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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

Any owners of the chinese tungsten fresnels that can help with some questions please?

Q...Can I ask, have you tried down lamping them at all? Is there any reason why it shouldn't work?

A....I have not tried downlamping them. There have been times when I would have liked to do so but did not stock up with lower wattage globes.

Q...I saw in one of the threads you mentioned you got better light stands and C-stands. Can I ask where you got them from? I'm in the market for a c-stand and some better light stands and being in Australia (as you know) make's it difficult and expensive.

A....The same vendor, Steven Studio will sell you all-steel/iron C-Stands. The shiny junction bits look like alloy casting but are chrome-finished castiron, leastways on my specimens. They may have changed since. The swing-around legs are cammed. You do not have to unscrew anything unless you want to remove the entire base legs assembly from the post.

They are easiest to re-stow by turning the stand upside-down with the top at your foot and pulling two arms around towards you.

The 2K size light stand is constructed in similar style to the C-stand. There is a hollwed spigot receiver in the top. This as I mention is an unfinish casting corehole, tapered to permit release of the core pattern. The top of the light stand also has a small retractable pin for mounting smaller lights like 800watt redheads or the 650watt lights.

You may have to request them off-eBay with a private message through eBay.
Not all of his stuff is listed. The guy calls himself Steven Fu.

The same vendor can also sell you AB-style or V-Mount style batteries with travel charger. He will even sell you a 6K/12K HMI electronic powerfactor corrected "as ARRI" ballast. I may keep this in mind if the 12K Lightmaker Ballast gasps its last. Thus far, with appropriate care, it has been fine. For now at least I do not need to examine that option. Don't ask me how I happened to possess a 12K HMI light. It is a long story, involves incompetence, is apparently started something of an urban myth but had a happy ending.

Steven Studio's prices are not as cheap as other Chinese vendors.


As for fresnel lenses, yes they seem more tender than others from ARRI. When I use the 650watt lamps, I take care not to flood as wide as the lamps will go but to adjust to the end then move it back a little. The clasps on the rear of the glasses are rather crude and tipped with silicone tube. I initally backed the screws off a fraction and locktited them so that glasses are almost slightly loose. The screws are a dog to get at. I subsequently bent the little clasps so I could tighten the screws themselves down to security.

It is not ideal and one should not have to do workarounds with new stuff. Since I did that, the only light which broke a glass was due to it being operated almost vertically up towards the ceiling in flood-bounce and that is just asking for it with any lamp. I am fairly practically skilled so it is not a big deal for me but for anyone who does not have practical skills, shepherding the Chinese lights may not be their cup of tea.

Voltage....The internal wiring gauge and the feeder cable apear to be adequate for task and have caused no problems. The cables are rubber insulated and may develop a white powdery bloom. An old-school method to conserve rubber cables is to periodically brush ordinary bathroom talcum powder on them. They may be less likely then to have a coil catch on one spot and chafe through. If nothing else, they should smell sweet.

Always get an electrician to rewire Australian plugs onto them. The Chinese plugs although pinned the same as ours are for power outlets set high on walls, not low on the skirts like ours are. The cords come downward out of the lower side of the plug body. They are quite sensible in that they sit flatter to a wall but are far more easily damaged from cords pulling up short or just being yanked. Tjhe Chinese plugs are much lighter and less likely to take your eye out when they baulk then come free when the cable is yanked - BUT - we are good practitioners and don't do that do we.
 
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Blake, Yes every tungsten bulb should be fused with their appropriate fuse, so ideally you would use a smaller fuse for 300W (e.g. 2A for 300w and 3.15A for 650W @240Volts)
Regarding the light output it depends on the reflector design and surface, hard to say x wattage its the same output as y Wattage. I general fresnels are less efficient because they only use the light that is hitting the fresnel lens plus the counterpart that is hitting the mirror (and is reflected back to the filament and thus towards the fresnel lens), all the other part is lost in the dark inner housing. I´d think it is safe to say at least 1 stop. You might ask local rental places, they often sell used equipment, too. Good luck!

Cheers

Ulf

Ok Ulf thanks for that!

Q...Can I ask, have you tried down lamping them at all? Is there any reason why it shouldn't work?

A....I have not tried downlamping them. There have been times when I would have liked to do so but did not stock up with lower wattage globes.

