Jump to content

Gregg MacPherson

Premium Member
  • Posts

    2,643
  • Joined

  • Last visited

Everything posted by Gregg MacPherson

  1. I never thought of fresnels as hard sorces. I supose they are if they are big enough and far enough away. Barring that the "source" is the size of the lems. Compare a fresnel to an open face quartz light with nothing in front, with the same reading on the subject. A single 1K fresnel about 12' from subject has actually a slightly soft look. But I supose it's all relative, hard/soft.
  2. Any advice for seams where one can't get in. I think there are a few spot welded seams.
  3. Hey George, That was actually a quartz conversion I did, not tungsten. The steel for the body must be fairly good, because the paint was failing and crap steel would have quickly rusted to nothing.. But there is only a light spotting of surface rust coming under the paint. The only thing I was unsure about for a repaint or restoration was where spot welded seams have no great protection. I guess one can just seal that in with new paint over the top. Very likeable old lights. When they are unusable they will get turned into reading lamps, then later perhaps, lawn sculpture. Cheers, Gregg.
  4. Looking again at your photo. Where are the possible places to locate the support on the lens. It's hard to read the photo. If the support is forced towards the rear, maybe you could just make a heavy aluminum cheeze plate out of something like 75x12mm section. The camera base and the lens support are screwed to the cheeze plate. Threaded holes go along most of the length so you can mount on a tripod wherever you want. Cheap, quick, easy to do.
  5. You may get some long term useful value from the suport rig if it conforms to one of the standards. Meaning rod size, spacing and position relative to the lens axis. From what Dom says on the lens height, and just looking at the physical size of the lens you are using, You should go for 19mm rod geometry. The 100mm studio rod geom may work, but you would need steel rods rather than aluminium. Bear in mind that the stiffness rather than strength is normally the governing design issue. O'Connor have a nice drawing showing the different rod geometries relative to the lens axis. http://www.ocon.com/labs/rod-standards.html If you can befriend someone with a basic mill/drill you could probably cook something up in 2-4 hours. I have seen some inexpensive 19mm rod bases that were mass produced, probably for the Red camera owners. But you really need a smallish base for the camera, a larger base for the tripod and a small base to sit your lens support on. These three can shift along the some long 19mm rods to give the support and balance that you need. So cheaper to build it yourself. For the surfing shoot rig you may not have many configuration changes, so you could just use set screws rather than clamps to fix the roods. Meaning use your thumb screws as set screws. Not as good as clamps, just a lot easier to make if you are in a hurry. Re the tripod. Get something big. O'Connor 50s are cheap. Cheers, Gregg. PS. Didn't they make you change your name yet?
  6. Surfers like being filmed. You probably don't have to ask them. The long lenses come up because many good breaks are a long way from the shore.
  7. Some cross pollination with the BMC user forum on the S16 lens coverage issue. Someone just posted that they have tested coverage for a full set of 16mm (S16) MKIII Zeiss primes. Confirming (pictures to come) what most of us had assumed from the image circle data. There is a really nice frame grab with a 16mm format Zeiss SS 12nn at the top of this thread, showing the vignette and the loss of illuminance at the corner. http://www.bmcuser.com/showthread.php?4473-Zeiss-Arriflex-16-12-T1-3
  8. I look forward to reading about it. Hopefully you get some good interviews. Cheers, Gregg.
  9. I thought the Cookes came down to 12mm and the Zeiss Ultras came down to 14mm. So the obvious question is did they add 16mm format lenses to that? I bumped into a similar thread on the cinematography mailing list. http://www.cinematography.net/edited-pages/%5Bcml-pro%5D%20Cooke%20lenses%20for%2016mm.htm Scrolling half way down, Ramiro Civita writes... "...Recently while at ARRI (Munich) I've asked if an Ultra Prime lens could be used in Super 16. The answer was a typically bavarian one: it was not designed bearing Super 16 in mind (if one could fit the UP to the SR anyhow). If I'm not wrong the circle of confusion of a 35mm cine lens averages 0.025mm and that of a 16mm lens 0.017mm (sorry can't remember the figures in inches). Simply stated the smaller the format the smaller the circle of confusion needed for that lens to render acceptable images for a given projected (or printed sice) in relation to its viewing distance....." Several people writing there who are using 35mm format (cine) primes for !6mm or S16 and very happy. I assume peoiple use S16 lenses for the wides, but haven't heard much explicitly yet.
  10. Did "The Rum Diary" and "Vera Drake" ony use 35mm format primes? No 16mm format primes?
  11. Sorry Lonny, I don't know the NPR. I was just trying to encourage you to have adequate power supply to the camera, to remove that uncertainty. There are several NPR guys who may notice your thread and give some ideas. Cheers, Gregg
