K-5 For Astrophotography

**bofh** · 08-24-2015, 11:56 AM

Milky way between the star Sadr (upper left) and the dumbbell nebula (lower right) and rather faint the cirrus nebula (lower left).

E.

XLXW · 08-24-2015, 03:28 PM

Originally posted by bofh

Milky way between the star Sadr (upper left) and the dumbbell nebula (lower right) and rather faint the cirrus nebula (lower left).

E.

Nice photograph. Well done.

seti_v2 · 09-13-2015, 05:42 AM - **1 Like**

After months of bad weather and no imaging finally got out last night. NGC7000 in h-alpha. Pentax k5 ISO400 7x900" exposures. Orion refractor and h-alpha filter.

Aaron28 · 09-13-2015, 07:57 AM

cool!

XLXW · 09-13-2015, 04:17 PM

Stunning photograph. Well done. Very well done.

wigley891 · 09-14-2015, 06:28 AM

seti_v2 that is a nice shot. Is your K5 modified to be monochrome? Also which h-alpha did you use? I've been wondering about attempting some Ha stuff with my K5IIs, even though my K5IIs is not modified and I know that would effect exposure times.

seti_v2 · 09-14-2015, 07:29 AM

Originally posted by wigley891

seti_v2 that is a nice shot. Is your K5 modified to be monochrome? Also which h-alpha did you use? I've been wondering about attempting some Ha stuff with my K5IIs, even though my K5IIs is not modified and I know that would effect exposure times.

My Pentax k5 has a full spectrum mod (essentially just the hotmirror removed) done by Kolari Vision. I use an Omega Optical 7nm H-alpha filter. Since only the red channel picks up h-alpha I just extract and process the red channel as a monochromatic image. DSS for stacking, then FITS Liberator to do initial stretch and red channel extraction.

Hope that helps!

**eccs19** · 09-16-2015, 03:26 PM

Question for the K5 users. It's probably in this thread somewhere, but not sure exactly what to search. So the new K3ii can do the sensor shift to keep the stars sharp. Can this be done with the K5iis with the optional GPS unit, or not? Thanks.

sebberry · 09-16-2015, 03:42 PM

Originally posted by eccs19

Question for the K5 users. It's probably in this thread somewhere, but not sure exactly what to search. So the new K3ii can do the sensor shift to keep the stars sharp. Can this be done with the K5iis with the optional GPS unit, or not? Thanks.

Pretty sure it can. That's the whole point behind the Pentax GPS module.

SirTomster · 09-16-2015, 03:57 PM

Originally posted by eccs19

Question for the K5 users. It's probably in this thread somewhere, but not sure exactly what to search. So the new K3ii can do the sensor shift to keep the stars sharp. Can this be done with the K5iis with the optional GPS unit, or not? Thanks.

Yes it can. I have the K5 and I use the O-GPS1 to take shots up to 5 minutes long. So the K5IIs does this as well.

The K3II just has the GPS Built in so you do not have to buy the O-GPS1 unit.

**eccs19** · 09-16-2015, 04:18 PM

Thanks for the confirmation. Greatly appreciated.

JimmyDranox · 09-16-2015, 04:21 PM

@seti_v2. It looks very well. Just this night I have made the difference between your pictures and another one taken through a 3.5nm Baader filter, with a QHY9 camera, and yours is OK. Keep the good work.

Baader reinforced 3,5 nm H-Alfa

Just scroll down for the picture.

seti_v2 · 09-17-2015, 06:33 AM - **1 Like**

Got Oiii data added now. NGC7000 in bicolor.

I wish I had the money for 3.5nm filters and dedicated qhy ccd. I don't think my achro set up, cheap filters, and Pentax K5 are doing too bad!

XLXW · 09-17-2015, 09:06 AM

Not "bad" at all. I wish that I could take photographs like that.

---------- Post added 09-17-15 at 09:10 AM ----------

I have those narrow band filters for my telescope. I'm wondering if I put them onto an eyepiece and took the photograph through the eyepiece with the filter on the eyepiece if that would work? Has anyone out there done eyepiece projection photography with a DSLR and a Schmidt Cassegrain telescope?

JimmyDranox · 09-17-2015, 10:05 AM - **1 Like**

Originally posted by seti_v2

Got Oiii data added now. NGC7000 in bicolor.

I wish I had the money for 3.5nm filters and dedicated qhy ccd. I don't think my achro set up, cheap filters, and Pentax K5 are doing too bad!

Your set up is doing very well. I could say surprisingly well.

09-16-2015, 04:21 PM	#912
JimmyDranox Veteran Member Join Date: Oct 2012 Location: Ploiesti, Romania Photos: Gallery \| Albums Posts: 1,632	@seti_v2. It looks very well. Just this night I have made the difference between your pictures and another one taken through a 3.5nm Baader filter, with a QHY9 camera, and yours is OK. Keep the good work. Baader reinforced 3,5 nm H-Alfa Just scroll down for the picture. Last edited by JimmyDranox; 09-16-2015 at 04:28 PM.

