|
pc
newsgroups
|
|||||||||||||||||||||||
|
|||||||||||||||||||||||
Video camera lense questionsmodel number on the lens itself, but the zoom unit mounted on the side of the lens says: Fujinon S20 x 6.4 BRM-SD 1:1.4 / 6.4-128mm I don't know what all that means yet. The lens has holes that look like they have threaded inserts in them, for securing the manual focus unit etc to the lense with a bolt. If they really are inserts in the holes, is it possible to replace them? We have some that are broken off at the outer end, so the bolt will no longer reach it. Also, is it possible to get an iris control to mount on the tripod handles? We have one for zoom and focus, and it would be great to have one for iris too. Thanks for any help! David On Jul 30, 2:40 pm, dh@. wrote:
> We have JVC GY-DV500 cameras. I couldn't find a It means that it's a 20:1 zoom lens.> model number on the lens itself, but the zoom unit > mounted on the side of the lens says: > > Fujinon S20 x 6.4 BRM-SD > 1:1.4 / 6.4-128mm > I don't know what all that means yet. It also means that whoever you bought the cameras from had the foresight to buy good lenses as the stock lens sucked. > The lens has If it's anything like the holes on the lens on my Canon (on a JVC> holes that look like they have threaded inserts in them, > for securing the manual focus unit etc to the lense with > a bolt. If they really are inserts in the holes, is it possible > to replace them? We have some that are broken off at > the outer end, so the bolt will no longer reach it. 550), they're not inserts but actual drilled holes. > Also, is it possible to get an iris control to mount on The only lens I could find on the Fuji site that's close to your> the tripod handles? We have one for zoom and > focus, and it would be great to have one for iris too. number is an S20X6.4BMD at http://fujinon.com/Broadcast/Product.aspx?cat=73&id=222 If you go to the Accessories page, it shows 3 different lens controllers. You'd have to check with a local broadcast equipment rep or a Fuji rep to confirm whether they're able to be mounted on a tripod handle though. My guess is no :-( Mike dh@. wrote:
> We have JVC GY-DV500 cameras. I couldn't find a It is the model number and contains several key pieces of> model number on the lens itself, but the zoom unit > mounted on the side of the lens says: > > Fujinon S20 x 6.4 BRM-SD > 1:1.4 / 6.4-128mm > > I don't know what all that means yet. the specification (such as the zoom ratio, minimumm F- stop, type of camera attachment, etc.) It is easy enough to decode these numbers by browsing the Fujinon website. > The lens has It might be possible that they used something like> holes that look like they have threaded inserts in them, > for securing the manual focus unit etc to the lense with > a bolt. If they really are inserts in the holes, is it possible > to replace them? We have some that are broken off at > the outer end, so the bolt will no longer reach it. "Helicoil" thread inserts which allow you to replace the threads. But you may have to consider having the lens repaired by Fujinon or some experienced lens technician as they are too delicate and expensive to trust to your average mechanic:-) > Also, is it possible to get an iris control to mount on Why? They don't typically provide iris controls for the> the tripod handles? We have one for zoom and > focus, and it would be great to have one for iris too. camera operator (for a number of reasons). The iris is usually controlled electronically by the camera (or remotely by the camera control unit, etc.) The camera operator is rarely able to properly judge/adjust the iris which is why we usually either use the automatic exposure function of the camera (in single-camera shooting situations), or a person back in the control location will adjust the iris (and other parameters) of all the cameras in a multi-camera production. Some cameras have a small control panel that you can plug in which include the iris control and can be mounted on the tripod arms. For example I have a Sony RM-M7G control unit for my Sony DSR-300 camera. Here is a picture... http://www.globalmediapro.com/av/attach/192/index-1391.jpg The iris control is the large black knob in the lower right. Richard Crowley wrote:
