M31 Image

Recent weather almost stops play. Had another go at processing M31
(apologies to Mr Geake). 74 x 30s exposures 300mm focal length @ F/5.6 with
Canon 350D, ISO1600.

This one used minor colour adjustment (350D has a blue bias), DDP, Noise
removal, background smoothing, wavelet and high pass selective sharpening on
the dark lanes with PSP.

I'll try this again at ISO800 sometime and try dark frame subtraction as the
image is still a little noisy - If the camera comes back from repairs..
Tearing the IR filter out met with disaster :-((

http://homepage.ntlworld.com/taylor_...31_resize2.jpg

Regards


Chris

"Chris Taylor" wrote in message
...

Recent weather almost stops play. Had another go at processing M31
(apologies to Mr Geake). 74 x 30s exposures 300mm focal length @ F/5.6 with
Canon 350D, ISO1600.

This one used minor colour adjustment (350D has a blue bias), DDP, Noise
removal, background smoothing, wavelet and high pass selective sharpening on
the dark lanes with PSP.

I'll try this again at ISO800 sometime and try dark frame subtraction as the
image is still a little noisy - If the camera comes back from repairs..
Tearing the IR filter out met with disaster :-((

what happened chris?
--
Martijn (astro-at-pff-software.nl)
10" LX200GPS-SMT
ETX105
www.xs4all.nl/~martlian

"md" not given to avoid spam wrote in message
...
I'll try this again at ISO800 sometime and try dark frame subtraction as
the
image is still a little noisy - If the camera comes back from repairs..
Tearing the IR filter out met with disaster :-((

what happened chris?
--

The Canon has very little response in the H-Alpha region. I dismantled the
camera and replaced the IR filter with clear glass. This bit went OK. While
replacing the ribbon cables I damaged one of them. Imagine selotape embedded
with copper conductor/wires. That's what the ribbon cables are like. Trying
to re-install them is a really tricky bit of work as they bend alot and
appear quite fragile. The camera powered up but repeatedly tried to take
pictures. On inspection one of the ribbon cables appeared to have a severed
conductor. Rather than make matters worse by trying to strip the camera
further I sent it in for repair. I should be contacted with a price over the
next couple of days.

Regards (tot siens)


Chris

"Chris Taylor" wrote in message
news

"md" not given to avoid spam wrote in message
...
I'll try this again at ISO800 sometime and try dark frame subtraction as
the
image is still a little noisy - If the camera comes back from repairs..
Tearing the IR filter out met with disaster :-((

what happened chris?
--

The Canon has very little response in the H-Alpha region. I dismantled the
camera and replaced the IR filter with clear glass. This bit went OK. While
replacing the ribbon cables I damaged one of them. Imagine selotape embedded
with copper conductor/wires. That's what the ribbon cables are like. Trying
to re-install them is a really tricky bit of work as they bend alot and
appear quite fragile. The camera powered up but repeatedly tried to take
pictures. On inspection one of the ribbon cables appeared to have a severed
conductor. Rather than make matters worse by trying to strip the camera
further I sent it in for repair. I should be contacted with a price over the
next couple of days.

I have been thinking about thie IR filter, but as I want to use the camera for daytime
photography as well, I think I will not touch it.

Regards (tot siens)

that should be "tot ziens" Chris
--
Martijn (astro-at-pff-software.nl)
10" LX200GPS-SMT
ETX105
www.xs4all.nl/~martlian

"md" not given to avoid spam wrote in message
...
(tot siens)

that should be "tot ziens" Chris

Aha, tot ziens in Nederland. Tot siens in Afrikaans. Ek kom van Suid Afrika
af. Ek is Engels sprekend maar kan ook Afrikaans praat. Ek het vir so lank
in Engeland gebly dat ek vergeet ook Afrikaans en kry net die kans om die
taal te oefen.

Tot Ziens


Chris