Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
01-29-2014, 01:20 PM   #1
Pentaxian
EarlVonTapia's Avatar

Join Date: Oct 2012
Location: Vancouver
Photos: Gallery
Posts: 1,150
The best "Milky Way" lens is the Samyang 16mm F2?

A neat article was posted on PetaPixel today.

How-To: Picking a Great Lens for Milky Way Photography

It goes really in depth in a way I hadn't read before.

What was most interesting to me is the chart about 2/3rds of the way down that gives an Astro rating to each lens.

http://petapixel.com/assets/uploads/2014/01/milkyway6.jpg

Looks like it's a 24mm f1.4 on a Full Frame.

Just going by what would be the closest equivalent of that on APS-C for Pentax, is that the SamBoRokiVivinon 16mm f2?

01-29-2014, 01:42 PM   #2
Site Supporter
jimr-pdx's Avatar

Join Date: May 2010
Location: 1hr north of PDX
Photos: Gallery | Albums
Posts: 3,515
Good stuff, and the shutter-speed demo is a very clear explanation of star trails.
I liked my Sigma 15/2.8 fisheye, but I didn't use it often. I now have the Samyang&c 8mm fisheye, hoping to use it more in the dry season.
01-29-2014, 02:37 PM   #3
Veteran Member
Kendigitize's Avatar

Join Date: Apr 2013
Photos: Gallery
Posts: 316
Great article!

Thanks for posting this! I was in the middle of setting up everything for shots of the stars tonight and this confirms most of the settings I have arrived at thru trial & error. I use my 18-55 kit lens because it's all I have in the 18-24 range and 15sec is about the exp. I use at f3.5. I have tried the DA35 2.4, but never been very happy with the results. My best results come from my fa50 1.4 with a 10sec exp, but the field of view is cut in half and I tend to miss most of the meteors I see at night. I had planned on picking up a 24mm sigma specificly for astro photography, and now this confirms it.
I'm going to try out the Q with 01 lens tonight too and see what results I get.

FYI: Here are the links to stargazing info I use to determine the best times and nights for viewing:
Stargazing Information | StarDate Online
American Meteor Society

This photo was taken with the 50mm during the last major shower:


Last edited by Kendigitize; 01-29-2014 at 03:57 PM.
01-29-2014, 02:40 PM   #4
Veteran Member
Kendigitize's Avatar

Join Date: Apr 2013
Photos: Gallery
Posts: 316
QuoteOriginally posted by EarlVonTapia Quote
SamBoRokiVivinon 16mm f2
Just got this, LMAO

01-29-2014, 03:57 PM   #5
Pentaxian
Na Horuk's Avatar

Join Date: Feb 2012
Location: Slovenia, probably
Photos: Gallery | Albums
Posts: 10,612
Thanks for sharing that link. I have the Samyang 14mm f2.8 and it great for astrophotography because you can use a very long exposure. But it has some problems.
Because it is 14mm, the stars are very tiny. 16mm might be a more convenient range.
The other problem is QC. I returned my first copy of the 14mm. The second one is better, but still suffers some lens decentering. This becomes apparent especially with stars, because stars on the left side of the photo are not nice points, but are slightly blurred.

Samyang also makes a 24mm f1.4 lens btw. And the Pentax astrotracer GPS thingy can allow even the use of a relatively slow lens, even without a fancy tripod
01-29-2014, 04:37 PM   #6
Pentaxian
EarlVonTapia's Avatar

Join Date: Oct 2012
Location: Vancouver
Photos: Gallery
Posts: 1,150
Original Poster
Hmm, I might be wrong about this, but based on the information provided in the advanced spreadsheet that was linked to in the article, my understanding is that the best lens for Astroscaping in full frame OR APS-C is the Samyang 24mm f1.4.

https://docs.google.com/spreadsheet/ccc?key=0AomVJ2lbrwb1dDRGeHJOaVZfYnlFR2Z...=sharing#gid=2
01-29-2014, 04:48 PM - 2 Likes   #7
Pentaxian
mattb123's Avatar

Join Date: Apr 2010
Location: Colorado High Country
Photos: Gallery
Posts: 7,321
My favorites are the DA 15/4 and Rokinon 8mm/3.5
Neither are all that fast but they get the job done and are nice and wide for trying to catch meteors.
I have also used a A 50/1.7 which works well but is too long IMO.

DA 15


Rokinon 8mm
01-29-2014, 05:00 PM   #8
Pentaxian




Join Date: Mar 2010
Location: SW Washington
Posts: 814
QuoteOriginally posted by EarlVonTapia Quote
Hmm, I might be wrong about this, but based on the information provided in the advanced spreadsheet that was linked to in the article, my understanding is that the best lens for Astroscaping in full frame OR APS-C is the Samyang 24mm f1.4.
The problem is, 24mm on APS-C is not particularly wide, and for Milky Way shots you want as wide as you can get without sacrificing too much aperture (especially if you want a landscape in the foreground). If you ever get the chance to go to a really dark location, like the mountains on a clear night, you can see that the main band of the Milky Way spans across almost the entire sky. 24mm on APS-C only gets you a small portion.


Last edited by Cannikin; 01-29-2014 at 05:10 PM.
01-29-2014, 06:06 PM   #9
Loyal Site Supporter




Join Date: Jun 2009
Location: Tumbleweed, Arizona
Photos: Gallery | Albums
Posts: 5,048
Does anyone know or have a link to the maximum "tracking" times for the O-GPS1? When it first came out, Pentax had a website that had some sample images along with some sample times for a range of focal lengths. I believe that the longest was something like 5 minutes for the widest angle and 30 seconds or so for the 300mm. I have gone looking for it and it appears to have been swept up in Ricoh's rebranding of all the Pentax websites.

At 5 minutes of exposure time, that would amplify the "astrophoto" ratings of the wider lenses.

01-29-2014, 06:50 PM   #10
Veteran Member
VisualDarkness's Avatar

Join Date: Nov 2011
Location: Uppsala, Sweden
Photos: Gallery
Posts: 4,440
My Sigma 20/1.8 is really good then!
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!
16mm, k-mount, lens, pentax lens, samyang 16mm, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
The Metabones "speed booster" is on the way! The telecompressor lives! barondla Pentax Q 3 01-15-2013 04:44 PM
Suggestion "Price History" in Lens Reviews is misleading (at best) cheekygeek Site Suggestions and Help 7 02-15-2012 10:36 AM
What is the "best" flash for a Pentax K20D? rsthelens Troubleshooting and Beginner Help 7 10-15-2009 09:44 PM
And the best "normal" Pentax lens is... FHPhotographer Pentax SLR Lens Discussion 6 08-04-2008 04:17 PM



All times are GMT -7. The time now is 07:08 AM. | 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