Jump to content
Sign in to follow this  
Tito Ferradans

Isco 16:9 Video Attachment I - Questions and Answers.

Recommended Posts

Long time no see, guys!

 

I've moved to Vancouver six months ago to attend a VFX intensive course (which isn't over, by the way), and got the lens in a stroke of luck for a decent price, about the same time I moved here.

 

Problem was I had sold my Isco 54 a while back and had no clamp or step rings to make it work. Believe me or not, took me six months to dig some time and go out hunting a decent priced step ring (a guy tried to sell me a 49-67mm for 36 bucks!). The relevant part is I'm able to run tests with it on the following weeks, I believe.

 

I also got a regular Isco 54, and a 36 VD for comparisons. At a first glance, the 16:9 Attachment felt sharper than the 54 and, when shooting 16:9, you go straight to 2.4:1 cinemascope which is a more familiar aspect ratio for a lot of people.

 

More on the lens body, it weights about the same as the 54, but has nice rubber rings for better grip and focus feels more natural than the 54 too (for me, the 54 focus ring is too light, almost sliding out of control). The size is exactly the same as the 54, rear thread is 72mm and front is 95mm. Minimum focus is a tad closer than the default 2m, even though the closest focus mark on the ring says 2m.

 

I'm using a 5D3 for testing, and the lens is free of any vignetting when paired with an Helios 44 (58mm), which unfortunately doesn't happen for the Mir 1B (37mm), that shows a lot of vignette (I wouldn't even call it vignetting, actually, because it takes almost half the frame).

 

It's not a common lens and there isn't much (almost none) information about it on the web, so lets fill this gap. Are there any specific tests or questions you guys want me to try and answer?

post-22801-0-82667800-1417904994_thumb.j

Share this post


Link to post
Share on other sites
EOSHD Pro Color for Sony cameras EOSHD Pro LOG for Sony CamerasEOSHD C-LOG and Film Profiles for All Canon DSLRs

Thanks guys, it's good to be back! hahaha :)

 

Found this video, by Kostas

 

He sold this lens about 18 months for something near EUR 6k, which, IMO, is a total ripoff, like those $6k Iscoramas.

 

This lens is originally a projector lens. It's a 16:9 video attachment for watching widescreen movies on 4:3 systems, almost like you said, dahlfors. It is a 1.3x adapter.

 

The good version (the one I have here) is the Mark I. Later ISCO released a Mk II and III, which are waaay bigger and heavier (bulkier, I'd say), so they're no good for most of us, even though every once in a while they pop on ebay for huge amounts of money. (here's a look at Mk III, or >Mk II here on EOSHD)

Share this post


Link to post
Share on other sites

IMO, all the anamorphic lenses have correct ratio at relative infinity, such as more than 5~10m, depends of FL.  I used 1.33x, 1.5x and tons of 2x lenses.  If the anamorphic lens mounted is not close the taking lens, it will show less ratio.  The best mount size is not equal size of the taking lens filter thread and rear mount of the anamorphic lens.  In equal size, you never get closest of two lenses.  The best is the anamorphic lens rear mount is 1 or 2 step down size in my experience.   Step up mount will not get closer too.  My mounting way always makes the air gap between two lenses' glasses within 1mm or less, almost touch each other.

Share this post


Link to post
Share on other sites

IMO, all the anamorphic lenses have correct ratio at relative infinity, such as more than 5~10m, depends of FL.  I used 1.33x, 1.5x and tons of 2x lenses.  If the anamorphic lens mounted is not close the taking lens, it will show less ratio.  The best mount size is not equal size of the taking lens filter thread and rear mount of the anamorphic lens.  In equal size, you never get closest of two lenses.  The best is the anamorphic lens rear mount is 1 or 2 step down size in my experience.   Step up mount will not get closer too.  My mounting way always makes the air gap between two lenses' glasses within 1mm or less, almost touch each other.

Have you ever accidentally scratched the front element of your lens by butting the rear anamorphic element up to it?  Or do you have a way of being certain the two won't touch?  Fine tuning the distance always makes me nervous.  

Share this post


Link to post
Share on other sites

Have you ever accidentally scratched the front element of your lens by butting the rear anamorphic element up to it?  Or do you have a way of being certain the two won't touch?  Fine tuning the distance always makes me nervous.

Usually, I use adhesive tape to cover the anamorphic lens rear edge first.  So it is possible to let it touch the front glass of the taking lens without scratching the front glass.  The glasses between two lenses would not touch, we can estimate that. 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

  • Similar Content

    • By icarrere
      GH5 and Iscorama pre36. The way I saw Japan in  a 9 days travel.
      Thanks to webrunner 5 for his help.
       
      or
      https://vimeo.com/271896481
    • By brianmcall
      Please let me know if you have an Iscorama to sell. Thanks!
    • Guest
      By Guest
      Nearly mint condition Iscorama 2004 anamorphic lens
      You have in front of you probably one of the most qualitative anamorphic lens ever made by Iscorama. The is a very rare lens, the last one ever sold on the web dates back to 2013.
      This Iscorama 2004 is a monobloc lens composed of a Leica 50mm f/2 Summicron-R donor lens, and an Iscorama 42 MC anamorphic element (I would guess because of the shape, but the box says 36).
      The lenses and the mount are precisely aligned, so no need for alignment anymore.
      It results a sharp image, a little bit of deformation, and the famous anamorphic bokeh.
      And... to finish well. The lens covers full frame sensors.



      Technical specifications :
      Brand : Isco Germany Model : Iscorama 2004 Lens Mount : Leica R Squeeze factor : 1.5x (1.42x to be precise) Focal : 50mm Horizontal field of view : 35mm Apertures : 2, 2.8, 4, 5.6, 8, 11, 16 Aperture blades : 6 Front filter thread : 82mm Dimensions : 100x82x82mm Weight : 800g Package content : lens, front cap, rear cap, original box You can preview pictures of the lens here :
      https://1drv.ms/f/s!ApPNj1C2_E6GnOFW8PWEfXrO8EDFUw
      And pictures taken with the lens here :
      https://1drv.ms/f/s!ApPNj1C2_E6GnOFwwD9gpbeoGof6-Q
      The item is sold as is.
      Price : make an offer. The lens will be sold to the best bid.
    • By redimp
      Title says it all. Payment via PayPal, shipping on me.
    • By desoxymo
      I'm selling my Iscorama Pre 36 Adapter. It is rehoused by Van Diemen.

      You can find it here:

      https://www.ebay.de/itm/232638101663?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649
×
×
  • Create New...