Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-10-2015, 09:13 AM - 3 Likes   #181
Forum Member




Join Date: May 2011
Location: Marseille Provence
Photos: Albums
Posts: 61
Pentax Q : Super sensor... limited to 30 seconds :(

.
M51 : Ngc-5194+5195 Whirlpool Galaxy

1st night = clear sky but Huge turbulence + the Full Moon near :
... once more, I had to discard ~50% of my shots !
+ yesterday, hazy sky but more quiet

M51 Whirlpool Galaxy : ~27 Million Light-Years from Q10 - apparent size : 6' x 9'
Magnitude minus Air- and Dust- and Light-Pollution is down to 10 !?
M51 Whirlpool : Q10 + SkyGlow Filter + Skywatcher 200/1000 = 84 x 30 seconds - ISO 1600 :
stacking : DeepSkyStacker 3.3 - finish : Elements 3.0




... in fact, it's not 1 Galaxy... but 2 ones which met each other !
the big Ngc-5194 has caught the little Ngc-5195...

the Q10 is not ridiculous vs the K5 which can hold 5 x 15 MINUTES total exposure at a noiseless ISO 80 !
... here are 4 photos of M51 Whirlpool Galaxy with Pentax K5 at the end of both pages :
http://www.chassimages.com/forum/index.php/topic,118675.75.html
http://www.chassimages.com/forum/index.php/topic,118675.100.html
the K5 was on a 254/1200 f/4.7 Skywatcher !

enjoy !


Last edited by geo444; 05-11-2015 at 12:51 AM.
05-11-2015, 12:49 PM   #182
Junior Member




Join Date: Jun 2007
Location: Europe - France - Paris
Photos: Gallery
Posts: 35
Well done , those are great
05-11-2015, 02:24 PM   #183
Pentaxian
Transit's Avatar

Join Date: Aug 2007
Location: Whanganui NZ
Photos: Gallery | Albums
Posts: 4,074
QuoteOriginally posted by geo444 Quote
.
....the Q10 is not ridiculous vs the K5 which can hold 5 x 15 MINUTES total exposure at a noiseless ISO 80 !
... here are 4 photos of M51 Whirlpool Galaxy with Pentax K5 at the end of both pages :
... Pentax me revoila : mon K5 arrive juste !
... Pentax me revoila : mon K5 arrive juste !
the K5 was on a 254/1200 f/4.7 Skywatcher !

enjoy !
Great shot thanks
Looks like a lot of work went into it !
Interesting to compare with the K-5 image.
The Q10 one almost fills the frame too much, the K-5 version gives me
more of a feeling of awesome scary vastness of it all.
Incredible you can extract such a tiny amount of light from a rediculous distance
and bring it to life like that
Pete
05-13-2015, 01:21 PM   #184
Forum Member




Join Date: May 2011
Location: Marseille Provence
Photos: Albums
Posts: 61
Pentax Q : Super sensor... limited to 30 seconds :(

QuoteOriginally posted by rafa75 Quote
Well done , those are great
Thanks very much !

Very impressive too, your Looong reach :

www.pentaxforums.com/forums/136-pentax-q/173602-reach-q-images-75.html#post3250329

Caveau " Famille FAURE Charles du Tilleul de Villard "

just one question : where are the Lieu-dit / Village : Tilleul / Villard ?



QuoteOriginally posted by Transit Quote
Great shot thanks
Looks like a lot of work went into it !
Interesting to compare with the K-5 image.
The Q10 one almost fills the frame too much, the K-5 version gives me
more of a feeling of awesome scary vastness of it all.
Incredible you can extract such a tiny amount of light from a ridiculous distance
and bring it to life like that
Pete
Many Thanks Pete !

yes, the K-5 version is more like a wide Sky-scape (?) but I couldn't show the Q10's Potential !
www.pentaxforums.com/forums/38-photographic-technique/256035-astrophotography-k5-q-adapter.html
- Q10's 30 second : limited to the same, the K5 would do much worse (links=30x more)
- particular meteorologic situation : often Cold air from North over Warm sea,
this leading to huge turbulence the Q10 suffers much more, 3.7x ?
thus you get much more keepers when the Sky is hazy...

how is generally the Sky color at Whanganui NZ ?
exactly how are the Open Shades colored : more Cyan or rather Magenta ?
here in Provence it's a bit Magenta as the Sky is 100% Blue
as you can see here at Manosque,
but in Japan, it's a bit Cyan, as the Sky is 95% Blue ~5% Green (?)



