Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
07-07-2017, 04:06 PM   #16
Na Horuk's Avatar

Join Date: Feb 2012
Location: Slovenia, probably
Photos: Gallery | Albums
Posts: 11,183
QuoteOriginally posted by timw4mail Quote
Okay, the shape for the majority of the aperture range. A lot of lenses have odd aperture shapes for the first few stops. My point with aperture shapes is more the (stock) shape the diaphragm inside the lens makes, moreso than the bokeh, although the two are obviously closely related.
You are right, number of aperture blades is an important factor. Just wanted to complete the list

Here is an example of the 'starry hexagon' of M 50mm f1.7: Cosmic fly by Stolpulus II - Photo 10557733 / 500px
And here is the same lens at a different aperture: Winter blast by Stolpulus II - Photo 213631541 / 500px

Hope you get the info you need!

07-07-2017, 04:22 PM   #17
Site Supporter
Loyal Site Supporter
Sandy Hancock's Avatar

Join Date: Feb 2012
Location: Adelaide Hills, South Australia
Photos: Gallery | Albums
Posts: 9,238
The DA15 and DA21 limiteds both have seven blades. I'm sure it's one of the reasons their starbursts are so revered.
07-07-2017, 05:12 PM   #18
Site Supporter
Site Supporter

Join Date: Nov 2015
Photos: Albums
Posts: 2,104
There were some cheap compact film cameras as well some Polaroids that made what I'll call an oblique four-pointed highlight.

Sometimes lens flares in those cameras were interpreted as photographs of angels or other benevolent spirits...


  • 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!
aperture, k-mount, pentax lens, shapes, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Project 52 PROJECT 52-8-19 - SHAPES-Curves noelcmn Weekly Photo Challenges 11 05-16-2016 06:19 AM
Project 52 PROJECT 52-8-18 - SHAPES-Spirals noelcmn Weekly Photo Challenges 12 05-09-2016 02:29 AM
Weekly Challenge Weekly Challenge # 328 Shapes, Lines & Patterns wissink Weekly Photo Challenges 31 09-27-2015 05:33 PM
Project 52 WINNERS: PROJECT 52-6-24-SHAPES-Circles, spheres and round shapes mtux Weekly Photo Challenges 25 08-11-2014 01:39 AM
Project 52 PROJECT 52-6-24-SHAPES-Circles, spheres and round shapes noelcmn Weekly Photo Challenges 11 08-04-2014 05:49 AM

All times are GMT -7. The time now is 11:54 PM. | See also:, 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?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]