Posts Made By: Jason Boyce

Thanks Guy's

I was pretty suprised this came out as good as it did with the poor transperancy,I am having a good time with the Ha filter.


Jason

Nice job on this Jim it looks good!

You are really working through the Sharpless objects.


Jason

Hi Gilles,
Sweet image!
I just took a stroll through the full size version,you did an excellent job bringing out the detail in the main nebula and retaining the very faint outlying nebulosity surrounding it.

Really quite nice

Jason

Great shot Greg 8O


Jason

Very cool!
That is a great FOV,really shows off that busy part of the sky.

If Eta Carina blows,your in for quite a treat



Jason

Heres a bit brighter version with a bit more saturation,


Does it look like an improvement?


Jason

Great write up and super comparisons Dietmar.

My feelings are OSC and Mono both have place and need not really be competitors.The biggest drawback I see with a OSC is if you want to shoot narrowband you really lose resolution because of the fact you need to bin.

I think this is probably why a larger percentage of imagers choose a mono cam,more versatility.I know this is the reason I switched to a mono after starting out with a OSC.If I could afford to keep around both I would

I personally do not find processing the mono camera images any more difficult than than the OSC.Keeping in mind I was very inexperienced when I owned the OSC.

I am currently on my 4th 8O CCD camera,I chose this time to go with a NABG SBIG ST10xme.After a couple years of experience I decided for my local conditions I wanted a sensitive,high well, camera to get as much signal as possible.
I think I chose wisely this time,though it would be nice to have a little bigger chip

So,I would agree it is important to match your equipment to your local conditions to get the most out of either type of camera.

SBIG cameras are for sure more noisy than the SX cameras and good calibration is essential to get a good final result.For a beginning imager this can seem mysterious(it did to me)and it took me a bit to learn good calibration routines but I think anyone who has been imaging for awhile will tell you it really is not that painful to take a set of darks on a cloudy night and the bias frames only take a few minutes.

With a high quality master dark made up of say 20-30 dark frames at the longest exposure time you typically shoot,at the temperature you usually shoot along with a high quality master bias you can scale the darks for whatever exposure you may take.
This way there is no need for many different exposure length master dark frames.
This is how I have been calibrating for several months now along with my flats and it works great.
Anything left after the dark subtraction gets taken care of on the data reject and the combine.
I will probably use my masters for 3-5 months,it will just depend on how much the chip changes.I of course take new darks for summer use when I run the camera at -20.
I really don't feel this amount of "extra" imaging time will harm the camera at all.

Do I wish I didn't need to take any darks? You bet!Who wouldn't
With my particular camera it is necessary,it just isn't that difficult.

I agree with most of your findings and sure would not argue with the excellent results you and others obtain with your SX cameras,OSC are without question very capable.

I think the moral is just like telescopes,there is no perfect camera for every situation or object one wants to shoot.With the many choices available today everyone is sure to find something that suits them whether it be a OSC or a mono.

Thanks for posting your thoughts and comparisons,

Merry Christmas and Happy new Year!

Jason

Sweet image David

I bet it just gulps up the photons!

Jason

Hi Alex,

I think the closer you keep it to the scope the closer you will be to getting the full 0.63x time reduction.Keep in mind you also need to keep the distance from the reducer to the camera in mind too for good results.

I have not used that reducer so I don't know what the spec is.

What kind of focuser are you using?


Jason

Hi Paul,

Your a brave man taking 10 minute subs of m45 with an ST10 8O

Looks like the debloomer worked well though.You have some good Lum data there,a great start.
A flat would surely help help this one.

Jason