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Old 14-02-2012, 08:51 PM
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graham.hobart (Graham stevens)
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migrating to CCD

Just thought I would pick the brains of the people who have gone from DSLR to OSC CCD's. The reason I want to talk about OSC is the fact that my skytime is limited and I want to get every last coloured pixel from the frequently cloudy skies down here in the shadow of Mount Wellington. I would like to know about those who have made the transition, the pitfalls and the "If I had my money again I would" type scenarios.
Just to make it clear as well I am not familiar with Photoshop, though I might be in the future.
I have Star Tools, DSS, and Maxim DL though the latter I am still getting my head around.
The camera would be used on refractors mainly, with the odd sojourn on a Newt 8".
Any advice about MP size, debayering, calibration frames etc as I have looked around and seen a lot of expensive cameras!
I currently have a self modded 450D and a 1000D.
I also own a 314L+ Atik which I am saving for the time when I can do more Ha.
Another question-Anyone recommend a good starter text for PShop?
Am working on getting that sometime this year as well and although I have seen a lot of tute's on line, I am an old fashioned kinda guy who likes to thumb through real books!
Cheers
Graham
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Old 15-02-2012, 08:14 AM
Poita (Peter)
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My advice would be to try nebulosity for the DSO's, for me it made things much easier and did a great job straight out of the box.
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Old 15-02-2012, 05:06 PM
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irwjager (Ivo)
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Quote:
Originally Posted by graham.hobart View Post
Just thought I would pick the brains of the people who have gone from DSLR to OSC CCD's. The reason I want to talk about OSC is the fact that my skytime is limited and I want to get every last coloured pixel from the frequently cloudy skies down here in the shadow of Mount Wellington. I would like to know about those who have made the transition, the pitfalls and the "If I had my money again I would" type scenarios.
Just to make it clear as well I am not familiar with Photoshop, though I might be in the future.
I have Star Tools, DSS, and Maxim DL though the latter I am still getting my head around.
The camera would be used on refractors mainly, with the odd sojourn on a Newt 8".
Any advice about MP size, debayering, calibration frames etc as I have looked around and seen a lot of expensive cameras!
I currently have a self modded 450D and a 1000D.
I also own a 314L+ Atik which I am saving for the time when I can do more Ha.
Another question-Anyone recommend a good starter text for PShop?
Am working on getting that sometime this year as well and although I have seen a lot of tute's on line, I am an old fashioned kinda guy who likes to thumb through real books!
Cheers
Graham
Hi Graham,

Honestly, my advice would be to master what you got before throwing money at further upgrades. You have a very capable setup already, with heaps of potential.
It can take a while to master all apsects of imaging. The need to master these aspects will not disappear when buying a CCD. Sure you will acquire more photons quicker and with less noise, but if you're still struggling with consistently nailing your focus, framing, and processing, a switch from a DSLR to an OSC CCD won't yield that much of an improvement.
As for software, for processing astronomical images, I would stay away from PhotoShop. PS is a great piece of software for generic photo use, but addresses very few AP-specific problems without having to invest into additional plug-ins. Your money would be better spent on an AP-specific package like PixInsight, AstroArt, AIP4WIN, etc.
A lot of people here on IIS use PS, because that's what they are used to, coming from other backgrounds of photography. Others got into AP, way before dedicated software was available. Yet others prefer it because they like to be in control and know precisely what they are doing.
People may disagree with me, but getting into PS in this day and age purely for AP is, IMHO, a waste of money and time. We are spoilt for choice with far better and cheaper (AP dedicated) alternatives.
Nebulosity, while a great capturing tool, is somewhat limited in the processing department compared to the software you already have. Between ST and Maxim DL you already have all you need - you could even toss ST aside and make due with Maxim DL if you're so inclined.

Cheers,
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Old 15-02-2012, 07:39 PM
Poita (Peter)
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If you are struggling with Maxim, then I'd try nebulosity until you get your head around things, I use Maxim DL myself, but got there via Nebulosity, hence the advice.
I would also recommend sticking with your modified DSLR for a while.
I personally love the QHY8 OSC camera, as it has effectively ZERO noise and just works effortlessly (once you get the drivers sorted).
I know in theory you get better results with filters etc. but you have to be willing to collect a lot more data, and one thing that is overlooked is that with an OSC, if you capture a total of (for example) 3 hours of data, you have captured 3 hours of Red, 3 of green, 3 of blue etc. albeit at a lower resolution.
In that same time you could only get 1 hour of Red, 1 of Green and 1 of Blue, albeit at higher resolution. So it isn't as clear cut as it seems when looking at how much data you have gathered with Mono vs Colour.

I know with the planetary cams, I don't get much difference at all on the planets with a DMK vs DBK capture on the same gear.

Mono is better resolution, but it is more capturing, more focusing, more processing and more gear. If you enjoy that, then go for it, you will eventually get better results and more control, but you can capture absolutely stunning images with even a basic QHY8 OSC or similar, have zero noise floor and less work to do

Now everyone jump in and flame away
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Old 16-02-2012, 12:33 AM
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midnight (Darrin)
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Graham,

I have many times thought of exactly the same way as you do thinking I've hit my limits with my DSLR.

However, (and it's a big however), I am now convinced my post processing skills are still basic and there is so much potential with my existing SLR setup. For that reason, I have not chosen to go CCD until I can convince myself that i can make full value out of the gear. It could take another year and if that time comes, then (theoretically) CCD options would be cheaper with better models.

Just my 2 cents worth.

Ps - That modded camera will give you many months if not at least a year to exploit! Good luck mate!

Darrin...
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  #6  
Old 16-02-2012, 09:37 AM
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graham.hobart (Graham stevens)
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ccd

Good advice again everyone, and I think I will stick to my set up for a while.
Thanks geezers
Graz
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