  12. Get yourself a multimeter so you can check the battery voltage whenever you want. Fully charge the battery using an appropriate charger for the correct length of time.
  13. Mediocratizing it? I wish I could say I invented that word.
  14. How do such cameras work? Are they still intermittent movements or do they use revolving prisms or such
  15. Trying an attachment again. If anyone recognizes this adapter and knows who made it can they let us know. Thanks.
  16. Trying that attachment again. Having trouble. David, if you send me an email address I can send a set of photos direct to you. My email is viz(at)xtra.co.nz
  17. I'll try to attach pictures of that PL adapter now. The grinder marks on the front don't affect the function, but they are not pretty, so maybe the price could come down. If anyone recognizes it and knows who made it can they please let us know.
  18. Most people are. Perhaps that's why it's all happened this way.
  19. If we knew how to read every grain of sand on the beach....each one would tell the story of the seemingly endless waves that had rhythmically moved it,. The light from the sun that had landed upon it. The interactions it had had with it's neighbours. The gravitational attraction to the earth, the moon and the other proximate bodies in the solar system. And more.... In comparison, a pixel, as far as I can tell, counts photons that land in a rectangle. Relatively large numbers of photons, relatively small rectangle, yielding an averaged value. This is a one dimensional piece of information. Hats off I guess to the programmers who are able to simulate a photograph from these. The word interpolation often comes up, but the word simulation always seems more apt. I'm not sure why as a society we are abandoning the fact of the photograph, I mean the sense of reality inherent in a photograph, the literal imprint that one thing has imposed upon another (and hence the cinema), in favour of these digital simulations. Chris, I'm not sure where your pithy jokes place you, what your opinions really are. Ask yourself, do you love the beach or not? Cheers, Gregg. PS. I finally got banned from the Kiwi 48hrs forum. Those mutterbumfers !
  20. Leaving aside for now my reaction against morbidity on television...... The Killing is such an interesting watch. The sound is in perfect sympathy with the visual style. There's a sort of throaty compressed quality, almost no music, lots of abstract aural tones to directly convey emotions. The sound feels sort of grungy, but normally is easy to "read" against a sparse background. There is something very seductive about Holder's street slang mumblings, often barely understandable, very expressive. This is partly the content, the writing, the character, the photography helping to create how that feels. But it's also, obviously the sound rec and mix. Does anyone know anything about how they are recording or mixing sound for this show?
  21. That's really funny. I hope Michael, from Chicago, who sounds like he's working on the beach near LA, gets it.
  22. Hey David, I haven't found out any more on who made that PL adapter. I might put a picture up here tomorrow. It's all stainless, very well made looking. Cosmetically, there are a some grinder marks on the front ext of the locking ring. I don't know the story behind that, but it has no effect on function. Don't think I could come down much in price from USD300. I had a cheaper one two years ago that was made all of aluminum. I bought it and later sold it for USD250.
  23. George, what movies were you thinking of there as niche artsy BS?
  24. I've just had an email from Bruce at Arranda. Looks like I'm probably wrong that they made that adapter. Have to figure out who did.
  25. Hey David, ACLs are great cameras. The adapter idea, really a (knurled ring) screw on remount, allows almost anything. There are probably a few people able to make the adapters. Les Bosher (UK) and Arranda (Australia) come to mind. Both are really well made. I think the normal Les Bosher one you can crack the locking "ears", if you are rough. I have seen them for sale like that. Probably a part that would be cheap for him to replace. The Arranda one, I'm assuming is still available on demand. Actually I have one that I am selling soon. I have both the Les Bosher one and the Arranda one. The Les B is new so I am selling the Arranda one. It's a very robust design, and I think it is designed so that you can screw off the PL front and replace it with other mounts. Just a guess. You could ask Bruce at Arranda directly. Bruce McNaughton <bruce@arandafilm.com.au> . This may nean it is a cheaper way to achieve some of the other mounts you need. All depends on what price ideas that they have etc. Prices. Les B has a list price of 380 English pounds (USD 597) but I think often gives discounts. My used but fit looking Arranda one, probably USD300. Let me know, I was going to soon notify the forum of the several ACL components I am about to sell on eBay. - AZSpectrum B&W video assist - Kinoptik VF - Anatomical handgrip with cable - 15mm rods and base setup for ACL II - PL mount (TS/PL adapter for all ACLs), Arranda made. - Top handle (factory made) for ACL. Cheers, Gregg
×
×
  • Create New...