gethin Posted August 30, 2020 Share Posted August 30, 2020 how hard can it be? i know theres a company that makes them, but not for my z-6. i guess id' need to cut a rectangle out of a filter. is this a terrible idea? 😄 Quote Link to comment Share on other sites More sharing options...
Video Hummus Posted August 30, 2020 Share Posted August 30, 2020 I find in practice it is less convenient then a screw on fixed ND. It really only make sense for lenses that you can’t screw a ND on the front of the lens.  gethin and Geoff CB 2 Quote Link to comment Share on other sites More sharing options...
BenEricson Posted August 30, 2020 Share Posted August 30, 2020 10 hours ago, gethin said: how hard can it be? i know theres a company that makes them, but not for my z-6. i guess id' need to cut a rectangle out of a filter. is this a terrible idea? 😄 Exactly. It shouldn’t be. My Bolex from the 60s has an internal ND slot built in... Takes two seconds to drop in a filter. The cost and development required wouldn’t give companies a high enough ROI... So nobody does it. I think I remember someone developing a internal ND for the original black magic pocket. If I remember correctly, it took a few minutes to install. gethin 1 Quote Link to comment Share on other sites More sharing options...
elgabogomez Posted August 31, 2020 Share Posted August 31, 2020 The problem is you change the flange focal distance so markings on the lens are going to be off, may not seem like much of a problem, but your lenses won’t focus to infinity or go past it and with anamorphic it’s a bigger problem cause both spherical and cylindrical glass has to be precisely focused at the same distance. That’s why on focal reducers for example, the adapters are shorter than on regular adapters. Quote Link to comment Share on other sites More sharing options...
Kisaha Posted August 31, 2020 Share Posted August 31, 2020 Do you know about the electrochromic rear view mirrors? "With the electrochromic material added to an auto-dimming mirror, electric voltage changes the way in which it absorbs and reflects light. An auto-dimming mirror usually has a set of cameras or sensors (photodiode-based photodetectors) that are light-sensitive semiconductors, which turn light into current." There are more basic functions like glasses, e.t.c It seems that when applying a tiny electric voltage you can control such mirror at will. If anyone has the ability to put a very good neutral material in front, and control the darkening with steps (or f stops) then we would have amazing eNDs. Quote Link to comment Share on other sites More sharing options...
Anaconda_ Posted August 31, 2020 Share Posted August 31, 2020 1 hour ago, Kisaha said: It seems that when applying a tiny electric voltage you can control such mirror at will. I think Doc Brown has already made an eND like this. Oh wait, no, it was @BTM_Pix 5 hours ago, elgabogomez said: The problem is you change the flange focal distance so markings on the lens are going to be off If I recall correctly, many Canon L lenses have rear filter slots. I'm not sure if there's NDs built for them, but I would assume so. And there may be a few other lenses with a similar design. Quote Link to comment Share on other sites More sharing options...
Timotheus Posted August 31, 2020 Share Posted August 31, 2020 @gethin I use the Fotodiox Vizelex ND Pro adapter, EF to Nik Z. Super practical. https://fotodioxpro.com/collections/vizelex-nd-throttle-adapters/products/eos-nikz-pro-ndthrtl Quote Link to comment Share on other sites More sharing options...
gethin Posted September 1, 2020 Author Share Posted September 1, 2020 21 hours ago, Timotheus said: @gethin I use the Fotodiox Vizelex ND Pro adapter, EF to Nik Z. Super practical. https://fotodioxpro.com/collections/vizelex-nd-throttle-adapters/products/eos-nikz-pro-ndthrtl yep no good for me, I've got nikon glass on nikon bodies, and i want to keep my lens control  ANyhoo, I ordered a cheapish ND, some bizzarely cheap Nds to practice on and a glass cutter. I have seem someone saying that gel NDs dont give focus issues, which might be OK, but havent been able to find any. (Or at least not for sensible amounts of money).  I wonder if the location of the ND makes a difference to the focus issues? Is it better to be close to the sensor, or close to the lens?  Quote Link to comment Share on other sites More sharing options...
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