10-02-2005, 11:24 PM

Hi Jimmy, I hope that this is not too much info. I just gave you the basic information that is avail. in the MEADE cataldog.

Jimmy · #32 11-02-2005, 10:11 AM

so.... once again.... to answer my actual question, by using a red filter i will see red looking objects? is that correct?

rmcpb (Rob) · #33 11-02-2005, 10:34 AM

Quote:

Originally posted by Jimmy
so.... once again.... to answer my actual question, by using a red filter i will see red looking objects? is that correct?

Yes, they will be red but dimmer and any other genuine colour present will be removed.

Cheers

Jimmy · #34 11-02-2005, 10:49 AM

excellent! thankyou for answering my question! Thanks rob.