Single Sub M20

[nebulosity.]

I was having a tour around the sky the other morning enjoying the GoTo and tacking images of stuff and I was pretty impressed with this quick pic of M20.

8 inch f6 newt, Canon 1100D, ISO 6400, single 40 second exposure. :thumbsup:

Imagine doing this 50 years ago!

Cheers
Jo

[nebulosity.]

Also M16 and M17. :D

[JB80]

Neat images for single subs.
It's amazing how quick things are advancing in regards to imaging. I'd be stoked if I could replicate those efforts.

[cometcatcher]

I can't do it now. :P Weather too hot, sky too bright.

[jenchris]

I was comparing a single of jupiter to one taken by the 200inch Mt Palomar in 1970 my 8" did a better job by a long margin

[raymo]

Three great images Jo; what did you do with all the noise? Where did you
put it?
raymo

[nebulosity.]

Thanks Jarrod and Kevin :thumbsup:

[nebulosity.]

The Jupiter images are quite surprising!



I posted it to Kevin :D

To keep the noise down I generally attach the camera to the scope and focus and then go the bed, this give everything some time to cool off for a while before I get up around 1 or 2 am. Another important thing to do is to use live view as limitedly as possible, having the screen running generates a lot of unneeded warmth.

Cheers
Jo

[cometcatcher]

Yes he did! lol. :rofl:

How do you stop the dew from covering everything if you leave the gear out for so long?

[Astro_Bot]

Nice shots, Jo. :thumbsup:

[nebulosity.]

DEW? Whats that??? It's bone dry out here, :lol: in fact, we are in the middle of one of the worst droughts since 1926 :sadeyes: which is part of a long term drought that started the year before I was born!


:help:

[nebulosity.]

Thanks Bot :thumbsup:

[SimmoW]

Great stuff, I too hope to try such efficient imaging. I'm even wondering whether we might set up a new imaging category, eg max. 10 mins exposures. Sometimes I feel that ppl get far too carried away with truly insane exposure lengths, like 80 hrs or so!

[cometcatcher]

No dew, no cloud, cold temps. Dude, you live in astronomy heaven.

[raymo]

I live in astronomy hell.
raymo

[BruceG]

Careful or I'll send you some of my clouds :)

[raymo]

We get plenty of clouds, but have had 2.8mm of rain in
the last 108 days.
raymo

[Camelopardalis]

Single subs Jo... just wow :eyepop:

[nebulosity.]

Yeah, pretty impressive aye! I really love the 1100D, I should mention, in camera dark frame subtraction was turned off.

Jo

[Craige]

Nice pictures Jo!

Cheers Craige

[nebulosity.]

Thanks mate :thumbsup:

Just sorting though some more of the pics and found another one from that morning, Omega Cen. 5 subs this one.

Cheers
jo

[BruceG]

Hey Jo, fantastic images. Imagine what you will be producing when you get that 1100 modded!!!
I recently got a pre-loved 1000d and intend to mod that one myself. Just the removal of the rear filter. i don't care about the autofocus because it will be only used for astro work. My modded 300d is awesome but doesn't play with BYEOS and as an old fella I need live view.

[nebulosity.]

Great news Bruce :thumbsup:

Can't wait to hear how it goes, and see what you will be able to image with it.

Make sure you post some pics in the ATM/DIY forum.

With regard to removing the filter, I would probably just remove the whole filter assembly, this way you'll get rid of the AA filter as well. I haven't actually seen inside a 1000D but with the 350D the whole filter assembly can be removed with two screws (see pic) if your only going to use the camera on the scope removing the whole thing won't be a problem.

Oh, this won't work if your putting in a replacement filter though, which I don't think you are?

Cheers
Jo

[BruceG]

Removing the rear filter only leaves the front filter to block IR wavelengths, This is still needed to avoid stars becoming bloated due to chromatic aberration. The second reason for leaving the front filter in place is this is the one that has the sensor autoclean and also is a protective layer for the sensor. The rear filter removal will dramatically increase the sensitivity to Ha wavelengths even though the front filter is intact. The only reason some people install a clear filter in the rear position is to keep the autofocus accuracy (not considered as necessary for my use).