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Saturn 26/08 with 300p


CraigT82
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Seeing last night was average overall, with some good moments but not many.  I did do a nice long session and capture a total 25x 2minute videos on Saturn from 10.19pm to 11.11pm (BST).

I junked 8 captures and kept 17, so a total of 34 minutes has gone into this. Stacked best 10%.      Firecapture>AS3>Astrosurface>Winjupos>Gimp.

Skywatcher blue tube 300p with QHY462c, APM 2.7x barlow and ZWO ADC. FC reports FL of 4300mm (F/14 ish) and resolution of 0.14"PP.

Capture details were: Exp - 4ms, Gain - 60%, FPS - 251.

 

Saturn_2021-08-26-2152UT_OSC.png

Edited by CraigT82
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Excellent shot !

I was observing Saturn last night with my 12 inch dob and the seeing was a bit "variable" here in North Somerset.

The colour tints you have captured are really nice :thumbright:

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Thanks for the kind words all.

Yes seeing was very variable for this session. At times it was so mushy I thought the focuser had slipped.

Forecast is looking good for Sunday with potentially high pressure over the UK so fingers crossed for having another go then.

 

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29 minutes ago, U Cyg said:

Excellent shot. 

I like the way the planet shows through the rings, not something I have seen in images very often.

Angie

Thanks. I think that's actually more of an an error that I've made that's crept in when I was processing the rings and globe seperately, I need to reprocess and repost when I have the time. 

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Superb work, Craig!

I must say I'm a little jealous, as I've been hefting a 300mm Newtonian to and from my observing position in the garden for the past 9 years and have never once had an impressive view or capture of a planet! Mine appears to have the light-gathering power of a 300mm, but the resolution of a toy 'scope!

Regards, and clear skies.

Mike.

 

Edited by mcrowle
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8 hours ago, mcrowle said:

Superb work, Craig!

I must say I'm a little jealous, as I've been hefting a 300mm Newtonian to and from my observing position in the garden for the past 9 years and have never once had an impressive view or capture of a planet! Mine appears to have the light-gathering power of a 300mm, but the resolution of a toy 'scope!

Regards, and clear skies.

Mike.

 

I think these scopes do need a bit of modding to get them working properly. The primary mirror cell in mine wasn't working as it should so you might want to take a look at yours. The floating triangles were locked solid and the edge support studs were well off the mirror's CoG line. Pics and stuff here...


https://stargazerslounge.com/topic/376811-adventures-with-an-old-sw-300p/?do=findComment&comment=4081862

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4 hours ago, CraigT82 said:

I think these scopes do need a bit of modding to get them working properly. The primary mirror cell in mine wasn't working as it should so you might want to take a look at yours. The floating triangles were locked solid and the edge support studs were well off the mirror's CoG line. Pics and stuff here...


https://stargazerslounge.com/topic/376811-adventures-with-an-old-sw-300p/?do=findComment&comment=4081862

Many thanks, Craig - I'll take a look at that.

The only mod I've done so far was to replace the support springs with stronger ones (also following a recommendation on this forum).

Regards, Mike

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Craig that's remarkable given the lowly elevation of Saturn! Is the 300p a new addition? I seem to recall you had a Fullerscope previously.

Also is your barlow the APM 2.7x which also works as coma corrector? I ask because I've often wondered whether uncorrected coma might impair planetary images when using a Newt. You'd think not given the small image size, but maybe it does have some impact?

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3 hours ago, Tommohawk said:

Craig that's remarkable given the lowly elevation of Saturn! Is the 300p a new addition? I seem to recall you had a Fullerscope previously.

Also is your barlow the APM 2.7x which also works as coma corrector? I ask because I've often wondered whether uncorrected coma might impair planetary images when using a Newt. You'd think not given the small image size, but maybe it does have some impact?

Thanks,  I've still got the Fullerscope, it's  fitted out for white light solar at the minute but I haven't got round to using it much yet. 

Yes it's the coma correcting barlow. Shouldn't really be necessary for planetary if the target can be kept bang on-axis. It should theoretically help with lunar though, when using the full sensor size at native FL, and you're capturing data outside the diffraction limited field. 

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