Pentax K-5's direct Jpeg !




Last edited by geo444; 05-14-2015 at 03:06 AM.
05-13-2015, 04:15 PM   #185
Pentaxian
Transit's Avatar

Join Date: Aug 2007
Location: Whanganui NZ
Photos: Gallery | Albums
Posts: 4,074
QuoteOriginally posted by geo444 Quote

how is generally the Sky color at Whanganui NZ ?
exactly how are the Open Shadows colored : more Cyan or more Magenta ?
here in Provence it's a bit Magenta as the Sky is 100% Blue
as you can see here at Manosque,
but in Japan, it's a bit Cyan, as the Sky is 95% Blue ~ 5% Green (?)
thanks for the info
as far as the sky colour, not sure, will try to get a sample if the cloud clears
05-16-2015, 01:38 AM   #186
kwb
Site Supporter




Join Date: Mar 2015
Photos: Gallery | Albums
Posts: 193
02 zoom can show you galaxies!

I was curious if 02 zoom lens with my Q7 can see the Dubhe, one of the Big Dipper stars, as a double star. I took this one with the longest end of 02 zoom (stacked many frames together).

I drew two squares in the above picture. The top one shows where Dubhe is, it seems to show as a double star. Good. But do you see what I happened to see, in the bottom square? Below is a 100% crop of this area:


These two blobs, one roundish and the other kind of flatish, are M81 and M82 galaxies! I was so happy to find these guys using just Q7 and 02 zoom!

If you're not sure which blob I'm talking about, compare the above with the following that was taken with Q7 and Canon FD 135mm F/3.5 (stacked 128 of 2 second frames).


Of course longer lens with bigger aperture size gives you a better view, but I thought it was cool to be able to capture these guys at all using just Q7 and a kit lens!
05-16-2015, 02:37 PM   #187
Loyal Site Supporter
baro-nite's Avatar

Join Date: Aug 2011
Location: North Carolina, USA
Photos: Gallery | Albums
Posts: 4,362
Original Poster
QuoteOriginally posted by kwb Quote
I thought it was cool to be able to capture these guys at all using just Q7 and a kit lens!
Excellent and well spotted! TFS
05-17-2015, 11:19 PM   #188
kwb
Site Supporter




Join Date: Mar 2015
Photos: Gallery | Albums
Posts: 193
QuoteOriginally posted by baro-nite Quote
Excellent and well spotted! TFS
Thanks!

06-04-2015, 04:09 AM   #189
Forum Member




Join Date: May 2011
Location: Marseille Provence
Photos: Albums
Posts: 61
Pentax Q : Super sensor... limited to 30 seconds :(

QuoteOriginally posted by Transit Quote
thanks for the info
as far as the sky colour, not sure, will try to get a sample if the cloud clears
you can see the open shade tint on the white shirt collars,
someone who is walking in the street, under the blue sky
in the shade of his head, of his hair, of his neutral hat !



1st night = clear sky but Huge turbulence + the Full Moon near :
... once more, I had to discard ~50% of my shots
+ last WE, steady, but hazy sky !

M-106 Galaxy : ~25 Million Light-Years from Q10 - apparent core size 2.5'x 6'
Magnitude minus Air- and Dust- and Light-Pollution worse than 10 !?
M-106 Galaxy : Q10 + SkyGlow Filter + Skywatcher 200/1000 = 88 x 30 seconds - ISO 1600 :
stacking : DeepSkyStacker 3.3 - finish : Elements 3.0





Shot at sea level in a big city = lots of light-pollution & turbulence !

