strange circular light bokeh?

platinum · 11-30-2008, 11:02 AM

a lot ot time ago i saw a particular photo:
lights in bokeh were "circular".
very strange but nice.

i remeber only that it was a m42 lens.

can help me to find this lens?

stevebrot · 11-30-2008, 11:32 AM

You mean something like this:

https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/42795-my-jupit...herman999.html

Any lens with a larger number of curved aperture blades will show a circular pattern for specular highlights. In the above case, it was the Jupiter-9.

Steve

platinum · 11-30-2008, 11:36 AM

hello stevebrot,

i know very well Jupiter-9.

it was another lens.

and the circular lights in bokeh were very very very strange!

i don't remember the name...

SpecialK · 11-30-2008, 11:42 AM

Maybe a mirror lens which produces donut highlights? This was a Sigma 600.
Attachment 23208

Last edited by SpecialK; 06-29-2016 at 09:34 PM.

platinum · 11-30-2008, 01:41 PM

Originally posted by SpecialK

Maybe a mirror lens which produces donut highlights? This was a Sigma 600.
Attachment 23208

it is a little similar, but it was not a mirror lens

m8o · 11-30-2008, 07:48 PM

the 3rd photo in this link? :: https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/39840-cosina-5...tml#post400391 ?

haystack · 11-30-2008, 10:45 PM

Hi! Maybe this is what you're looking for
https://www.pentaxforums.com/forums/314202-post57.html
..and it comes from Helios-40.

stevebrot · 11-30-2008, 11:00 PM

For the OP...Can you remember any details of any example pictures that were posted? I think I remember something similar to what you describe, but am not sure that I saw it posted here.

Steve

platinum · 12-01-2008, 01:56 AM

i remeber only that it was a m42 lens. i'm sure.
i saw a photo not in this forum, but in the web.

it is not Helios-40 and it is not Cosina 55mm f1.2.

lights in bokeh were circular: nice and perfect circumferences!
and the circumference's perimeter (=border line of circumference area) was +brillant than the center area.

m8o · 12-01-2008, 09:34 AM

I recall a lovely photo of blue (red?) lights in the OF area that did that. I can't find it.

stevebrot · 12-01-2008, 12:04 PM

Originally posted by m8o

I recall a lovely photo of blue (red?) lights in the OF area that did that. I can't find it.

That is what I remember as well and I also could not find it.

hinman · 12-01-2008, 12:52 PM

I used Pentax A 50mm f/1.7 with Pentax F-1.7x AF TC and I shoot this as a 85mm f/2.8 in the combination and I do see some circular bokehs. You may not like the sharp edge bokeh as compared to others that are softer. But I don't mind this as I like things that are different and unique and I prefer for sharpness on a lens over the soft bokeh and hence I like both of my 50mm with FA and A for different purposes

Pentax A 50mm f/1.7

Pentax F-1.7x AF TC

#1

#2

#3

More test shots

m8o · 12-01-2008, 01:03 PM

hahaha! yes!

thanx hinman, having just used my newly acquired 50/1.4-A w/the 1.7x TC yesterday, it should have occurred to me. Well, that's what I remembered. But it's not an M42 lens so likely not the same for you platinum.

farfisa · 12-01-2008, 01:43 PM

This is from the jupiter 9 post, but thePiRaTE!! has a photo from a Meyer-Gorlitz Trioplan, which is an M42 lens.

https://www.pentaxforums.com/forums/405822-post24.html

There's also a Takumar 58/2.4 shot which might be it:
https://www.pentaxforums.com/forums/247575-post13.html

Was it on this forum?

hinman · 12-01-2008, 02:26 PM - **1 Like**

there are lots of lens that have circular bokeh. Sometime, it appears to depend on the light sources too.

If you are specific on the M42 lens, I recommend the Vivitar 28mm f/2.5 from Kiron. Though it may not be the best in old 28mm lens, it is easy to find both in K mount and M42 mount for about $20 to $50 in price range.

The lens has 67mm filter size and it requires a good lens hood to guard against flare. These few shots are done with circular rings in the K version, I assume similar bokeh and number of blades, design, optics in the M42 older version

Vivitar 28mm f/2.5 from Kiron

subtle but you can see the circular rings

Vivitar 28mm f/2.5 from Kiron

In general, I would recommend K lens over M42 with exceptions on finding a lens for cheaper cost or something that is unique in the M42 lens collection and not found in K mount. The Jupiter9, many Russian lens, Carl Zeiss are among the exceptions in my list. But like the Kiron and Komine lens, if I find the K mount with a reasonable price, I always opt for the K version for few obvious reasons:

No need for M42 adapter
Easier to sell or trade for later upgrade
Newer lens with less wear, marks, scratches, fungus and others
Higher retained resale value

12-01-2008, 12:52 PM	#12
hinman Veteran Member Join Date: Oct 2006 Location: Fremont, CA Photos: Albums Posts: 3,473	I used Pentax A 50mm f/1.7 with Pentax F-1.7x AF TC and I shoot this as a 85mm f/2.8 in the combination and I do see some circular bokehs. You may not like the sharp edge bokeh as compared to others that are softer. But I don't mind this as I like things that are different and unique and I prefer for sharpness on a lens over the soft bokeh and hence I like both of my 50mm with FA and A for different purposes Pentax A 50mm f/1.7 Pentax F-1.7x AF TC #1 #2 #3 More test shots Last edited by hinman; 12-01-2008 at 03:18 PM.

