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11-12-2013, 06:23 AM   #541
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Horsehead Nebula (B33 in IC 434)

Horsehead Nebula captured just before the moon set around midnight Nov 10th. 13 five minute exposures through LPR filter. There are some internal reflection in my imaging train somewhere causing the big loop to the left from Alnitak.


Last edited by seti_v2; 09-22-2014 at 08:39 AM.
11-17-2013, 01:49 PM   #542
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Ok, not perfect but good enough i Think. Pentax K-5 + Pentax 55-300, handheld


The moon above Stockholm tonight nov-17




11-17-2013, 08:54 PM   #543
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@seti - Was this through a scope or a lens? - Jack
11-18-2013, 07:38 AM   #544
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QuoteOriginally posted by jbinpg Quote
@seti - Was this through a scope or a lens? - Jack
Scope. Celestron 8" SCT with focal reducer/corrector and Light Pollution Filter. Focal length 1280mm at F6.3

11-18-2013, 08:58 PM   #545
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QuoteOriginally posted by seti_v2 Quote
Scope. Celestron 8" SCT with focal reducer/corrector and Light Pollution Filter. Focal length 1280mm at F6.3
My C8 and 6.3 reducer shows optical gremlins similar to your internal reflection. Using a shorter spacer between the reducer and t-ring decreases the problem, but also lessens the reduction. I can get anywhere between f8 and f5 depending on how I configure spacers.
11-19-2013, 05:58 AM   #546
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QuoteOriginally posted by DeadJohn Quote
My C8 and 6.3 reducer shows optical gremlins similar to your internal reflection. Using a shorter spacer between the reducer and t-ring decreases the problem, but also lessens the reduction. I can get anywhere between f8 and f5 depending on how I configure spacers.
I think it is my LPR filter holder that is causing the internal reflection. there is a smooth bore to the one end with a very glossy paint. I just purchased some adapters to replace the filter holder to see if that fixes the issue. Prior to using this holder I never saw any reflection ghosts from the Focal Reducer. So here's hoping!
11-20-2013, 01:47 PM   #547
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Star Field near Caph

1/2 degree view of the star field near the bright star in Cassiopeia, Caph. Every star in this image is too dim to see with the naked eye.

Last edited by seti_v2; 09-22-2014 at 08:39 AM.
11-28-2013, 07:46 PM - 1 Like   #548
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C/2012 S1(ISON) Comet Pentax K5 ,Sigma 105mm/2.8 with Skytracker.








11-28-2013, 07:48 PM - 1 Like   #549
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In this picture,I'm not sure the line is a Meteor or a Satellite.You also can find M51 Whirlpool Galaxy in the bottom left corner.
105mm 90sec exposure ISO1250 F2.8
PENTAX K-5 ,SIGMA 105mm/2.8 EX Macro ,SkyTracker


11-28-2013, 11:38 PM   #550
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Valy, good picture of ISS transit.

gs2c, great nebula's picture, especially The Veil.

Billium28, TopherTheMe, Stone G. tonypysm, beautiful pictures.

You all created a page of delights.

I've missed some one? Yes, i missed a lot.
11-29-2013, 09:16 PM   #551
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Satellites usually show a steadier light trail than the one in your photo so I think this is a meteor. At sufficient resolution, satellite trails often show a regular banding pattern within the trail but it is often hard to see. Not all satellites are gyroscopically stabilized and rotate around an axis which leads to a characteristic banding pattern as the light brightens and dims during rotation due to varying reflective surfaces onboard.

Jack
11-29-2013, 09:17 PM   #552
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Almost forgot - great comet photo, Tony!

Jack
11-29-2013, 10:19 PM   #553
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QuoteOriginally posted by tonypysm Quote
C/2012 S1(ISON) Comet Pentax K5 ,Sigma 105mm/2.8 with Skytracker.






Wow, nice! I hope to catch it on the way back if it makes it. Crossing my fingers!
11-30-2013, 12:00 AM   #554
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Did some fiddling with a 14.6 pound scope (+ camera) on a barn-door mount. Couple images stacked in DSS. Learning curve involved.
edit: this looks little better than my image from last night, might have something to do with less humidity tonight.

Last edited by Ex Finn.; 11-11-2014 at 05:45 PM.
11-30-2013, 12:33 AM   #555
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Nice! My AstroTrac tracking mount is essentially a fancy barndoor device but it does a good job.

Jack
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