Sign in to follow this  
Followers 0
solo

Anamorphic focus assist

19 posts in this topic

EOSHD C-LOG and Film Profiles for All Canon DSLRs

I've been playing with this in my imagination for a while. Great to see it actualized, but right now it probably costs more than an Iscorama!! Would love to see this working well and cheap. Now - must get that engineering degree!!

Share this post


Link to post
Share on other sites

It reminds me of the intro to a Lionsgate movie

 

BTW since he is using a Nex, all that is needed is the 1.8/50 auto focus lens at the rear and job done! 

Share this post


Link to post
Share on other sites
Also glad someone's come up with something like that. nice work. I would think there are major side effects to this treatment though. trouble with matteboxes, changing taking lenses, recharging another set of batteries, and more electronics that could possibly malfunction... And what if your anamorphic adapter has a stiffer focus throw than your taking lens - you may have to get them all regreased before being able to use this, Is it possible to make a purely mechanical one that can be user calibrated? anyway again bravo to the makers of that. step in the right direction

Share this post


Link to post
Share on other sites

Not sure what you mean

 

I am referring to the Takumar behind the Kowa  as presented in the video - a more effective solution is the Sony E - OSS 1.8/50mm without need for LionsGate.

 

 

 

 

Job done?  50mm is a great focal length but that's a myopic solution at best.

Share this post


Link to post
Share on other sites

Regarding a user calibrated single focusing system; in my admittedly poor mechanical mind, I would think each user would have to create three perfectly sized gears which align just right for their set of lenses. Unless you could create gears which can grow and shrink easily (doubt it) so you can modify. I just don't see it happening.

Share this post


Link to post
Share on other sites

Not sure what you mean

 

I am referring to the Takumar behind the Kowa  as presented in the video - a more effective solution is the Sony E - OSS 1.8/50mm without need for LionsGate.

 

Except this is clearly presented as an adaptive solution, not purpose-built for one lens or even one anamorphic adapter.  

 

Of course a simpler solution, for a single focal length or specific lens could be achieved.  It's an irrelevant fact in the context of this man's creation and not a solution approaching equivalency, at best.  At worst it's a shitty attempt to downplay this guy's work.

 

Hopefully you're just being irrelevant.

Share this post


Link to post
Share on other sites

Reported: I have reached a tipping point with the flame bait remarks and foul language consistently directed at me from this member and draw your attention to it

 

 

 

It's an irrelevant fact in the context of this man's creation and not a solution approaching equivalency, at best.  At worst it's a shitty attempt to downplay this guy's work.

 

Hopefully you're just being irrelevant.

Sean Cunningham likes this

Share this post


Link to post
Share on other sites

Regarding a user calibrated single focusing system; in my admittedly poor mechanical mind, I would think each user would have to create three perfectly sized gears which align just right for their set of lenses. Unless you could create gears which can grow and shrink easily (doubt it) so you can modify. I just don't see it happening.

No, it is electronic coupling with a computer, that is what he means when he says you must calibrate it. It will work with any lens he can manage to fit it on. 

 

I have a few ideas for him to make it very easy to change the rear lens quite quickly. If he integrates the anamorphic clamp with the anamorphic support system, ha can then attach the anamorphic parts of his electronics directly to that support instead of to the rails. Once he as done that, the anamorphic and everything related to it attaches to the rails via the support, making it easy to move the whole assembly forward or backward in order to change the "taking" lens.

Share this post


Link to post
Share on other sites

I'd be up for helping him out a bit. If anyone else is, maybe we should get together and let him know. I have an identical Kowa and would love to buy and/or get instructions for how to build one of these. The Kowa is pretty hard to best quality-wise, and dual-focus is quite frankly the only difficult thing about it (obviously this system solves that problem). I only wonder how noisy it is.

Share this post


Link to post
Share on other sites

This is fantastic, though I'm just going to put this alternative out there....

 

Operator pulls focus on the lens, and a focus puller does the adapter. Chinagraph or old fashioned triangles of camera tape for marks on each side, done.

Share this post


Link to post
Share on other sites

I've been thinking for a few weeks now of developing a similar device but purely mechanical.

 

It'll be two alternately sized gears ganged together on a single shaft to accomodate conflicting focus throws and an offset gearbox to reach the taking lens. Most likely rod mounted. Alternate sized gears for taking lenses would have to be available obviously but 3d printing could facilitate that.