Q...I saw in one of the threads you mentioned you got better light stands and C-stands. Can I ask where you got them from? I'm in the market for a c-stand and some better light stands and being in Australia (as you know) make's it difficult and expensive.

A....The same vendor, Steven Studio will sell you all-steel/iron C-Stands. The shiny junction bits look like alloy casting but are chrome-finished castiron, leastways on my specimens. They may have changed since. The swing-around legs are cammed. You do not have to unscrew anything unless you want to remove the entire base legs assembly from the post.


Thanks for that. I wonder if the C-stands, and light stands, are the same as the Came-TV ones as well. Maybe, like the fresnels, they all just rebrand the same ones.

Do yours look like these c-stands:

http://www.came-tv.com/2sets33m-studio-centry-c-stand-detachable-light-cstand-p-353.html

and these light stands:

http://www.came-tv.com/1-x-stands-max-work-24m-only-for-our-buyer-p-364.html

Robert Hart said:
They are easiest to re-stow by turning the stand upside-down with the top at your foot and pulling two arms around towards you.

The 2K size light stand is constructed in similar style to the C-stand. There is a hollwed spigot receiver in the top. This as I mention is an unfinish casting corehole, tapered to permit release of the core pattern. The top of the light stand also has a small retractable pin for mounting smaller lights like 800watt redheads or the 650watt lights.

You may have to request them off-eBay with a private message through eBay.
Robert Hart said:
Not all of his stuff is listed. The guy calls himself Steven Fu.


I found his ebay page I think, steven-studio-china - http://stores.ebay.com.au/steven-studio-china

I'll send him a message. Thanks!

Robert Hart said:
The same vendor can also sell you AB-style or V-Mount style batteries with travel charger. He will even sell you a 6K/12K HMI electronic powerfactor corrected "as ARRI" ballast. I may keep this in mind if the 12K Lightmaker Ballast gasps its last. Thus far, with appropriate care, it has been fine. For now at least I do not need to examine that option. Don't ask me how I happened to possess a 12K HMI light. It is a long story, involves incompetence, is apparently started something of an urban myth but had a happy ending.

I read about your 12k light in the DV threads. At least you're getting use out of it?

Robert Hart said:
Steven Studio's prices are not as cheap as other Chinese vendors.


As for fresnel lenses, yes they seem more tender than others from ARRI. When I use the 650watt lamps, I take care not to flood as wide as the lamps will go but to adjust to the end then move it back a little. The clasps on the rear of the glasses are rather crude and tipped with silicone tube. I initally backed the screws off a fraction and locktited them so that glasses are almost slightly loose. The screws are a dog to get at. I subsequently bent the little clasps so I could tighten the screws themselves down to security.

I was planning to loosen the glass as well in the same way if I did end up getting them.

So can you go full flood with the 2K and 1K and the other ones? (300, 150)

Robert Hart said:
It is not ideal and one should not have to do workarounds with new stuff. Since I did that, the only light which broke a glass was due to it being operated almost vertically up towards the ceiling in flood-bounce and that is just asking for it with any lamp. I am fairly practically skilled so it is not a big deal for me but for anyone who does not have practical skills, shepherding the Chinese lights may not be their cup of tea.

Voltage....The internal wiring gauge and the feeder cable apear to be adequate for task and have caused no problems. The cables are rubber insulated and may develop a white powdery bloom. An old-school method to conserve rubber cables is to periodically brush ordinary bathroom talcum powder on them. They may be less likely then to have a coil catch on one spot and chafe through. If nothing else, they should smell sweet.

Haha! Ok, so the talc wont burn? I shall remember this.

Robert Hart said:
Always get an electrician to rewire Australian plugs onto them. The Chinese plugs although pinned the same as ours are for power outlets set high on walls, not low on the skirts like ours are. The cords come downward out of the lower side of the plug body. They are quite sensible in that they sit flatter to a wall but are far more easily damaged from cords pulling up short or just being yanked. Tjhe Chinese plugs are much lighter and less likely to take your eye out when they baulk then come free when the cable is yanked - BUT - we are good practitioners and don't do that do we.

I'm fairly certain they ship them with the plugs for the country you are in.

On a related note, I noticed there are some "upgraded" arri knock off fresnels floating around ebay.They list the upgrades as:

"At the request of many customers, we update several details for the light.

make the product more safe, durable, user-friendly, and improve the whole technology."


5 metre power cable
upgraded lock knob
upgraded screen
thicker brack and hang cable (on the yoke)
Alluminum alloy connector
upgraded zoom knob
upgraded plug

http://www.ebay.com.au/itm/Upgrade-...889674?hash=item3ab4f26d0a:g:Q0AAAOSwo0JWLyxf
 
The CAME C-stands look very similar with the black foam grip near the top. The thumbscrews are a slightly different style. The legs appear the same arrangement. The C-Stands from Steven Studio have thin "O" rings on the shafts so that when they are slipped close, they should not pin a fold of skin on you hand and give you a blood blister. Take care not to let them slam down. They can still give you a bit of a surprise, just like the more expensive ones can. Best practice keeps you safe.

The CAME light stands appear to be a better product than mine which use thin friction plates in receivers and a singe thumbscrew fitted radially to push them in against the extending shaft. It is a good method but underdeveloped in my stands. The "better" light stand was actually a "bigger" light stand and of heavier construction in the general style of the C-Stands but with traditional spreading legs on a sliding centre to extend them.

The downside of external clamping on the CAME version is that eventually the inner diameter wears from the section sliding in and out. To get friction, the thumbscrew is screwed in furhtur until eventually the faces of the clamp butt and you have to file or hacksaw it out wide so it can clamp again, or the threaded piece cracks off.

They should last longer, even longer if you keep them clean of road dust.

Talcum powder is only for the rubber on the external power cord, not for any wiring inside the lamphouse.

The upgraded lock knob appears to be fibre-reinforced. Even the old ones should not be breaking if unless the Tarzans are overtightening. If there is slippage, a custom thin fibre washer should fix it. Even a cardboard washer cut from a thin piece of cereal packet will do it. Even with fibre reinforced plastic, the threaded metal section around which the plastic is moulded will evenutally tear out under Tarzan abuse.

Full flood on the 2K and the 1.2K HMI did not seem to bother them, only the knobs on the 2K deteriorated from heat and split. The attachment of the knobs on either type is adequate but barely. They are retained by the same method as stove knobs, with a thin leaf spring in the knob. It presses against a flat surface on the shaft.

The small lamps 100 and 300, I have not used so I can't speak for them.
 
The CAME C-stands look very similar with the black foam grip near the top. The thumbscrews are a slightly different style. The legs appear the same arrangement. The C-Stands from Steven Studio have thin "O" rings on the shafts so that when they are slipped close, they should not pin a fold of skin on you hand and give you a blood blister. Take care not to let them slam down. They can still give you a bit of a surprise, just like the more expensive ones can. Best practice keeps you safe.

The CAME light stands appear to be a better product than mine which use thin friction plates in receivers and a singe thumbscrew fitted radially to push them in against the extending shaft. It is a good method but underdeveloped in my stands. The "better" light stand was actually a "bigger" light stand and of heavier construction in the general style of the C-Stands but with traditional spreading legs on a sliding centre to extend them.

The downside of external clamping on the CAME version is that eventually the inner diameter wears from the section sliding in and out. To get friction, the thumbscrew is screwed in furhtur until eventually the faces of the clamp butt and you have to file or hacksaw it out wide so it can clamp again, or the threaded piece cracks off.

They should last longer, even longer if you keep them clean of road dust.

Talcum powder is only for the rubber on the external power cord, not for any wiring inside the lamphouse.

The upgraded lock knob appears to be fibre-reinforced. Even the old ones should not be breaking if unless the Tarzans are overtightening. If there is slippage, a custom thin fibre washer should fix it. Even a cardboard washer cut from a thin piece of cereal packet will do it. Even with fibre reinforced plastic, the threaded metal section around which the plastic is moulded will evenutally tear out under Tarzan abuse.

Full flood on the 2K and the 1.2K HMI did not seem to bother them, only the knobs on the 2K deteriorated from heat and split. The attachment of the knobs on either type is adequate but barely. They are retained by the same method as stove knobs, with a thin leaf spring in the knob. It presses against a flat surface on the shaft.

The small lamps 100 and 300, I have not used so I can't speak for them.

Thanks Robert, appreciated!
 
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