Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
07-30-2009, 02:48 PM   #16
Senior Member




Join Date: Nov 2008
Photos: Gallery
Posts: 241
QuoteOriginally posted by Jonson PL Quote
Those shots are seriously good. Really like the second one. Was it easy to make the two frame mosaic ?
You keep the shutterspeed in the 2 minutes range, so it will not turn into trails, but be spots ?

This is where a built of the prototype K 20/1.4 AL lens, would be awesome :
K 20/1.4 AL

The roumour of a 35/1.4 would also be welcome, I guess


Wim had a nice digital shot, here :
Damaraland (Namibia): star trails (1 img) [Page 1]: Pentax SLR Talk Forum: Digital Photography Review

Thank you. These are not tripod shots. The first two shots were taken with the camera riding piggyback on my telescope. The telescope is equatorial aligned and tracks the stars as they (actually the Earth's rotation is causing the apparent motion) move across the sky. The trees are slightly blurred as a result. I would rarther have a slightly blurred landscape instead of stars. The cameras were set to "B" and exposed manually.

As you pointed out, a fast wide angle lens, say 35mm or even the wonderful 20mm would allow a longer exposure without apparent trailing of either stars or landscape in relatively short exposures.

I used Autostitch to mosaic the two frames. It's easy and the program is free. Just be sure to overlap at least 20 % and all frames must be taken from the same position.

Regards,

Jim

07-30-2009, 04:46 PM   #17
Forum Member




Join Date: Jul 2009
Location: Japan
Posts: 89
I would loose my mind with a 20/1.4. It is my ideal lens.
08-09-2009, 05:44 AM   #18
Senior Member




Join Date: Nov 2008
Photos: Gallery
Posts: 241
Ektar 100 Test

I finally got around to testing Kodak's new Ektar 100 color negative film.

My test incorporated a 50mm lens set at f/2.8 and a 30 minute exposure. I shot the darkest part of the sky, directly overhead in the constellation Cygnus. This area has enough hydrogen Alpha to test this films sensitivity to emission nebulae.

30 minutes is a long time for f/2.8, but this result is in line with other 100 speed films in the reciprocity category.

This image still shows a little green cast that was present in the original scan. I adjusted green levels to rid most of it, so it is possible to use this film for astrophotography.

I hope this satisfies any curiosity others may have about this film.

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!
dslr, film, photography
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Help! k-x night photography HoBykoYan Troubleshooting and Beginner Help 9 02-22-2010 11:10 PM
Black & White Concert at the Starlight VaughnA Post Your Photos! 1 01-20-2010 12:41 PM
Night Photography interested_observer Photographic Technique 26 08-19-2009 03:57 AM
Night Photography on film. Mattferrit Post Your Photos! 7 08-17-2009 06:21 PM
Tandem pingflood Post Your Photos! 2 03-07-2009 06:32 PM



All times are GMT -7. The time now is 11:12 AM. | See also: NikonForums.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