 

see attached where green represents anamorphic, blue represents taking and purple represents ganged gears to match throws. yellow 1 is idler and 2 is inversion. they would be on an articulating lockable swing away arm.

Share this post


Link to post
Share on other sites

Zach, the main issue with a purely mechanical design is that the focus scales for various lenses are often variedly  nonlinear.

Share this post


Link to post
Share on other sites

Amazing. I really hope this gets gets refined and made available. How would the Kowa measure

against an iscorama once the dual focus issue is negated?

Share this post


Link to post
Share on other sites

Amazing. I really hope this gets gets refined and made available. How would the Kowa measure

against an iscorama once the dual focus issue is negated?

 

I personally think the Kowa is actually better glass in most cases. Certainly they are equal. Other than the dual-focus issue, Kowa has more advantages, IMO. The Kowas are all metal and built like a tank. They are 2X and sharp as a tack. They are the widest 2X around (AFAIK), and on top of all that, the flares are very classic. 

 

Don't get me wrong, those iscos are nice too, but the flare is often clear (or the color of your light), and they're only 1.5X.

Share this post


Link to post
Share on other sites

I have only used LA7200 and a Kowa B&H, but the Kowa certainly is sharp, the dual focus does slow you down a lot though and increase the rate of error (for me at least). I'd love to switch from the Kowa to isco 36 if it weren't for the $$$ as I'm not really a fan of flares in general and the 2x is a bit too wide for my tastes. Obviously you can crop but then you are losing quality. There is actually a cool article somewhere on eoshd comparing the Kowa to Isco for close focus.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0

  • Similar Content

    • Anamorphic Samsung nx1 goes romantic...
      By christrad
      Samsung nx1
      Anamorphic Lens : Kowa for Bell & Howell
      Talking lenses : Konica-Hexanon 40mm f/1.8 & Helios 44-M 58mm f/2
    • Kowa C35 1.5x Anamorphic lens
      By Ian Edward Weir
      Kowa C35 1.5x Anamorphic lens that is very rare. The lens is in great condition.  $1,100
      The glass has no scratches, just a few very small marks in single coating. Nothing that ever shows up in images. There is no mold, haze or fungus and very little to no internal dust. The body has signs of age but still looks great. The focus is smooth.
      This is a very rare anamorphic lens that produces amazing images. The stretch factor is 1.5x which comes out to a 2.66:1 ratio. 
      The lens comes with a custom front 77mm filter holder. It comes with a B+W 77mm UV filter. The rear connecting mount is a custom Rapido adapter that lets you connect the anamorphic lens to your taking lens. You can quickly change the orientation of the lens. I have another and it's still hard to let this one go. This lens is sharper then the Kowa Bell & Howell and is single coated for very nice purple flares. 
      The back is a 58mm thread but it can be changed using a different step up or step down ring.
      The lens comes with a 77mm front cap and a 58mm metal back cap.
      The lens is a duel focus but I have used it with a Core DNA and it looks great.
      I added a still from a frame of footage I shot with lens.
      http://www.ebay.com/itm/Kowa-C35-1-5x-Anamorphic-lens-Rare-with-UV-filter-and-front-and-back-mounts-/282170312127?&_trksid=p2056016.m2516.l5255
       

    • Anamorphic Samsung nx1 & Konica 40mm
      By christrad
      Ultimate test of the Konica-Hexanon 40mm f/1.8 with Kowa B/H on the Samsung nx1. I'm pretty happy with it and think it's gonna be my main lens with this combo...
       
    • WTB: Iscorama 36 single coated (larger rear element), Iscorama 42 & iscorama 54
      By Gripordie
      Hi there,
       
      looking to buy an Isco 36 single coated (the one with the larger rear element, an Iscorama 42 & an iscorama 54.
       
      if you have any of these for sale or know of anyone who's selling, please let me know:)
       
      thanks!
    • Hypergonar HIFI 2 + Redstan rear & front clamps (FR)
      By Clément Gabriel Jolivet
      Hi, i'm selling a Hypergonar HIFI 2 kit with Redstan front & back clamps. The lens is in very good condition, the clamps are as new.
      It's in Paris but I can ship worldwide in a carefully protected package. If you're in Paris or happen to stop by, we can meet !
      Rear is 72mm, front is 95mm.
      400 euros without shipping costs. I sell it to fund other lenses...
      PM if you're interested...!