Cyclop lens

Analog to Helios 40/2 1.5/85mm M42 made in 1992 by Sergey-Posad.
Sold by Photo-Lubitel Sankt-Petersburg

http://www.ussrphoto.com/resize/resize_image.aspx?ImgWd=800&IptFl=/UserContent/8102017_Cyclop lens.png

http://www.ussrphoto.com/UserContent/8102017_Cyclop lens.png

It's hard to see how they can make the aperture blades fold up so small.

it has no aperture blades, always open. It belongs to the night vision NZT-1. Nice alternative to Helios-40, cheaper, but not that easy to find. There were many of them 10 years ago in Germany, probably the old Soviet Army staff.

new design for photo câmeras
https://www.ebay.com/i/112588048661?rt=nc

<blockquote id="quote"><font size="1" face="MS Trebuchet, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by rkaipov</i>
<br />it has no aperture blades, always open. It belongs to the night vision NZT-1. Nice alternative to Helios-40, cheaper, but not that easy to find. There were many of them 10 years ago in Germany, probably the old Soviet Army staff.

<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">

Ah, I see. Thanks for the info. Sorry it's taken me so long to reply, but I've been trying to find various bits and bags for my 7 cameras and running films through some of them to test them.