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Everything posted by highres

  1. I own the Kowa 16H, which I have recently received and tested with both a Red Epic, a BMCC and a set of Nikon Ai-S lenses. I found that the amount of barrel reflection on heavy flares caused a very strong yellow vignette. I thought it was my particular Kowa, but then I see the same on several Kowa B&H shots. I have now seen this on all sorts of light from sun light to LED to sodium vapor to fluorescent, from medium taking lenses to tele end. I also hear it is common on other anamorphics.   Is this a known issue, is there anything that can be done about it? Does it happen more to some lenses than others or is it inherent to the design of the anamorphic adapter? It does not seem to happen on an Optex lens I've borrowed. I've spoken to two lens technicians who say it is either the design or the lack of blacking on the edges of the front element (?)   I would want to use my Kowa but find the usefulness limited with these vignettes occurring anytime it flares. One thing that comes to mind is to try and add a vignette of my own in post to hide the yellow vignette, but may look to obvious. Will need to do some testing with it.   I will shoot some examples with my lens today as I don't want to offend anyone else by posting their samples.   Would like to get some feedback from people if they have seen this happen and if they have any solutions?   One other forum member mentioned he got this with his anamorphic, and he could reduce (but not eliminate) the vignette with a mattebox.     
  2. ok thanks Gabor will do some testing tomorrow and report back on a new thread. Cheers
  3. Ok. So this problem varies from anamorphic to anamorphic? Or is it just accepted by all as one of the work arounds? Haven't read anyone else report these things before...
  4. Thanks Gabor. I'm deciding whether or not to return this lens. I see that it happens on other anamorphic lenses also. But haven't seen it this extreme before. So how would the mattebox help if the light is pointing straight at the lens? For filming purposes, I would of course want to induce flares without the vignette.
  5. It does not matter, I tried with LED flash lights aimed at the 16H, but even if i point the lens at regular fluorescent bulbs, the vignette appears.
  6. Hi have any of you Kowa owners had the problems of a yellow vignette on strong flares? I see it on some people's footage, but not this music vid. It happens with my Kowa 16H on every focal length, even 80-200mm. On my BMC it does not vignette at 24mm on a Nikon Ai-S without flare. Only with flares. It's a yellow flare, as if the light reflects inside the barrell, same shape.
  7. Hi Tony/Red Stan, I've also been trying to get in touch with you about the front filter clamp for the Kowa 16H and the Optex, but after receiving your anamorphic clamp have not had a reply, neither on ebay or your yahoo. Hope that you still have some front filter clamps for sale. Thanks, Martin
  8. Which iscorama is this one? http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=121099186478&fromMakeTrack=true&ssPageName=VIP:watchlink:top:en   And what about this rare lens? Anyone know any details about it?   http://www.ebay.com/itm/130886833499?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649
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