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Re: [OM] The "Summer Barn"

Subject: Re: [OM] The "Summer Barn"
From: Moose <olymoose@xxxxxxxxx>
Date: Sat, 16 Jan 2021 16:57:58 -0800
On 1/3/2021 6:30 PM, Mike Gordon via olympus wrote:
<<When I read a review of a lens that points out what nice sunstars it makes, I wonder 
where I can find the one that doesn't make them at all. 😂


Understood.  Yes, it is an artefact, but a fun and sometimes attractive one.  
My CV 40/1.2 produces huge well defined large sunstars at the drop of a 
hat---too much of one spice can spoil the soup.  It is not the right lens for 
many situations as a result. Sometimes I like the effect especially in 
nightscapes or low angle sun peeping out from an obstruction.  The OMZ 50-250 
has straight aperture blades and has decent sunstars.

I honest to goodness don't know which of my lenses produce what sort of 
sunstars.


Remember this shot?

http://zone-10.com/tope2/main.php?g2_itemId=5864

I do, and I still like it. I'll cop out by noting that those are not "Sun" 
stars.

I think I may be  a 4-5/10 on the sunstar fan scale whereas Moose may be a 1.  
Curiously the CV 50/f2 apo  has a virtually round aperture shape at F2 AND F2.8 
but polygonal with defined sunstars after that. It keeps the bokeh better at 
wide apertures.  A nice review of sunstar effects:

https://phillipreeve.net/blog/best-lenses-for-sunstars/

And here's what happens with a pure circle aperture. 
<https://photos.app.goo.gl/oYsosaJjjvVDc1x4A>

Either Spiratone Portragon 100/4 or Spiratone YS 85/1.8. Neither has a 
diaphragm.

Roundly Moose

--
What if the Hokey Pokey *IS* what it's all about?
--
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