Sign in to follow this  
Followers 0
solo

Anamorphic focus assist

19 posts in this topic

EOSHD Pro Color for Sony cameras

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

    • WTB: Helios 44m & Tokina +0.4 Diopter
      By brianmcall
      Hey everyone, I'm looking to buy a Helios 44m-7 lens.  I don't trust ebay with this lens as it looks like most are switched plate fakes, unless you know of a reputable seller with one.  Also looking to pick up a Tokina +0.4 Diopter, if anyone would like to part with theirs.  Thanks!
    • Bausch and Lomb Anamorphic Lens
      By hexemie
      I'm selling my Bausch and Lomb anamorphic lens and lens/telescope collars for rails. This item can be altered by following the procedure entitled "Anamorphic Cooking" to give greater results using this lens. More info on that can be found in this part of the EOSHD forum: 

      In the auction I'm including the lens and collars for $135. Please let me know if you have any interest and thanks for looking.
       
       
       






    • Panasonic AG-LA 7200 $629 + shipping
      By hexemie
      The Panasonic LA7200 is an anamorphic adapter that creates a 1.33x stretch, so any camera shooting 16:9 will output a Cinemascope ratio for  footage for post. I've used this lens with my Panasonic GH4 with great results.
      This listing will include a 77-49mm step down ring and a 49-52mm step up ring that I used with my Canon FD 28mm (2.8) and 50mm (1.4) lenses as well as my Mir 37mm and Helios 58mm lenses. It also includes the front and rear lens caps.
      This adapter uses the taking lens to focus and doesn't need an adapter. It's been a great lens for me to learn with and is great for making the foray into anamorphic shooting.
      Please ask if you have any questions and I am open to offers. I am selling this item as/is with no returns. 
       
      Images can be found at http://imgur.com/a/NQ4if
    • [WTB] Kowa Bell & Howell Anamorphic Lens
      By maxvonlux
      I'm looking for a Kowa b&h 2x Anamorphic Lens. 
    • Anamophic diopters, Foton, Lomo
      By Sean Keen
      Selling some lomo and foton diopters, photos  on request