Curious re: m4/3 lens diaphragm blades

Started 10 months ago | Discussions thread
ForumParentFirstPreviousNextNext unread
Flat view
Bob Tullis
Forum ProPosts: 28,260Gear list
Curious re: m4/3 lens diaphragm blades
10 months ago

I'm slightly disappointed with most well respected Panasonic or Olympus lens, which I believe is related to the amount of blades in the aperture diaphragm. But only disappointed for specific studies at night, where the character of lights in the scene are concerned.

There are a few exceptions - the 42.5 Panny and the 75mm Oly that I'm aware of. It takes at least 9 blades to start rendering light sources that aren't gritty (unless one stops down into diffraction territory). At least, as I've compared against the Voitlanders that I end up resorting to for specific studies.

It's a first world problem, granted, needing lenses of more mass (and cost) just for this character of rendering. But is that all there is to this observation? Does the sensor's pixel pitch also come into play? Is there a practical limitation involved, or is it a design/lens size/cost determination? I could get by without knowing more, but it's been a Q on my mind for a while, figured it's about time I put it out there.


Lumix 7-14/4, could just as well be the 12-40/2.8 (7 blades)

Oly 12/2 (7 blades)

Nokton 17.5/0.95 at f6.7 (9 blades)

-- hide signature --

...Bob, NYC
"Well, sometimes the magic works. . . Sometimes, it doesn't." - Chief Dan George, Little Big Man

 Bob Tullis's gear list:Bob Tullis's gear list
Panasonic Lumix DMC-GX7 Olympus E-M1 Sony Alpha 7S Carl Zeiss Distagon T* 2/35 Voigtlander 35mm F1.4 Nokton +28 more
ForumParentFirstPreviousNextNext unread
Flat view
Post (hide subjects)Posted by
ForumParentFirstPreviousNextNext unread
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow