Ahmed Al Dhahyan Posted May 31, 2020 Posted May 31, 2020 (edited) Hi guys. Does anyone have any idea about HMI (ARNOLD&RICHTIER). what about density-brightness and temperature? It's Does same arri M or joker ? I don't know why it's cheap! Thanks all Edited May 31, 2020 by Ahmed Dhahyan
Michael Rodin Posted June 1, 2020 Posted June 1, 2020 Old Arri Apollo fresnels have actually got better photometrics than newer Compact and D-series thanks to bigger lenses. Color depends solely on the globe, and these lights use the ubiquitous double-ended HMI. Beware of old Arrisuns - the 575 with a PAR36 and the 1200 with a PAR64 lamp. Both globes are extremely rare and a conversion to MSR is usually not worth it.
Premium Member Phil Rhodes Posted June 1, 2020 Premium Member Posted June 1, 2020 I'm not familiar with the specific lights you mention, but older HMIs are likely to use a magnetic ballast. This means they may flicker at certain frame rates, though they're still usable with care. P
Ahmed Al Dhahyan Posted June 1, 2020 Author Posted June 1, 2020 8 hours ago, Michael Rodin said: Old Arri Apollo fresnels have actually got better photometrics than newer Compact and D-series thanks to bigger lenses. Color depends solely on the globe, and these lights use the ubiquitous double-ended HMI. Beware of old Arrisuns - the 575 with a PAR36 and the 1200 with a PAR64 lamp. Both globes are extremely rare and a conversion to MSR is usually not worth it. Thanks Michael and great informations. I don't know exactly what the name is, but what I mean in this picture
Ahmed Al Dhahyan Posted June 1, 2020 Author Posted June 1, 2020 So what do you think about this ballast! It's same power gems and new arri ballast? https://www.google.com/search?q=arri+6kw+ballast&tbm=isch&ved=2ahUKEwiGvfaD-eDpAhVPQRoKHauPBsMQ2-cCegQIABAC&oq=arri+6kw+&gs_lcp=ChJtb2JpbGUtZ3dzLXdpei1pbWcQARgCMgQIIxAnMgQIIxAnMgQIIxAnULZMWLZMYLNkaABwAHgAgAGxAYgBsQGSAQMwLjGYAQCgAQE&sclient=mobile-gws-wiz-img&ei=liDVXoaaE8-CaaufmpgM&bih=699&biw=360&prmd=isvn&safe=strict&hl=en#imgrc=vffv7ktyNOIsiM&imgdii=Dbo989JoGz74HM
Brian Doran Posted June 1, 2020 Posted June 1, 2020 That is a magnetic ballast. Like Phil said, you will have to be sure to synchronize with your camera to avoid flickering, and will not be able to dim the fixture, etc.
Ahmed Al Dhahyan Posted June 1, 2020 Author Posted June 1, 2020 Thanks for your attention Phil. Yes You're right , that's what I want to know. When I want to footage 24fps it's any problem with old ballast. Actually I'm no need more than a 24fps
Ahmed Al Dhahyan Posted June 1, 2020 Author Posted June 1, 2020 Thank you Brian, exactly That's what I was afraid of
Ahmed Al Dhahyan Posted June 1, 2020 Author Posted June 1, 2020 (edited) That's mean old magnetic ballast Unfit at this time Edited June 1, 2020 by Ahmed Dhahyan
Premium Member Mark Kenfield Posted June 1, 2020 Premium Member Posted June 1, 2020 29 minutes ago, Ahmed Dhahyan said: Thanks for your attention Phil. Yes You're right , that's what I want to know. When I want to footage 24fps it's any problem with old ballast. Actually I'm no need more than a 24fps Should work just fine at 24fps. It's an old light though. Service, parts, and possibly even bulbs may be difficult to get your hands on. So it's important to keep that in mind. Nothing wrong with old lights that work though.
Heikki Repo Posted June 1, 2020 Posted June 1, 2020 Keep also in mind that old lights might have asbestos in them.