12-01-2008, 02:26 PM - 1 Like	#15
hinman Veteran Member Join Date: Oct 2006 Location: Fremont, CA Photos: Albums Posts: 3,473	there are lots of lens that have circular bokeh. Sometime, it appears to depend on the light sources too. If you are specific on the M42 lens, I recommend the Vivitar 28mm f/2.5 from Kiron. Though it may not be the best in old 28mm lens, it is easy to find both in K mount and M42 mount for about $20 to $50 in price range. The lens has 67mm filter size and it requires a good lens hood to guard against flare. These few shots are done with circular rings in the K version, I assume similar bokeh and number of blades, design, optics in the M42 older version Vivitar 28mm f/2.5 from Kiron subtle but you can see the circular rings Vivitar 28mm f/2.5 from Kiron In general, I would recommend K lens over M42 with exceptions on finding a lens for cheaper cost or something that is unique in the M42 lens collection and not found in K mount. The Jupiter9, many Russian lens, Carl Zeiss are among the exceptions in my list. But like the Kiron and Komine lens, if I find the K mount with a reasonable price, I always opt for the K version for few obvious reasons: No need for M42 adapter Easier to sell or trade for later upgrade Newer lens with less wear, marks, scratches, fungus and others Higher retained resale value

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11-30-2008, 11:02 AM	#1
platinum Senior Member Join Date: Apr 2008 Posts: 269	strange circular light bokeh? a lot ot time ago i saw a particular photo: lights in bokeh were "circular". very strange but nice. i remeber only that it was a m42 lens. can help me to find this lens?

11-30-2008, 11:32 AM	#2
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	You mean something like this: https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/42795-my-jupit...herman999.html Any lens with a larger number of curved aperture blades will show a circular pattern for specular highlights. In the above case, it was the Jupiter-9. Steve

11-30-2008, 11:36 AM	#3
platinum Senior Member Join Date: Apr 2008 Posts: 269 Original Poster	hello stevebrot, i know very well Jupiter-9. it was another lens. and the circular lights in bokeh were very very very strange! i don't remember the name...

11-30-2008, 11:42 AM	#4
SpecialK Pentaxian Join Date: Dec 2006 Location: So California Photos: Gallery Posts: 16,480	Maybe a mirror lens which produces donut highlights? This was a Sigma 600. Attachment 23208 Last edited by SpecialK; 06-29-2016 at 09:34 PM.

11-30-2008, 01:41 PM	#5
platinum Senior Member Join Date: Apr 2008 Posts: 269 Original Poster	Originally posted by SpecialK Maybe a mirror lens which produces donut highlights? This was a Sigma 600. Attachment 23208 it is a little similar, but it was not a mirror lens

11-30-2008, 07:48 PM	#6
m8o Veteran Member Join Date: Jul 2007 Location: 40°-55'-44" N / 73°-24'-07" W [on LI] Photos: Gallery \| Albums Posts: 3,092	the 3rd photo in this link? :: https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/39840-cosina-5...tml#post400391 ?

11-30-2008, 10:45 PM	#7
haystack New Member Join Date: Apr 2008 Location: Poland Photos: Gallery Posts: 24	Hi! Maybe this is what you're looking for https://www.pentaxforums.com/forums/314202-post57.html ..and it comes from Helios-40.

11-30-2008, 11:00 PM	#8
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	For the OP...Can you remember any details of any example pictures that were posted? I think I remember something similar to what you describe, but am not sure that I saw it posted here. Steve

12-01-2008, 01:56 AM	#9
platinum Senior Member Join Date: Apr 2008 Posts: 269 Original Poster	i remeber only that it was a m42 lens. i'm sure. i saw a photo not in this forum, but in the web. it is not Helios-40 and it is not Cosina 55mm f1.2. lights in bokeh were circular: nice and perfect circumferences! and the circumference's perimeter (=border line of circumference area) was +brillant than the center area.

12-01-2008, 09:34 AM	#10
m8o Veteran Member Join Date: Jul 2007 Location: 40°-55'-44" N / 73°-24'-07" W [on LI] Photos: Gallery \| Albums Posts: 3,092	I recall a lovely photo of blue (red?) lights in the OF area that did that. I can't find it.

12-01-2008, 12:04 PM	#11
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by m8o I recall a lovely photo of blue (red?) lights in the OF area that did that. I can't find it. That is what I remember as well and I also could not find it.

12-01-2008, 01:03 PM	#13
m8o Veteran Member Join Date: Jul 2007 Location: 40°-55'-44" N / 73°-24'-07" W [on LI] Photos: Gallery \| Albums Posts: 3,092	hahaha! yes! thanx hinman, having just used my newly acquired 50/1.4-A w/the 1.7x TC yesterday, it should have occurred to me. Well, that's what I remembered. But it's not an M42 lens so likely not the same for you platinum.

12-01-2008, 01:43 PM	#14
farfisa Veteran Member Join Date: Nov 2008 Location: Toronto, Canada Photos: Gallery Posts: 1,274	This is from the jupiter 9 post, but thePiRaTE!! has a photo from a Meyer-Gorlitz Trioplan, which is an M42 lens. https://www.pentaxforums.com/forums/405822-post24.html There's also a Takumar 58/2.4 shot which might be it: https://www.pentaxforums.com/forums/247575-post13.html Was it on this forum?