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Bold

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Everything posted by Bold

  1. What's your budget? What's your camera/Lens/Rig setup? What are you shooting, narrative, documentary, etc? Provide more info and you will get suggestions that better match your needs. Cheers, |. . | .|
  2. A little more B&L info: The locking ring (silver or red) must be tightened/loosened with the distance ring. I've found two kinds of B&Ls, one has a black body and silver locking ring, the other has a silver body and red locking ring: The black ones were the later models.
  3. Yes, Logan Stewart (Vimeo user Variables of Light) really seems to get the most out of his Bausch & Lomb. And his is a modified B&L using the cooking anamorphic tutorial. I'm wondering if the quality of his footage is a result of how he did the lens mod, how he handled the modded lens (to get better results than this), or both. I found this tidbit on a home theater forum: So this technique apparently takes the projection distances from 50 feet to about 20 feet. I wonder if adjusting the B&L in this manner would reduce the minimum filming distance to closer than 12 feet. I also found this in an ebay listing: Which would explain why Ken and enny were unable to adjust focus on the B&L itself.
  4. Again great info - thanks! Definitely post those videos if you find them!
  5. enny, I appreciate the info and the picture of your setup! I watched a clip of Roberto Lopez' chopped B&L which used a 24mm Nikon. In a later clip there's a shot at 0:45 where the curvature in the pillars is very pronounced. I don't know if that's a characteristic of the B&L, a result of being too close to the pillars, a byproduct of the lens hack, or some combination. But it's definitely something I want to avoid (or at least minimize). Are there any other tips, details, or footage you could share? Can you explain how you do single-focus with your setup? Do you focus with the B&L, or the taking lens? Thanks again! |. . | .|
  6. I wonder if there was variation in the manufacture, where some lenses did not allow focus, while others did. I've read at least one instance where a B&L owner could do nothing with the focus ring, and it turned out that because of the age of these things, the rings can become solidly stuck in place due to sediment, grime, etc. And as a result, it required an automotive tool and an inordinate amount of torque to un-stick! Thanks - though as I said in my first post, I already bought a B&L - so I'm really looking for hard data on those, rather than what better options are available. Mostly I bought it as something I can tinker with...maybe I can learn from, and if I break it, it hasn't broken my wallet! If I can collect info from B&L owners and add some of my own in the process, maybe it will be of practical use to other folks here - particularly novices like myself! Cheers, |. . | .|
  7. Do you know if that is a result of poor manufacturing or the age & wear on the glass? How does the unevenness affect the image? I would be interested in seeing examples if you have them!
  8. As much as hard data like weight, dimensions, modifications etc would add value to this thread, specific caveats like optical imperfections are also useful. Could you link to some clips that illustrate the uneven glass? Do you mean anamorphic "mumps"?
  9. I have read that the B&L Cinemascopes are large, heavy, cumbersome, low on flare, and require gymnastics to override the minimum focus distance. So I don't have grand expectations for it, but for 75 bucks I can afford to experiment. I'm sorry the Rectimascop didn't work out, that's a bummer. But I'm really looking for usable details, data, and experiences from Bausch & Lomb owners.
  10. I thought this and this were interesting. I know nothing about making optics (or optics in general, for that matter) but maybe of interest to intrepid optical engineers & DIY-ers out there? Also, a hat-tip to Ian for pointing out the Angenieux diopters, I picked up a set for my 12-120mm. Cheers!
  11. While I'm waiting for my new helicoid to arrive for my Bell & Howell Projection Lens, I picked up a Bausch & Lomb Cinemascope Projection Attachment I. I don't have much interest in dual-focus, but the lens was cheap & in good condition, so I thought I'd give it a whirl. I haven't found a whole lot of info on the lens yet, though this mod looks interesting. Like my B&H thread, I'm hoping B&L owners will weigh in with any details, data, or experience using this lens. I won't sink my teeth into this project until I've finished with my B&H, but I figure I'd get the ball rolling. And maybe down the road, helpful info can be added to the Anamorphic Lens-yclopedia. I'll bust out the caliper when my lens arrives to get some measurements, but the rear thread is reported to be 70.6mm. And I found a few details about disassembling the lens here, here, here, and here. From what I've read, the lens is not big on flare due to the coating though I've seen a few clips on Vimeo that show some decent flares. So anybody have B&L information to contribute to build up the knowledge base around this lens?
  12. Why not order one here, directly from the source?
  13. My Antares finderscope clamp arrived today and it fits great: Here I reversed the bracket, which puts the base at the end that joins the taking lens. However, this makes the unit nose-heavy: I think it's best to have it clamped the other way around as in the previous pictures - adding stability to the end that gets the most vibration/movement (from focusing). The top screws can be used to help visually align the anamorphic, too. As mentioned, I'll have have to do do some modding to flatten the rail base, but I am very encouraged by the results! All in all, $37 well-spent, I think! Cheers, |. . | .|
  14. Thank you for the kind words! Another possible solution is to take a cast of the original front housing, and a cast of a female thread (on my case (58mm), then combine them into one mold. Then cast those in something like brass or rigid polyurethane. Then cut & combine them so one end is a perfect fit for the anamorphic and the other end is a perfect fit for the helicoid. Brass would be ideal but polyurethane is more within my budget. For under $100 I should be able to attempt several casts. Thanks for posting the pics of your B&H's. I'm optimistic the dual clamp rings of the Antares finderscope bracket provide the stability you need. I should be able to verify in a few days. I'll also let you know what I find out from the 3D printer. Cheers, |. . | .|
  15. Wish I had the caliper before I bought the m58 Oh well. That's what I get for being too eager and not being patient & methodical enough. I may get an m52 helicoid, although I don't know if the thread mount would fit around the 53.88mm end of the anamorphic. Rich, can you verify? I may go ahead and try to work with the m58, still debating I'll really want to find a permanent solution for attaching the helicoid to the anamorphic. Although the anamorphic's 53.88mm thread seems proprietary so I don't know if there's anything I can kitbash in terms of adapter rings or pipe threads. I don't know if 53.88mm equates to some kind of 54mm thread, or a 2 1/8in thread, or something else. I'm going to swing by the 3D printing place tomorrow and chat with them to see if they have any thoughts on a solution, and to see what it would cost to print a semi-rubber lens holder to fit the m58. Absolutely! Again a great big thanks to Rich, QuickHitRecord, Tito, nahua, et al, for all the great info. I wouldn't have made it this far, I hope the info I'm adding is proving useful for folks. My goal is to have a finished version in September and post back with an organized, step-by-step review of the process.
  16. For anyone with a B&H who needs measurements, I threw a digital caliper on mine:
  17. Cool, do you have a picture of your Bell & Howell setup you could share?
  18. ...I meant zooming, not focusing. B&H does the focusing
  19. Thanks Gabriel, I have a Redstan for my Century Optics and it's a fantastic piece of gear. For the B&H, I want something that will both support it's weight and provide the flexibility to slide forward and back a little, as a couple of my lenses change body length when focusing. I thought of fabricating something using parts from a hardware store but in a moment of inspiration I realized the product already existed. Volia: The Antares 50mm finderscope clamp: Weight: ~170gTwo ring clamps for added support & stabilityRing Diameter (inner): 62mm. The diameter of B&H varies along the barrel, ~50 to ~55mm along the area the clamps would go, so it should fit without problemsThe screws are plastic/nylon, so they won't scratch the barrelSlotted rail base, so the the lens can slide forward & back while the clamp holds the anamorphic in alignment, the base also has a screw for locking it in placeThe base is curved to fit on a telescope, but that can be belt-sanded flat, and attached to a 15mm rod bracket. I have one of these, I'm thinking I will also belt-sand the top of that flat, then screw the two pieces together, so that the rings sit on a bracket that has adjustable heightPrice: $37 with shippingFinderscope brackets are also available 80mm, 90mm, and possibly other diameters - opening up possibilities to folks here with other sized anamorphics. My bracket should arrive next week. I'll have to hit up a friend of mine for the machining/sanding, but that should be quick work. I'm moving in a week, so I probably won't get to this work until September. But I will most definitely be posting back here with photos & conclusions. As for my o-ring issue, I'm contemplating getting something 3D printed to fit the front element into the helicoid. There's a place in town that can do rubber-like material. It's just a matter of what the cost is. Cheers, |. . | .|
  20. I haven't found any clear info on that yet. For full frame it's ~85mm. Not sure what that translates to for Micro 4/3. One B&H owner told me he's using a Nikkor 50mm f1.8 with negligible vignetting on his GH4, but the key word is 'negligible.' I guestimated a 55-58mm prime with angle of view of ~40 degrees would do, but my test indicates otherwise. Any insights or firsthand experience from forum members would be greatly appreciated!
