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Hi everyone

After an eventless 3 hours on the cone nebula last night and with the onset of barren skies with only fuzzy blobs they call galaxies to image, we had a last reminder about short exposures. Just 7x45s; gotta love fast Newtonian reflectors:) Last call for the milky way I suppose.

Thanks for looking.

357757697_44(copy).thumb.jpg.6439ff470997a8956d2ebe6d749b4abc.jpg

 

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I prefer this one as the colour is there but not the colour halos, nice image sparkly.

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Well I like it anyway!

The 'Galaxy Season' is a challenge to be rellished though.....

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13 hours ago, laser_jock99 said:

Galaxy Season' is a challenge

Too right. You can do m44 in 5 minutes. Making a start on a galaxy takes 5 hours!

**am in the process of persuading a mate he needs a 12" f4. I'd look after it for him whilst he wasn't visiting of course;) Oh, and there's this: mount with telescope thrown in for free...

Edited by alacant
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10 hours ago, alacant said:

Too right. You can do m44 in 5 minutes. Making a start on a galaxy takes 5 hours!

**am in the process of persuading a mate he needs a 12" f4. I'd look after it for him whilst he wasn't visiting of course;) Oh, and there's this: mount with telescope thrown in for free...

I've got a 10" F4.7 Skywatcher 250PDS going cheap/free if you want it? Focal length is 1200mm- just about long enough to get some galaxy details.

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10 minutes ago, laser_jock99 said:

10" F4.7 Skywatcher 250PDS going cheap/free if you want it? Focal length is 1200mm- just about long enough to get some galaxy details.

Hi. Thanks so much for the offer but we've got an old blue tube 10" f4.7 into which we've put a 70mm secondary. Very similar I think. But yeah, I think 1200mm is the entry level for spiral arms being anything other than use-your-imagination smudges.

Have you tried the 12" f4 or f5 models? Any thoughts?

Cheers and thanks again.

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23 minutes ago, laser_jock99 said:

I've got a 10" F4.7 Skywatcher 250PDS going cheap/free if you want it? Focal length is 1200mm- just about long enough to get some galaxy details.

1200mm is more than enough for galaxy detail if you have small pixels. Having imaged with twice that focal length I can find no advantage in doing so.

Olly

 

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27 minutes ago, alacant said:

Have you tried the 12" f4 or f5 models? Any thoughts?

Cheers and thanks again.

I have the 12" and 10" Revelation Astro/GSO F4 Newtonian scopes. The 12" F4 is a bit of beast to tame but can give interesting results especially with the 0.7x ASA Keller coma corrector/reducer. Imagine a 1000mm focal length F2.9 scope.....

I did some galaxy imaging with this set up- a single 140 second sub of M51

11755944213_f3c8923c6a_b.jpg

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11 hours ago, laser_jock99 said:

a single 140 second sub of M51

Amazing. I mean it's gonna take hours with a 10" f5 to get anywhere close, hence my interest in the big f4;)

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12 hours ago, alacant said:

I think 1200mm is the entry level for spiral arms being anything other than use-your-imagination smudges

Hi folks

Just want to check, does this relate to visual observing too ?  

Cheers

 

 

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Visually, You can get spiral arms with 10” 1200mm focal lengnth scope. But you need dark dark sky and they will be right on the edge of vision on only a handful of galaxies. I’d say forget about visual spiral arms. Think more faint fuzzy blobs with lumps of slightly brighter fuzz.

For spirals, you need to image, or buy a big +16” aperture scope and dark sky.

Paul

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