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08-24-2015, 11:56 AM	#901
bofh Loyal Site Supporter Join Date: May 2011 Location: Nottuln, North Rhine-Westphalia Photos: Gallery Posts: 134	Milky way between the star Sadr (upper left) and the dumbbell nebula (lower right) and rather faint the cirrus nebula (lower left). E.

08-24-2015, 03:28 PM	#902
XLXW Senior Member Join Date: Apr 2012 Posts: 102	Originally posted by bofh Milky way between the star Sadr (upper left) and the dumbbell nebula (lower right) and rather faint the cirrus nebula (lower left). E. Nice photograph. Well done.

09-13-2015, 05:42 AM - 1 Like	#903
seti_v2 Forum Member Join Date: Oct 2013 Posts: 59	After months of bad weather and no imaging finally got out last night. NGC7000 in h-alpha. Pentax k5 ISO400 7x900" exposures. Orion refractor and h-alpha filter.

09-13-2015, 07:57 AM	#904
Aaron28 Pentaxian Join Date: Jan 2015 Location: Huntsville, Al Posts: 7,131	cool!

09-13-2015, 04:17 PM	#905
XLXW Senior Member Join Date: Apr 2012 Posts: 102	Stunning photograph. Well done. Very well done.

09-14-2015, 06:28 AM	#906
wigley891 New Member Join Date: Apr 2015 Posts: 6	seti_v2 that is a nice shot. Is your K5 modified to be monochrome? Also which h-alpha did you use? I've been wondering about attempting some Ha stuff with my K5IIs, even though my K5IIs is not modified and I know that would effect exposure times.

09-14-2015, 07:29 AM	#907
seti_v2 Forum Member Join Date: Oct 2013 Posts: 59	Originally posted by wigley891 seti_v2 that is a nice shot. Is your K5 modified to be monochrome? Also which h-alpha did you use? I've been wondering about attempting some Ha stuff with my K5IIs, even though my K5IIs is not modified and I know that would effect exposure times. My Pentax k5 has a full spectrum mod (essentially just the hotmirror removed) done by Kolari Vision. I use an Omega Optical 7nm H-alpha filter. Since only the red channel picks up h-alpha I just extract and process the red channel as a monochromatic image. DSS for stacking, then FITS Liberator to do initial stretch and red channel extraction. Hope that helps!

09-16-2015, 03:26 PM	#908
eccs19 Site Supporter Join Date: Jul 2008 Location: Lisle, Ontario Photos: Gallery Posts: 1,510	Question for the K5 users. It's probably in this thread somewhere, but not sure exactly what to search. So the new K3ii can do the sensor shift to keep the stars sharp. Can this be done with the K5iis with the optional GPS unit, or not? Thanks.

09-16-2015, 03:42 PM	#909
sebberry Pentaxian Join Date: Jan 2009 Location: Frozen white North Photos: Albums Posts: 1,135	Originally posted by eccs19 Question for the K5 users. It's probably in this thread somewhere, but not sure exactly what to search. So the new K3ii can do the sensor shift to keep the stars sharp. Can this be done with the K5iis with the optional GPS unit, or not? Thanks. Pretty sure it can. That's the whole point behind the Pentax GPS module.

09-16-2015, 03:57 PM	#910
SirTomster Veteran Member Join Date: Mar 2014 Posts: 416	Originally posted by eccs19 Question for the K5 users. It's probably in this thread somewhere, but not sure exactly what to search. So the new K3ii can do the sensor shift to keep the stars sharp. Can this be done with the K5iis with the optional GPS unit, or not? Thanks. Yes it can. I have the K5 and I use the O-GPS1 to take shots up to 5 minutes long. So the K5IIs does this as well. The K3II just has the GPS Built in so you do not have to buy the O-GPS1 unit.

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09-16-2015, 04:18 PM	#911
eccs19 Site Supporter Join Date: Jul 2008 Location: Lisle, Ontario Photos: Gallery Posts: 1,510	Thanks for the confirmation. Greatly appreciated.

09-17-2015, 06:33 AM - 1 Like	#913
seti_v2 Forum Member Join Date: Oct 2013 Posts: 59	Got Oiii data added now. NGC7000 in bicolor. I wish I had the money for 3.5nm filters and dedicated qhy ccd. I don't think my achro set up, cheap filters, and Pentax K5 are doing too bad!

09-17-2015, 09:06 AM	#914
XLXW Senior Member Join Date: Apr 2012 Posts: 102	Not "bad" at all. I wish that I could take photographs like that. ---------- Post added 09-17-15 at 09:10 AM ---------- I have those narrow band filters for my telescope. I'm wondering if I put them onto an eyepiece and took the photograph through the eyepiece with the filter on the eyepiece if that would work? Has anyone out there done eyepiece projection photography with a DSLR and a Schmidt Cassegrain telescope?

09-17-2015, 10:05 AM - 1 Like	#915
JimmyDranox Veteran Member Join Date: Oct 2012 Location: Ploiesti, Romania Photos: Gallery \| Albums Posts: 1,632	Originally posted by seti_v2 Got Oiii data added now. NGC7000 in bicolor. I wish I had the money for 3.5nm filters and dedicated qhy ccd. I don't think my achro set up, cheap filters, and Pentax K5 are doing too bad! Your set up is doing very well. I could say surprisingly well.