  21. Hi Brandyn, there's some info about the Sun in this thread here.
  22. One of the o-rings arrived today. I spent a couple hours cutting & sanding it down to fit in the helicoid. The real trick was getting the the glass to align (relatively) parallel with the anamorphic lens. I'll probably seek a more accurate solution but it was enough to do some tests. Here is the helicod and the anamorphic, the anamorphic has some white pipe thread tape around it to help secure the helicoid reverse threads. Helicoid attached, focus fully extended. Helicoid fully retracted. Helicoid with improvised (but extremely snug) rubber o-ring. And a 58mm lens cap for good measure. So I threw on my Helios 44 (not Helios 44-2) 58mm and did some quick & dirty video. Here are a couple screenshots: Initial thoughts: Aspect ratio of 3.55:1 shows minor vignetting. Crazy flare.I don't think I was quite able to hit infinity, but I think I can resolve that by adjusting distance between the elements by reseating the glass in the o-ring.I need to secure the helicoid to the anamorphic assembly, there was a small amount of play there when shifting focus.There was a lot of alignment shift going on. The B&H will need to be locked down to a rig tightly to ensure the anamorphic remains aligned vertically.I still have a lot of work ahead to take this from work-in-progress to finished product, but so far the results are encouraging.Other miscellany: A rig may not be small enough to be considered run-and-gun, but would still respectably light & portable.Plenty of Series 7 adapters available to marry most lenses to the B&H, I even picked up a 72mm to Series 7 for my Angenieux 12-120mm Still need to test the 12-120mm on the B&H. Not the ideal, as it will vignette, but it will do for the purposes of testing parfocal zooming.Once I come up with a more permanent configuration for everything, I'm going to affix a focus gear around the helicoid for follow focus.I'm going to wait until the permanent configuration is done before I start slapping wide angle attachments on it.Other reasons I chose the Raynox 0.66x over the Sony 0.7x wide angle is that it is not only smaller in size, but it also has a 72mm front filter thread.That's all I got for now. More soon... Cheers, |. . | .|
  23. I've ordered two different rubber rings in hopes that one of them will fit snugly around the lens and hold it firmly in the helicoid. I also ordered some PVC pipe tape, some pipe thread sealant tape, and some shrink tubing...between those three I should be able to secure the helicoid to the anamorphic body. Once the orders arrive I'll put it all together and - if successful - post the results back here. I'm taking a few pictures as I go, hopefully they'll help other folks who want to try this mod. Also, based on the conversation here, my curiosity was piqued about adding wide angle adapters to the front of the anamorphc, to offset the longer lens requirements of the B&H in order to avoid vignetting. I've picked up the following adapters: Canon WC-DC58 | 0.8x Raynox HD6600pro-58 | 0.66x Century DS-55WA-58 | 0.55x Vivitar VIV-67W | 0.43x It looks like QuickHitRecord and nahua used the Sony VCL-HG0758 0.7x. But after reading this I opted for the Raynox 0.66x because of the lower weight & less edge distortion. Knowing the distortion was only going to get worse the wider I went, I opted for the Vivitar in the 67mm thread (instead of the 58mm) for the 0.43x. My thinking is that the anamorphic looking through bigger glass will miss the more severe distortion at the outer edges. We'll see. Once I get the anamorphic together & working (fingers crossed) I'll do some test footage with various taking lenses as well as the wide angle adapters, and post results back here. Vintage lenses I hope to test: Sears 55mm f1.4 Helios 44 58mm f2 Helios 44-2 58mm f2 Jupiter-9 85mm f2 Nikkor-P 105mm f2.5 Angenieux 12-120mm f2.2 (to test parfocal zoom) ...Possibly a few others Cheers, |. . | .|
  24. Rich, sorry to keep pestering you...did you use anything else from the front assembly? The part I outlined above sort of looks like the part from your photo below that I've highlighted. Or is that the rubber o-ring you used: I'm trying to determine what I need for securing the element to the helicoid because there is a lot of open space. Also, by your pictures it looks like you used something like electrician's tape for securing the helicoid to the anamorphic section. Is that correct?
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