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Soviet RO-109-1A 50/1.2 with internal iris
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PostPosted: Fri Oct 21, 2016 9:34 pm    Post subject: Soviet RO-109-1A 50/1.2 with internal iris Reply with quote
Hello!

A friend in Ukraine made this modification for projection lens RO-109-1A 50/1.2.
Original lens is just a lens block, like every projection lens.
He made a mount, a focus ring, integrated iris inside the lens, naturely with apperture ring.

Lens is more an effect lens than a real lens. It's an interesting lens to use for close up. Diaphragme add sharpness, controle of DoF and everything a diaph usualy do. It doesn't turn this lens into a real serious lens, but it still increase the quality of this lens, but doesn't remove its caracter.

Some photos of the lens, and some samples I snaped with Nex-3 (first gen, 12MP)











Samples





















PostPosted: Fri Oct 21, 2016 9:44 pm    Post subject: Reply with quote
Good stuff!


PostPosted: Fri Oct 21, 2016 10:24 pm    Post subject: Reply with quote
Like 1


PostPosted: Sat Oct 22, 2016 6:47 am    Post subject: Reply with quote
Like 1


PostPosted: Sat Oct 22, 2016 7:18 am    Post subject: Reply with quote
it looks very usable Like 1


PostPosted: Sat Oct 22, 2016 8:32 am    Post subject: Reply with quote
Looks good!


PostPosted: Sat Oct 22, 2016 3:01 pm    Post subject: Reply with quote
Some very nice shots..... Like 1


PostPosted: Sat Oct 22, 2016 4:45 pm    Post subject: Reply with quote
WRONG THREAD ! hmph Nice sork. Very impressive results.

Last edited by jamaeolus on Sat Oct 22, 2016 6:47 pm; edited 1 time in total


PostPosted: Sat Oct 22, 2016 5:29 pm    Post subject: Reply with quote
That's really cool. I dig the custom machined focus mechanism (I'm a mechanical engineer in optics and lasers, so that is right up my alley). Good shots too!

Like 1 small


PostPosted: Mon Oct 24, 2016 1:47 am    Post subject: Reply with quote
The blades looks like taken from Soviet lens, definetely not from new Chinese made.
Well adaptation and results


PostPosted: Mon Oct 24, 2016 9:46 am    Post subject: Reply with quote
Thanks for your comments!

IAZA, yes, certainly from soviet lens, but I don't know which one. In fact, he uses different ones. I'll receive other exemplars for sale, they all have different diaphragmes.


PostPosted: Mon Oct 24, 2016 8:39 pm    Post subject: Reply with quote
Nicely done.


PostPosted: Tue Oct 25, 2016 12:33 am    Post subject: Reply with quote
BurstMox wrote:
Thanks for your comments!

IAZA, yes, certainly from soviet lens, but I don't know which one. In fact, he uses different ones. I'll receive other exemplars for sale, they all have different diaphragmes.

I checked my Helios 53/1,8.. looks similar


PostPosted: Tue Oct 25, 2016 5:33 pm    Post subject: Reply with quote
IAZA wrote:
BurstMox wrote:
Thanks for your comments!

IAZA, yes, certainly from soviet lens, but I don't know which one. In fact, he uses different ones. I'll receive other exemplars for sale, they all have different diaphragmes.

I checked my Helios 53/1,8.. looks similar


Oh, no, Helios 103 has very different diaphragm shape.


PostPosted: Wed Oct 18, 2017 9:50 am    Post subject: Reply with quote
Sorry to revive a old thread but I want to do the same thing to my copy of the same lens. Could you share what lens did he borrow the Iris (aperture blades) from?


PostPosted: Wed Oct 18, 2017 11:06 am    Post subject: Reply with quote
Hi Andy,

I'm sorry, I have no idea. I just can tell you he used several irises, not only one type. Here is another RO-109-1a with another diaphragm (this one can totaly close the light)

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