... and what about accuracy ? ^ ^

I highlighted 2 Stars close to the Galaxy :
- the white one named USNOA2-1350-08095435 : Magnitude 17.3
- the blue one named USNOA2-1350-08095450 : Magnitude 17.1
the distance in between is about ~8.5 arc second

to " Live-View " M106, it's here :
SKY-MAP.ORG
this view is -90 counterclockwise from my photo
... the 2 Stars are at the end below M106...
use the scale at left to zoom in / out

~8.5 arc second = ~26 pixels on my original picture...
... so the accuracy is Better than 1 arc second

One arc second = 1/1 296 000 of a circle
in other words 1/3 600 of 1 degree
1 degree is ~ half your thumb's nail width, your arm held out to the sky...

you have to draw 7 200 parallel fine lines on your thumb's nail !
... looking from your arm's full length... good luck !

not so bad in the particularly poor conditions I shoot Astro Photos ?
... with very amateurish tools : Skywatcher Black HEQ5 + Blue 200/1000 T30P.

heat up your Pentax Q !
.

Last edited by geo444; 06-05-2015 at 12:17 AM.
06-06-2015, 06:12 PM   #190
Pentaxian
Transit's Avatar

Join Date: Aug 2007
Location: Whanganui NZ
Photos: Gallery | Albums
Posts: 4,074
QuoteOriginally posted by geo444 Quote
you can see the open shade tint on the white shirt collars,
someone who is walking in the street, under the blue sky
in the shade of his head, of his hair, of his neutral hat !

Thanks for the clarification, I was wondering
It's clouded over again atm
09-28-2015, 01:23 AM - 1 Like   #191
kwb
Site Supporter




Join Date: Mar 2015
Photos: Gallery | Albums
Posts: 193
Supermoon eclipse

Orion Spaceprobe 3:


And Tamron SP Adaptall-2 60-300mm F3.8-5.4 at 300mm, full open:
12-13-2015, 08:24 AM - 1 Like   #192
New Member




Join Date: Dec 2015
Posts: 1
Eskimo Nebula

NGC2392 Pentax Q - BKP300 f5 1500mm - TS160JP - 4 x 30 seconds - ISO 1600 :
Attached Images
 
12-14-2015, 10:05 AM   #193
Veteran Member




Join Date: Jan 2012
Location: United States
Posts: 343
i know the 3rd party adapters have shutter speed restrictions like max 2 sec shutter speed due to electronic shutter. I know this rules out Deep Sky Objects unless I buy the official adapter. But can you take video with a 3rd party adapter? I am interested in the q10 as a planetary video cam for my telescope. I was thinking a BSI small pixel sensor should be perfect for that purpose. Has anyone tried this?
12-14-2015, 10:45 PM   #194
kwb
Site Supporter




Join Date: Mar 2015
Photos: Gallery | Albums
Posts: 193
QuoteOriginally posted by y0chang Quote
i know the 3rd party adapters have shutter speed restrictions like max 2 sec shutter speed due to electronic shutter. I know this rules out Deep Sky Objects unless I buy the official adapter. But can you take video with a 3rd party adapter? I am interested in the q10 as a planetary video cam for my telescope. I was thinking a BSI small pixel sensor should be perfect for that purpose. Has anyone tried this?
Though I haven't done this for astro- purpose, on my Q7 I can take a video with 3rd party adapter. I can only record up to 25 minutes at a time, but that's a restriction of Q7 itself and applies to everything including Q-native lenses.

I guess Q/Q10 are the same.

Best,
kwb
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
astro-q10, camera, filter, galaxies, galaxy, h-alpha, mirrorless, nebulae, pentax q, pentax q10, pentax q7, q-s1, q10, q7, sky, smc, whirlpool
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For the Astro Shooters wildlifephotog Photographic Technique 2 10-15-2012 10:41 AM
Enabling astro tracking without the O-GPS1 atekant Pentax K-5 2 04-06-2012 10:42 PM
Joined the Q Club. Dr_who Pentax Q 9 04-04-2012 01:29 AM
Q for the Q & DSLR users jezza323 Pentax Q 6 02-05-2012 09:13 AM
Astro-Photo Unregistered User Troubleshooting and Beginner Help 9 02-24-2011 08:47 AM



All times are GMT -7. The time now is 06:24 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top