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Cyclop - The One-Eyed Monster
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PostPosted: Tue Nov 24, 2009 10:33 pm    Post subject: Reply with quote
Mal1905 wrote:
Orio wrote:
Isn't the Cyclop, a Helios-40 basically?


It is indeed - rumour has it that the Helios-40 units that didn't pass "Quality Control" were sent to the military for use as lenses on night-vision devices Cool


Nope, these were not rejects, just manufactured this way specifically for night vision devices. Unfortunately, these are out of production now, but they were being made until very recently. I believe these were replaced with a different 85/1.5, then 85/1.2 and later on 100/1.5 lenses based on similar design. I can't confirm exact timeline though.


PostPosted: Tue Nov 24, 2009 11:44 pm    Post subject: Reply with quote
Mal1905 wrote:
Then again, it could be fun to try it and find out - now, where's Dave with his version??? Wink

I've just mounted it on the K10D via an extension ring and tried it out - results are inconclusive. It seems a bit soft and it only focuses at about 1m +/- 0.25m no matter where the focus ring is at. I must have a go at getting this protuberance off in one piece.

aoleg wrote:
Farside wrote:
Nice results from it and that bokeh is quite H-40 ish, doncha think?


It is a Helios-40, just without the aperture and under a different name.

I suspected as much. There are some real echoes of the Helios-40 in the design, even the use of the tripod collar.

Last edited by Farside on Wed Nov 25, 2009 12:13 am; edited 1 time in total


PostPosted: Fri Jan 29, 2010 5:34 am    Post subject: Reply with quote
Guys i just got one here... Click here to see on Ebay
But i am not sure if it is the right one ...
Serial number : 9900609

The lense is 85/1.5


PostPosted: Fri Jan 29, 2010 6:24 am    Post subject: Reply with quote
Looks like the right one, but the only way we can tell for sure is if the seller shows us the back of the lens - with the lens removed from the IR device.


PostPosted: Tue Apr 20, 2010 7:04 am    Post subject: Reply with quote
I have to refloat this post. I have noticed that the older ones have the serial number and 1.5/85 at 90º angle, then the cyclop incription and the manufacturer logo. The newer ones, with prottunding element just the serial number and the 1.5/85 inscription in front of it, Am I right?


PostPosted: Tue Apr 20, 2010 7:20 pm    Post subject: Reply with quote
LucisPictor wrote:
You can make your own aperture diaphragm, just put a disc with a whole in front of the lens.


Obviously you mean "You can make your own aperture Iris", as an Iris is not a diaphragm!
Anyway, putting such a disk in front of the lens would'nt work as all it would do is cause huge vignetting...Any such disk must be fitted somwhere between the front and rear elements inside the lens.
I have a Helios 40 with no Iris (Its long story) and I have tried fitting black cardboard disks with various sized holes in them in place of the missing Iris blades and it works great.
You simply remove the front elements to gain access to the iris ring, push the disk into place and replace the front element.
Removing the front elements of his miltary version would be an identical process as its optically identical to the Helios 40 but as it never had an Iris built in he would need to taylor make the disk to fit inside the lens.


PostPosted: Tue Apr 20, 2010 11:18 pm    Post subject: Reply with quote
Did you made any diamond shaped? I really love to see the bokeh samples.


PostPosted: Thu Apr 22, 2010 6:41 pm    Post subject: Reply with quote
Pancolart wrote:
Did you made any diamond shaped? I really love to see the bokeh samples.


I never thought of making diamond or other shaped holes in the disks...I agree it would be interesting to see the OOF results.


PostPosted: Thu May 27, 2010 6:53 am    Post subject: Reply with quote
I have checked several examples of this lens and have found that there are two different ones.
The newer version (higher serial numbers) has a matt finish and a smoother focussing ring (not so "agricultural").
My copy of the better version has a serial number starting with 931.

Here are a few images:







PostPosted: Sat May 29, 2010 8:56 am    Post subject: Reply with quote
Does anybody know how to remove the tripod mount?
There are three small screws in the ring that points to the camera.
Is it possible to remove this ring, then, and remove the tripod collar?
Handling would be easier without it.


PostPosted: Sat May 29, 2010 9:41 am    Post subject: Reply with quote
Yep, they both come off.

To remove the ring, you need to loosen or remove all three of those tiny screws. The ring is actually threaded onto the lens body with very fine threads, so you unscrew the ring to remove it. It might be a bit stiff, as the three set screws have chewed up the threads. Confused

Once the ring is off, you just loosen the big knob on the tripod collar and it slides right off the back. Cool


PostPosted: Sat May 29, 2010 11:41 am    Post subject: Reply with quote
Thanks!
Got it off!


PostPosted: Mon Jun 07, 2010 12:25 pm    Post subject: Reply with quote
1.5/85mm also exists with protruding back element. The later the version higher the possibility. I'd dare saying it's totally different lens design with much lower quality glass. You can also separate it by that bluish coating (compared to yellow Tomioka type calssic). Just ask the seller of the coloring - he will share that info more easily then to unscrew the lens...

Did anyone successfully used 1.2/85mm?


PostPosted: Mon Jun 07, 2010 1:37 pm    Post subject: Reply with quote
Error!


PostPosted: Mon Jun 07, 2010 2:28 pm    Post subject: Reply with quote
stingOM wrote:
Error!


Where?


PostPosted: Mon Jun 14, 2010 7:36 am    Post subject: Reply with quote
Some images with the Cyclop:

http://forum.digitalfotonetz.de/viewtopic.php?p=977455#977455

I have found it a quite useful lens.
Only I was missing 1/8000 s on my K20 at times. Wink


PostPosted: Sun Jul 04, 2010 11:40 am    Post subject: Reply with quote
For instance this sample is surely the crappy one (sorry Seller): Click here to see on Ebay.de


PostPosted: Sun Jul 04, 2010 12:34 pm    Post subject: Reply with quote
yes, if it looks like it has step-up ring in front than its non usable on cameras


PostPosted: Mon Jul 05, 2010 9:05 am    Post subject: Reply with quote
I say it again - that blue glass is identifier of protuberant variant.


PostPosted: Wed Jul 07, 2010 2:19 pm    Post subject: Reply with quote
blende8 wrote:
I have checked several examples of this lens and have found that there are two different ones.
The newer version (higher serial numbers) has a matt finish and a smoother focussing ring (not so "agricultural").
My copy of the better version has a serial number starting with 931.

Here are a few images:







What you call matt finish looks like a textured paint. Why is that one better? Does it have anything to do with having the name Cyclops as opposed to that other marking?


PostPosted: Wed Jul 07, 2010 2:22 pm    Post subject: Reply with quote
I have purchased this one and am hoping it is usable version...



PostPosted: Wed Jul 07, 2010 2:31 pm    Post subject: Reply with quote
Nothing to worry about there. Enjoy your Helios!


PostPosted: Wed Jul 07, 2010 2:31 pm    Post subject: Reply with quote
woodrim wrote:
I have purchased this one and am hoping it is usable version...



I think it is. What's the extra ring in front of the lens? A screw-in lens cap?


PostPosted: Wed Jul 07, 2010 3:29 pm    Post subject: Reply with quote
Jup, a really solid one that is quite dangerous to the glass if hit by mistake. I rather remove it.


PostPosted: Sun Jul 18, 2010 8:41 pm    Post subject: Reply with quote
Although I haven't received the lens yet, my friend in Europe that collects my purchases and ships to me has sent me a sample picture. This from the Cyclops in the picture I posted previously. Shot with a Canon. I'm amazed to see virtually no CA.

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