Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-29-2016, 09:36 PM   #16
Loyal Site Supporter
clackers's Avatar

Join Date: Jul 2013
Location: Melbourne
Photos: Albums
Posts: 8,879
QuoteOriginally posted by stevebrot Quote
Th

As for legacy glass: Pentax FA* 24/1.8

f2 rather than f1.8?

05-29-2016, 10:03 PM   #17
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 27,263
QuoteOriginally posted by clackers Quote
f2 rather than f1.8?
Yes...f/2 Thanks for the kick!

Steve
05-30-2016, 03:43 AM   #18
Pentaxian




Join Date: May 2010
Location: Sydney
Posts: 499
Original Poster
Thanks everyone for the input. Very useful!

The usage I have in mind is Milky Way photography making use of the K1's astrotracking capability. I'm aiming for the ability to do it without stitching, or not much anyway, which requires a very wide field of view. Ideally a wide aperture also helps control noise by reducing required ISO, though of course the astrotracking allows longer exposures without trailing (though very low ISOs will remain out of reach, as the function starts to reach its precision limit in exposure duration - so lens speed is still a consideration).

In the end, I can stitch more of course, but would be nice not to have to.

If I want to achieve super high quality, UWA and high speed, it seems the lenses don't yet exist for the K1.
05-30-2016, 04:06 AM   #19
Pentaxian
D1N0's Avatar

Join Date: May 2012
Location: ---
Photos: Gallery
Posts: 4,259
QuoteOriginally posted by Ed Hurst Quote
Thanks everyone for the input. Very useful!

The usage I have in mind is Milky Way photography making use of the K1's astrotracking capability. I'm aiming for the ability to do it without stitching, or not much anyway, which requires a very wide field of view. Ideally a wide aperture also helps control noise by reducing required ISO, though of course the astrotracking allows longer exposures without trailing (though very low ISOs will remain out of reach, as the function starts to reach its precision limit in exposure duration - so lens speed is still a consideration).

In the end, I can stitch more of course, but would be nice not to have to.

If I want to achieve super high quality, UWA and high speed, it seems the lenses don't yet exist for the K1.
Nor for other brands on full frame. There is the Sigma 20mm F1.4 and the Nikon 20mm F1.8 But nothing below 20mm. The Samyang 16mm F2 is an aps-c lens. F2.8 is the brightest you will get in the 14-19mm range (apart from the Irix which is 2.4). Your best bets for astrography would be the yet to be launched Irix or the Samyang 14mm F2.8 which is a steal. (Here's a review: http://www.lonelyspeck.com/rokinon-14mm-f2-8-review/ )


Last edited by D1N0; 05-30-2016 at 04:12 AM.
05-30-2016, 04:10 AM   #20
Pentaxian




Join Date: Apr 2007
Location: Sweden
Posts: 1,927
Look into Samyangs wide lenses, they are supposedly very good when it comes to astrophotography.
05-30-2016, 06:08 AM   #21
Pentaxian




Join Date: May 2010
Location: Sydney
Posts: 499
Original Poster
QuoteOriginally posted by D1N0 Quote
Nor for other brands on full frame. There is the Sigma 20mm F1.4 and the Nikon 20mm F1.8 But nothing below 20mm. The Samyang 16mm F2 is an aps-c lens. F2.8 is the brightest you will get in the 14-19mm range (apart from the Irix which is 2.4). Your best bets for astrography would be the yet to be launched Irix or the Samyang 14mm F2.8 which is a steal. (Here's a review: Rokinon 14mm f/2.8 IF ED UMC Review – Lonely Speck )
I'd settle for a K1 compatible version of the Nikon 14-24 f2.8 or Tamron 15-30 f2.8 to be honest. Either outperforms the Samyang/Rokinon I believe...? Out to FF corners anyway...
05-30-2016, 06:17 AM   #22
Pentaxian
D1N0's Avatar

Join Date: May 2012
Location: ---
Photos: Gallery
Posts: 4,259
QuoteOriginally posted by Ed Hurst Quote
or Tamron 15-30 f2.8
There is one: HD Pentax-D FA 15-30mm F2.8 ED SDM WR Reviews - D FA Zoom Lenses - Pentax Lens Reviews & Lens Database
05-30-2016, 06:37 AM   #23
Pentaxian




Join Date: May 2010
Location: Sydney
Posts: 499
Original Poster
Thanks for that. Had rejected that option for its poor corner performance...

05-30-2016, 06:39 AM   #24
Pentaxian




Join Date: Jan 2010
Location: Hoevelaken
Photos: Gallery
Posts: 892
QuoteOriginally posted by Ed Hurst Quote
Thanks for that. Had rejected that option for its poor corner performance...
You like the Tamron version but not the Pentax one? Thats weird, its the same lens. The Pentax version is a rebadged Tamron (with better coatings e.d)

---------- Post added 30th May 2016 at 15:58 ----------

there is a Zeiss Distagon 15/2.8 in M42 available. That should fit and work.
05-30-2016, 03:36 PM   #25
Site Supporter




Join Date: Sep 2014
Photos: Albums
Posts: 874
Wouldn't the distagon be more susceptible to coma though?
05-30-2016, 03:43 PM   #26
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 42,781
QuoteOriginally posted by Ed Hurst Quote
Thanks for that. Had rejected that option for its poor corner performance...
The corners aren't any worse than say the 24-70mm at 70mm. The reason people complain is mainly field curvature. Since the astrotracer will likely soften your corners regardless, I wouldn't consider this to be an issue- plus the lens is extremely sharp otherwise.

That said, overall the Pentax lineup is still missing fast ultra wide prime options, but if you look at Nikon many of theirs were also just added recently.

Adam
PentaxForums.com Webmaster (Site Usage Guide | Site Help | My Photography)



PentaxForums.com's high server and development costs are user-supported. You can help cover those costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

05-31-2016, 08:22 AM   #27
osv
Pentaxian




Join Date: Mar 2007
Location: So Cal
Photos: Gallery
Posts: 2,080
QuoteOriginally posted by Ed Hurst Quote
Thanks everyone for the input. Very useful!

The usage I have in mind is Milky Way photography making use of the K1's astrotracking capability.
Tamron 15-30 mm f/2.8 Di VC USD review - Coma, astigmatism and bokeh - LensTip.com
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!
24x36mm, full-frame, k1, options, pentax, tamron, version, wides
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Sigma EF-610 DG Super on K1 emsee Pentax Camera and Field Accessories 14 03-12-2017 08:39 AM
The case for a fast super wide Ed Hurst Pentax Medium Format 35 03-02-2016 04:05 PM
DxO and ultra-wides for Pentax... causey Pentax SLR Lens Discussion 10 11-01-2010 08:50 PM
What's the best of these 3 super-wides: Sigma 10-20, Pentax 14, or Pentax 12-24? Grimlock Pentax SLR Lens Discussion 55 07-05-2009 09:01 PM
Best short FAST zoom lens for K100 Super audio_mad Pentax SLR Lens Discussion 3 03-02-2009 12:24 PM



All times are GMT -7. The time now is 06:38 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