Ahmed Al Dhahyan Posted June 1, 2020 Author Posted June 1, 2020 I was looking for solutions that advance daylight beautifully and perfect at medium cost. LTM Cinepar He was in my interest but also Most of them are consumed. absolutely we should have a good budget when we looking forward to HMI a good. I liked alpha and joker, i don't know but I feel something different with those groups.
Ahmed Al Dhahyan Posted June 1, 2020 Author Posted June 1, 2020 Hi Mark, Yeah, we'll find it hard to get the pieces. I appreciate that advice from you
Ahmed Al Dhahyan Posted June 1, 2020 Author Posted June 1, 2020 4 hours ago, Heikki Repo said: Keep also in mind that old lights might have asbestos in them. I don't know anything before about that! Many thanks Heikki and thank you for advise
Michael Rodin Posted June 2, 2020 Posted June 2, 2020 15 hours ago, Ahmed Dhahyan said: Thanks Michael and great informations. I don't know exactly what the name is, but what I mean in this picture It's an Apollo 6000. I'd inspect the springs that hold the globe - they get cracked sometimes. That ballast was made by IREM of Italy. As far a I remember, there were even two-phase (2L+N+PE) balasts in the wild. Is your one- or two-phase?
Ahmed Al Dhahyan Posted June 2, 2020 Author Posted June 2, 2020 Hi Michael, I don't have more info about Electrical lines, but what I know in my region just 1single phase or 3phase 220v
Nick Gardner Posted June 7, 2020 Posted June 7, 2020 The old arri HMI fresnells are great lights. I used to have 4 6ks, 6 4ks, and 3 or 4 2500s. The magnetic ballasts work just fine as far as you play by the rules as far as frame rates go. They are also really, really reliable. I did a shoot in Europe for 6 months. We shipped a container of these old HMIs over there and ran them nonstop in the sleet and rain, and they never missed a beat. Light quality is excellent. They are quite happy to run on modern electronic ballasts as well. They are big and heavy, but a 4k can be put up on a stand by one guy if you do it right. Put the light on the ground with the yoke parallel to the ground, put the yoke in the stand, and walk it up from the head. Definitely easier with two guys, but doable. The quality of light out of a big fresnel is hard to beat. Nick 1
Ahmed Al Dhahyan Posted June 10, 2020 Author Posted June 10, 2020 On 6/8/2020 at 2:01 AM, Nick Gardner said: The old arri HMI fresnells are great lights. I used to have 4 6ks, 6 4ks, and 3 or 4 2500s. The magnetic ballasts work just fine as far as you play by the rules as far as frame rates go. They are also really, really reliable. I did a shoot in Europe for 6 months. We shipped a container of these old HMIs over there and ran them nonstop in the sleet and rain, and they never missed a beat. Light quality is excellent. They are quite happy to run on modern electronic ballasts as well. They are big and heavy, but a 4k can be put up on a stand by one guy if you do it right. Put the light on the ground with the yoke parallel to the ground, put the yoke in the stand, and walk it up from the head. Definitely easier with two guys, but doable. The quality of light out of a big fresnel is hard to beat. Nick nice experience Nick, absolutely this is a matter that needs to be identified what we want to do. I think old arri HMI right for me, but I should be to change magnetic to new ballast
Premium Member Phil Rhodes Posted June 11, 2020 Premium Member Posted June 11, 2020 Bear in mind the ballasts are expensive; I'm not sure that buying a light with a magnetic ballast and replacing it with a more modern one would be very cost-effective.
Ahmed Al Dhahyan Posted June 11, 2020 Author Posted June 11, 2020 3 hours ago, Phil Rhodes said: Bear in mind the ballasts are expensive; I'm not sure that buying a light with a magnetic ballast and replacing it with a more modern one would be very cost-effective. Yes, of course it's very expensive, but so I can run 6k safely and easily, it needs that. That really requires thinking
Ahmed Al Dhahyan Posted June 11, 2020 Author Posted June 11, 2020 In general, we all know that the price of the ballast is equivalent to the price of the head light
Ahmed Al Dhahyan Posted June 11, 2020 Author Posted June 11, 2020 (edited) But I really want to know it's safe to use the old magnetic. cause danger like the explosion or like that? Because the circuits could be obsolete? Edited June 11, 2020 by Ahmed Dhahyan
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