#21  
Old 14-04-2018, 12:20 PM
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astronobob (Bob)
Casual Cosmos Capturer

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Quote:
Originally Posted by Camelopardalis View Post
Bob, I have both a 1600 and a 178 that I use with my Esprit 100 (550mm F/L).

I find the 1600 is just collects signal more quickly (larger pixels) and calibrates very consistently, whereas the 178 has some whacky amp glow that makes it more challenging. The dark frames I've seen from a 183 are similarly haunted.

The objects you want to chase would no doubt be better served by a larger scope than I'm using, in which case I'd say it swings in favour of the 1600. The reality of the conditions in SE QLD the majority of the time means that we'd be really lucky to see any improvement in resolution with the smaller pixels of the 178/183, and they're a bigger hassle to use
Thanx, Dunk, taken onboard champ
I am also considering that my SkyWatcher Newts dont have the best optic surfaces about either, prob 1/5 - 1/8th wave; not 1/15 - 1/20th like the finest out there.
SE Qld going up crap-creek without a paddle at best of times,
Overall,, getting through the LP with mono, & the extra resolution with out the bayer matrix should tickle the armpits enough
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  #22  
Old 14-04-2018, 03:15 PM
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Camelopardalis (Dunk)
Drifting from the pole

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Bob, I’m not sure how much difference a better surface would have over the course of a “long” exposure DSO image with any of the above sensors, I’d reckon the conditions would be doing their level best to muck it up

Btw, by “long” I mean a couple of minutes...with more aperture than my 4” you might be down to a couple of minutes or thereabouts even with narrowband.
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  #23  
Old 14-04-2018, 11:55 PM
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astronobob (Bob)
Casual Cosmos Capturer

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Join Date: Jun 2010
Location: Gold Coast SE QLD
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I'm not sure about optic quality either, Dunk, just a thought ?
Reckon your quite on par with the exposures tho
Bit of trial & error when/if happens will no doubt be atleast amusing - part & parcel
I should check through the 'deep sky' images for some stats aswell.
Cheers.
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