Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-20-2016, 08:13 AM - 4 Likes   #9826
Senior Member




Join Date: Dec 2012
Location: Canberra, ACT
Posts: 147
It's been a while since my 15mm spent some time on the camera.
Took it out tonight when I saw a really cool 22 degree halo around the moon.



For anyone who wants to know, this ring surrounding the Moon is caused by the refraction of Moonlight (which is really reflected sunlight) through ice crystals suspended in the upper atmosphere between 5-10 km in altitude. Moonlight passes through one facet of the ice crystal, and is then refracted back out at exactly the angle of 22-degrees.
Why Do We Sometimes See a Ring Around the Moon? - Universe Today

05-20-2016, 08:19 AM   #9827
Pentaxian
mattb123's Avatar

Join Date: Apr 2010
Location: Colorado High Country
Photos: Gallery
Posts: 9,810
QuoteOriginally posted by cpho Quote
It's been a while since my 15mm spent some time on the camera.
Took it out tonight when I saw a really cool 22 degree halo around the moon.



For anyone who wants to know, this ring surrounding the Moon is caused by the refraction of Moonlight (which is really reflected sunlight) through ice crystals suspended in the upper atmosphere between 5-10 km in altitude. Moonlight passes through one facet of the ice crystal, and is then refracted back out at exactly the angle of 22-degrees.
Why Do We Sometimes See a Ring Around the Moon? - Universe Today
Very nice! I've found the DA15 to be just wide enough for a good lunar halo shot too.
05-20-2016, 08:25 AM   #9828
Senior Member




Join Date: Dec 2012
Location: Canberra, ACT
Posts: 147
QuoteOriginally posted by mattb123 Quote
Very nice! I've found the DA15 to be just wide enough for a good lunar halo shot too.
Cheers Matt!
I think the 15mm is perfect for the halo. The 18-135 didn't quite get the entire glow of the halo in.
Plus the 15mm comes with the bonus starburst effect too!
05-20-2016, 01:26 PM   #9829
Kiwi Pentaxian
Loyal Site Supporter
NZ_Ross's Avatar

Join Date: Mar 2012
Location: Timaru
Photos: Gallery | Albums
Posts: 3,678
QuoteOriginally posted by cpho Quote
Took it out tonight when I saw a really cool 22 degree halo around the moon.
Nice....

05-21-2016, 02:03 PM - 2 Likes   #9830
Senior Member




Join Date: May 2014
Location: Somerset, UK
Posts: 115
Gaudi's wonderful architecture in Barcelona




DA 15mm handheld with camera set to auto-bracket, then blended in Lightroom.
05-22-2016, 03:51 AM - 4 Likes   #9831
Site Supporter
Site Supporter




Join Date: Mar 2009
Location: Gladys, Virginia
Photos: Gallery
Posts: 22,858
Country Road.

05-22-2016, 04:17 AM - 1 Like   #9832
Pentaxian
gazonk's Avatar

Join Date: Feb 2009
Location: Oslo area, Norway
Photos: Gallery | Albums
Posts: 3,644
The DA15 takes control of my flower closeups... not the smooth bokeh of the DA35Ltd, but an interesting change in perspective:


05-22-2016, 01:57 PM   #9833
Site Supporter
Site Supporter
Jean Poitiers's Avatar

Join Date: Apr 2011
Location: Lost in translation ...
Photos: Gallery | Albums
Posts: 17,956
More flower close-ups ... almost doughnut bokeh ... (damn breeze)



05-22-2016, 02:15 PM   #9834
Senior Member




Join Date: Nov 2013
Posts: 258
The 15mm Limited as been on my wishlist for a long time, primarily because of all the great images in this thread. I hadn't intended to get one right now because there are other things I felt I needed more (good flash, good tripod...) but one of the SMC versions (my preference) appeared in the marketplace at a fair price and it was too much for me.

Here is a .jpg, straight from the camera with no other processing, of the dock in front of the family lake cabin (one of my favorite landscape subjects).



One question...Is it worth getting a polarizer for this lens? I know there are issues using a CPL at wide angles. B&H says this doesn't become a factor until 16mm on APS-C (24mm on FF).
05-22-2016, 05:10 PM - 3 Likes   #9835
Senior Member
Jens Lyn IV's Avatar

Join Date: Jan 2014
Location: Ringsted, Denmark
Photos: Albums
Posts: 260
QuoteOriginally posted by JimS_256 Quote
Is it worth getting a polarizer for this lens?
In my opinion, yes, unless these limitations give you pause:
  • You may get a strong gradient effect in the sky under certain circumstances.
  • A non-slim filter will intrude on the image circle (but not the central APS-C area normally occupied by the sensor; using Composition Adjust to its maximum potential will cause near-black corners).
I have not tried to penetrate reflective surfaces with my DA 15, so I cannot speak for this use case, but I assume it would work very well.

These four samples were all shot with a B&W CPL filter on the SMC DA 15 Ltd:


The gradient effect is quite subtle here.


Very little gradient effect, but extreme vignetting because I shifted the sensor all the way up to correct for converging lines. The upper left corner is not cropped and represents a worst-case scenario with my filter.


Strong gradient effect; camera pointing away from sun.


Very strong gradient effect; sun just below horizon on the left.


Edit: another reason to get one is that the 49 mm filter thread is shared with the first three M-series lenses in your signature, every other DA Limited, the DA 50-200, many FA primes, and every macro lens currently made by Pentax.

Last edited by Jens Lyn IV; 05-22-2016 at 05:33 PM.
05-23-2016, 09:33 AM - 3 Likes   #9836
Site Supporter
Site Supporter
Jean Poitiers's Avatar

Join Date: Apr 2011
Location: Lost in translation ...
Photos: Gallery | Albums
Posts: 17,956
Late this afternoon and for the Daily Challenges thread ...

05-23-2016, 09:35 AM   #9837
Pentaxian
Hattifnatt's Avatar

Join Date: Mar 2013
Photos: Gallery
Posts: 4,108
QuoteOriginally posted by Jean Poitiers Quote
Late this afternoon and for the Daily Challenges thread ...

Excellent shot Jean, perfect use of DA15.
05-23-2016, 09:36 AM   #9838
Senior Member




Join Date: Feb 2016
Location: Texas
Posts: 143
QuoteOriginally posted by Richard & Sheila Quote


DA 15mm handheld with camera set to auto-bracket, then blended in Lightroom.
Fantastico.

I have tickets for Sagrada Familia for tomorrow morning, plan to lens it with my DA 15mm LTD.

I have taken something like 1,000 photos in the last week, and probably 70% were shot with the DA 15.
05-23-2016, 12:22 PM - 4 Likes   #9839
Pentaxian
Hattifnatt's Avatar

Join Date: Mar 2013
Photos: Gallery
Posts: 4,108
More shots with the DA15.





05-24-2016, 01:26 PM - 1 Like   #9840
Senior Member




Join Date: Feb 2016
Location: Texas
Posts: 143


Spain has been an absolute dream.
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!
album, background, cheers, circles, couple, craig, elpolodiablo, exposure, flare, flickr, hd, hope, images, jmschrei, lake, lens, line, love, mind, minute, pentax lens, pm, post, ps, shot, starburst, thanks, time, version
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
The FA* 85mm REALLY controls my mind Adam Pentax SLR Lens Discussion 173 08-27-2011 04:31 PM
15mm Limited and 35mm Limited at a distance designinme_1976 Pentax SLR Lens Discussion 19 08-22-2011 10:12 PM



All times are GMT -7. The time now is 07:47 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