Michael Koshkin Posted February 26, 2021 Share Posted February 26, 2021 Hi All, I have a Beaulieu 4008 with the Max 8 mod by Pro8 and the Angenieux 8-64. I’d like something wider. Thinking I should probably get the Schneider 6-66 at some point, but I’ve also been looking at C mount super wides like the Century 3.5mm. I know this topic has been discussed plenty on here. I’m wondering what people think about adapting the Laowa 4mm fisheye to C mount? It was designed for small format mirrorless cameras so the lens mount options are not the most ideal (M4/3, EF-M, Fuji X, Sony E and L mount). With a quick search, the only C mount adapter I could find for any of those is a Fotodiox Fuji X to C. Any thoughts on this? Think the flange will be off? Also, since this covers M4/3 sensors, I’d assume that on Super 8mm with a Max8 gate, I’m gonna get the expected fisheye vignette in the corners, but would the lens cover the width of the gate? I would expect it would. If a 4mm is gonna be something like a 16mm fov equivalent in Super 35 terms, I like the sound of the focal length. Also, it’s a quite a bit cheaper solution than buying the Century 3.5... Ive also looked at some c mount security camera lenses. Anyone used any they liked? Link to comment Share on other sites More sharing options...
Philip Forrest Posted February 26, 2021 Share Posted February 26, 2021 (edited) Since there is only .174mm difference between the flange focal distance of the large Fuji X mount and the small diameter of C mount, you will not be able to achieve infinity focus unless the adapter has a negative glass element built in to it. Phil Forrest Edited February 26, 2021 by Philip Forrest measurement correction Link to comment Share on other sites More sharing options...
Michael Koshkin Posted February 26, 2021 Author Share Posted February 26, 2021 Thanks for the note, Philip. Do you know the minimum distance needed to achieve infinity? Maybe one of the other mount options of the lens gives enough distance if I could find an adapter... Link to comment Share on other sites More sharing options...
Philip Forrest Posted February 26, 2021 Share Posted February 26, 2021 https://en.wikipedia.org/wiki/Flange_focal_distance Phil Forrest Link to comment Share on other sites More sharing options...
Michael Koshkin Posted February 26, 2021 Author Share Posted February 26, 2021 24 minutes ago, Philip Forrest said: https://en.wikipedia.org/wiki/Flange_focal_distance Phil Forrest Yeah, I was looking at the flange distance of different mounts on there before. Seems like M4/3 and L are the only mount versions of this lens that are more than 1mm greater. Maybe it’s a lost cause. I haven’t seen a mount for either of those to C. Link to comment Share on other sites More sharing options...
Philip Forrest Posted February 26, 2021 Share Posted February 26, 2021 If you're not averse to tinkering, go to the hardware store and buy a couple different fisheye door peep viewers. You'll need a simple convex/convex element behind the main lens to project the image properly on a film plane but between finding junker fixed focus Wollensaks and a few different size/focal length peep-holes, you'll still be under $50. They aren't as fast as a "real" lens for photography, but fun to play with. I have one of these stuffed into the filter holder of a fixed focus Wollensak 20mm and it resolves an image a little bigger than standard 16mm 4:3. This reminds me, I should get that lens out and play with it more. Phil Forrest Link to comment Share on other sites More sharing options...
Volker Bendt Posted March 1, 2021 Share Posted March 1, 2021 Optivaron 1,8/6-66 with Schneider Aspheric ultrawide lens III wil give you around 4mm. I use this combo with both my Leicina Special and Bolex DS-8, it's sharp, shows nearly no distortion, but tends to flare under critical lighting condition. Good luck, Volker Link to comment Share on other sites More sharing options...
Michael Koshkin Posted March 2, 2021 Author Share Posted March 2, 2021 18 hours ago, Volker Bendt said: Optivaron 1,8/6-66 with Schneider Aspheric ultrawide lens III wil give you around 4mm. I use this combo with both my Leicina Special and Bolex DS-8, it's sharp, shows nearly no distortion, but tends to flare under critical lighting condition. Good luck, Volker I wonder how bad this will vignette on a max 8 gate? Pro8 sells their modified cameras with the Angeneiux 8-64 and notes the Schneider 6-66 and 6-70 vignette. Wondering if that’s just a little in the corners or to the point of seeing a black circle around the frame... Is this from the focal length or the physical lens circle/coverage size? And would the wide adapter make it worse? I don’t mind a little darkness in the corners for some stuff, but wouldn’t want to go with this combination if I’m gonna physically see a black circle. Maybe I should be looking at wide 16mm lenses that will cover the larger frame? Link to comment Share on other sites More sharing options...
Volker Bendt Posted March 2, 2021 Share Posted March 2, 2021 Hi Michael, how wide is the Max 8 gate? Volker Link to comment Share on other sites More sharing options...
Michael Koshkin Posted March 2, 2021 Author Share Posted March 2, 2021 7 minutes ago, Volker Bendt said: Hi Michael, how wide is the Max 8 gate? Volker 6.33mm of the frame is used as opposed to 5.69mm in reg super 8mm (according to the Pro 8 website). Link to comment Share on other sites More sharing options...
Volker Bendt Posted March 3, 2021 Share Posted March 3, 2021 Out of curiosity I made some test shots with my Leicina Optivaron and Leica M. The image circle is around 7,5mm, with and without ultrawide lens. It seems to be worth a trial. Volker Link to comment Share on other sites More sharing options...
Michael Koshkin Posted March 9, 2021 Author Share Posted March 9, 2021 On 3/3/2021 at 5:43 AM, Volker Bendt said: Out of curiosity I made some test shots with my Leicina Optivaron and Leica M. The image circle is around 7,5mm, with and without ultrawide lens. It seems to be worth a trial. Volker Thanks for the research! I just shot a test roll of some very expired PlusX (Schneider 6-70mm and Schneider Ultrawide III adapter on a Beaulieu 4008 with max8 gate). Once cropped to 16:9 it does vignette but I can work with it. Blowing up the frame to about 103-104% gets rid of the vignette and at that point, it's still much wider than anything else I've found. https://imgur.com/a/PzvplA1 Link to comment Share on other sites More sharing options...
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