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A different 8mm movie lens ... Kohka
Lens: Kohkanon 8.5-34mm f/1.2 Camera: K-5 Photo Location: Poitiers ISO: 100 Shutter Speed: 1/250s Aperture: F1.2 
Posted By: Jean Poitiers, 11-03-2014, 01:55 AM

Another converted 8mm movie lens ... kind of "artsy" and still "under development" hoping for a better IQ ... ha !





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11-03-2014, 02:22 AM   #2
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Interesting. A bit soft, or was that intentional?
11-03-2014, 04:27 AM   #3
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I like this kind of experiments. Managing an "unpredictable" lens always leads to out of common results. It requires a lot of patience and dedition to find the way to make it artistic and not just low definition. This picture shows a good point to start from! Keep on shoting and posting the results!
11-03-2014, 04:57 AM   #4
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QuoteOriginally posted by MarkJerling Quote
Interesting. A bit soft, or was that intentional?
Bonjour,

Well, yeah ... it's soft for the moment. This is about all I have gotten out of this lens via its first major modifications.

This particular 8mm movie lens was a bit difficult, but the shallow DOF and inherent softness may give it an "effect".

I will put up some other images later. Salut, J

---------- Post added 11-03-14 at 13:01 ----------

QuoteOriginally posted by flaviopetrone Quote
I like this kind of experiments. Managing an "unpredictable" lens always leads to out of common results. It requires a lot of patience and dedition to find the way to make it artistic and not just low definition. This picture shows a good point to start from! Keep on shoting and posting the results!
Thanks ... and I rarely have a firm idea as to what kind of image that I will get, if any image at all.

It's a lot of fun for me to experiment and do this weird stuff.

And thankfully I have a great thrift store nearly where I can pick up a lot of "guinea pigs" for little cost; plus I do a few "boot sales" as well.

Salut, J

11-03-2014, 05:01 AM   #5
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Is the softness about focus....? Or is because it is wide open? I am loving the way you are a mad scientist with lenses exploring all these possibilities and searching for the magic of these rare lenses.....
11-03-2014, 05:08 AM   #6
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QuoteOriginally posted by phoenixvision Quote
Is the softness about focus....? Or is because it is wide open? I am loving the way you are a mad scientist with lenses exploring all these possibilities and searching for the magic of these rare lenses.....
Bonjour,

Merci! More than likely it's due to being permanently wide open ... there is no aperture. And the focus can be a challenge, too ... here I was very near or @ MFD.

I have used rubber circular washers/grommets at the end of the lens to mimic an aperture ... sometimes that helps a bit.

Kind of like this, but this image below is a "rough-cut" test to try to stop down a (different) video lens.

Salut, J

11-03-2014, 12:26 PM   #7
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Oh, wow! That's an interesting modification!
11-03-2014, 02:32 PM   #8
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QuoteOriginally posted by MarkJerling Quote
Oh, wow! That's an interesting modification!
It is !
Bookmarked.
O-rings, very clever.
(We should point GUB to this one ...)

11-03-2014, 02:41 PM   #9
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QuoteOriginally posted by bobD Quote
It is !
Bookmarked.
O-rings, very clever.
(We should point GUB to this one ...)
Thanks ... I use flat plumbing washer, too. From a large "kit box" with varying diameters that will fit snuggly inside one another ... works well.
11-03-2014, 03:23 PM   #10
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QuoteOriginally posted by bobD Quote
It is !
Bookmarked.
O-rings, very clever.
(We should point GUB to this one ...)
You're right. But he may weld something to it!
11-03-2014, 03:27 PM   #11
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I think the softness work. Would be nice to have just a touch more sharpness to highlight the insect, but the
flowers look gorgeous as is.
11-03-2014, 03:33 PM   #12
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QuoteOriginally posted by tvdtvdtvd Quote
I think the softness work. Would be nice to have just a touch more sharpness to highlight the insect, but the
flowers look gorgeous as is.
Thanks for your comment ...

Oui
, bit bit sharper and a bit more DOF would be nice. I need to play around with this on so more ... Salut, J
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