Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
  #1
Night Train
Lens: Sigma 30mm F1.4 EX DC Camera: Pentax K-5 Photo Location: Ringsted, Denmark ISO: 80 Shutter Speed: Above 6s Aperture: F1.4 
Posted By: Jens Lyn IV, 09-14-2014, 03:18 PM

I used composition adjust to work around the soft edges of the old Sigma 30mm F1.4, shifting the sensor right to maximise sharpness on the left.


K-5 w/ Sigma 30mm F1.4 EX DC @ f/1.4, 30 s, ISO 80. Tonemapped in Luminance HDR.
Views: 735
09-14-2014, 05:24 PM   #2
Veteran Member




Join Date: Aug 2014
Posts: 407
Very interesting. I like it! What did you mean by shifting the sensor? Pardon me if that is a noobish question or just because I have no idea how to use that feature (though it doesn't sound like one my K-x would have)
09-14-2014, 05:42 PM   #3
Senior Member
Jens Lyn IV's Avatar

Join Date: Jan 2014
Location: Ringsted, Denmark
Photos: Albums
Posts: 260
Original Poster
The Shake Reduction system compensates for camera shake by moving the sensor during exposure. Composition Adjust allows the user to manually move the sensor so it is no longer centered behind the lens. This can be used to correct for perspective distortion, much like a tilt/shift lens, only here we're moving the sensor instead. This is also how a technical view camera works.

I wanted to place the centre of the lens closer to the left edge of the image, where the most sharpness-critical elements are. The old Sigma 30mm is notorious for its exceptional centre sharpness and very soft edges at f/1.4.
09-14-2014, 05:47 PM   #4
Veteran Member




Join Date: Aug 2014
Posts: 407
I knew the sensor moved for SR purposes and dust removal, but did not know this could actually be done that simply. I just looked it up and apparently it started with the K7, so that would explain why I have never seen that option on my K-x. All the more reason to get a 5iis or a K3 down the road

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!
30mm, camera, f1.4, light streaks, long exposure, night, photo, sigma, train
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Night Night Train zedone Pentax K-3 Photo Contest 1 05-31-2014 06:50 AM
Landscape Night train jon404 Post Your Photos! 7 04-05-2013 10:25 PM
Night Train james458 Monthly Photo Contests 0 05-10-2012 10:18 PM
Machinery Night Train Bob Harris Post Your Photos! 6 10-04-2011 06:30 PM



All times are GMT -7. The time now is 10:13 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