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seti_v2 · 11-12-2013, 06:23 AM

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.

peos99 · 11-17-2013, 01:49 PM

Ok, not perfect but good enough i Think. Pentax K-5 + Pentax 55-300, handheld

The moon above Stockholm tonight nov-17

**jbinpg** · 11-17-2013, 08:54 PM

@seti - Was this through a scope or a lens? - Jack

seti_v2 · 11-18-2013, 07:38 AM

Originally posted by jbinpg

@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

DeadJohn · 11-18-2013, 08:58 PM

Originally posted by seti_v2

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.

seti_v2 · 11-19-2013, 05:58 AM

Originally posted by DeadJohn

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!

seti_v2 · 11-20-2013, 01:47 PM

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.

tonypysm · 11-28-2013, 07:46 PM - **1 Like**

C/2012 S1(ISON) Comet Pentax K5 ,Sigma 105mm/2.8 with Skytracker.

tonypysm · 11-28-2013, 07:48 PM - **1 Like**

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

JimmyDranox · 11-28-2013, 11:38 PM

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.

**jbinpg** · 11-29-2013, 09:16 PM

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

**jbinpg** · 11-29-2013, 09:17 PM

Almost forgot - great comet photo, Tony!

Jack

**mattb123** · 11-29-2013, 10:19 PM

Originally posted by tonypysm

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!

**Ex Finn.** · 11-30-2013, 12:00 AM

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.

**jbinpg** · 11-30-2013, 12:33 AM

Nice! My AstroTrac tracking mount is essentially a fancy barndoor device but it does a good job.

Jack

11-12-2013, 06:23 AM	#541
seti_v2 Forum Member Join Date: Oct 2013 Posts: 59	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.

11-20-2013, 01:47 PM	#547
seti_v2 Forum Member Join Date: Oct 2013 Posts: 59	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.

11-30-2013, 12:00 AM	#554
Ex Finn. Site Supporter Join Date: Nov 2007 Location: Southern Maryland. Espoo. Kouvola. Photos: Gallery \| Albums Posts: 7,975	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.

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11-17-2013, 01:49 PM	#542
peos99 Forum Member Join Date: Jul 2012 Location: Stockholm, Sweden Posts: 53	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
jbinpg Site Supporter Join Date: Mar 2008 Location: Prince George, BC Photos: Gallery \| Albums Posts: 3,546	@seti - Was this through a scope or a lens? - Jack

11-18-2013, 07:38 AM	#544
seti_v2 Forum Member Join Date: Oct 2013 Posts: 59	Originally posted by jbinpg @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
DeadJohn Pentaxian Join Date: Jan 2011 Location: New York Posts: 4,834	Originally posted by seti_v2 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
seti_v2 Forum Member Join Date: Oct 2013 Posts: 59	Originally posted by DeadJohn 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!

11-28-2013, 07:46 PM - 1 Like	#548
tonypysm Junior Member Join Date: May 2013 Posts: 29	C/2012 S1(ISON) Comet Pentax K5 ,Sigma 105mm/2.8 with Skytracker.

11-28-2013, 07:48 PM - 1 Like	#549
tonypysm Junior Member Join Date: May 2013 Posts: 29	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
JimmyDranox Veteran Member Join Date: Oct 2012 Location: Ploiesti, Romania Photos: Gallery \| Albums Posts: 1,632	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
jbinpg Site Supporter Join Date: Mar 2008 Location: Prince George, BC Photos: Gallery \| Albums Posts: 3,546	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
jbinpg Site Supporter Join Date: Mar 2008 Location: Prince George, BC Photos: Gallery \| Albums Posts: 3,546	Almost forgot - great comet photo, Tony! Jack

11-29-2013, 10:19 PM	#553
mattb123 Site Supporter Join Date: Apr 2010 Location: Colorado High Country Photos: Gallery Posts: 10,873	Originally posted by tonypysm 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, 12:33 AM	#555
jbinpg Site Supporter Join Date: Mar 2008 Location: Prince George, BC Photos: Gallery \| Albums Posts: 3,546	Nice! My AstroTrac tracking mount is essentially a fancy barndoor device but it does a good job. Jack

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