Show quote > dh@. wrote: Hey there Richard. Please take no offense but my thoughts of iris and >> We have JVC GY-DV500 cameras. I couldn't find a >> model number on the lens itself, but the zoom unit >> mounted on the side of the lens says: >> >> Fujinon S20 x 6.4 BRM-SD >> 1:1.4 / 6.4-128mm >> >> I don't know what all that means yet. > > It is the model number and contains several key pieces of > the specification (such as the zoom ratio, minimumm F- > stop, type of camera attachment, etc.) It is easy enough > to decode these numbers by browsing the Fujinon website. > >> The lens has >> holes that look like they have threaded inserts in them, >> for securing the manual focus unit etc to the lense with >> a bolt. If they really are inserts in the holes, is it possible >> to replace them? We have some that are broken off at >> the outer end, so the bolt will no longer reach it. > > It might be possible that they used something like > "Helicoil" thread inserts which allow you to replace the > threads. But you may have to consider having the lens > repaired by Fujinon or some experienced lens technician > as they are too delicate and expensive to trust to your > average mechanic:-) > >> Also, is it possible to get an iris control to mount on >> the tripod handles? We have one for zoom and >> focus, and it would be great to have one for iris too. > > Why? They don't typically provide iris controls for the > camera operator (for a number of reasons). The iris is > usually controlled electronically by the camera (or > remotely by the camera control unit, etc.) The camera > operator is rarely able to properly judge/adjust the iris > which is why we usually either use the automatic > exposure function of the camera (in single-camera > shooting situations), or a person back in the control > location will adjust the iris (and other parameters) of > all the cameras in a multi-camera production. cam op are much different than yours. The above would work for a completely inexperienced operator but I insist my cam ops have a good understanding of what they're looking at. You have dual zebra bars as do I. In the office I have a ccu and a scope/waveform and have adjusted my zebras to where I can tell you within 2 lumens where my exposure is any where on an image. This way when I'm running and gunning I know just where the levels are. I'm such a dope that while shooting I'll see a background highlight and make a guess and compare it on scope when I get back to the office. I do confess that I keep a CCU in my production rig but only use it to quickly match other cameras. :/> Show quote > > Some cameras have a small control panel that you can > plug in which include the iris control and can be mounted > on the tripod arms. > > For example I have a Sony RM-M7G control unit for my > Sony DSR-300 camera. Here is a picture... > http://www.globalmediapro.com/av/attach/192/index-1391.jpg > The iris control is the large black knob in the lower right. > Bill Fright wrote:
> Hey there Richard. Please take no offense but my thoughts of iris and No offense taken. There is clearly a wide range of POVs> cam op are much different than yours. The above would work for a > completely inexperienced operator but I insist my cam ops have a good > understanding of what they're looking at. and production experiences here. I'm lucky to find camera ops that can tell pan from zoom. And, of course, we have no clue where the OP is coming from. Richard Crowley wrote:
> Bill Fright wrote: Man, that must be very frustrating for you. We have a huge University >> Hey there Richard. Please take no offense but my thoughts of iris and >> cam op are much different than yours. The above would work for a >> completely inexperienced operator but I insist my cam ops have a good >> understanding of what they're looking at. > > No offense taken. There is clearly a wide range of POVs > and production experiences here. I'm lucky to find camera > ops that can tell pan from zoom. And, of course, we have > no clue where the OP is coming from. > here in Austin that pump out cam ops by the bus load. On Thu, 02 Aug 2007 07:45:03 -0700, Richard Crowley <rcrow***@xprt.net> wrote:
Show quote >dh@. wrote: That's what I'm hoping.>> We have JVC GY-DV500 cameras. I couldn't find a >> model number on the lens itself, but the zoom unit >> mounted on the side of the lens says: >> >> Fujinon S20 x 6.4 BRM-SD >> 1:1.4 / 6.4-128mm >> >> I don't know what all that means yet. > >It is the model number and contains several key pieces of >the specification (such as the zoom ratio, minimumm F- >stop, type of camera attachment, etc.) It is easy enough >to decode these numbers by browsing the Fujinon website. > >> The lens has >> holes that look like they have threaded inserts in them, >> for securing the manual focus unit etc to the lense with >> a bolt. If they really are inserts in the holes, is it possible >> to replace them? We have some that are broken off at >> the outer end, so the bolt will no longer reach it. > >It might be possible that they used something like >"Helicoil" thread inserts which allow you to replace the >threads. >But you may have to consider having the lens Maybe I'll take it by Wolf Camera or something just>repaired by Fujinon or some experienced lens technician >as they are too delicate and expensive to trust to your >average mechanic:-) to see what those guys say about it. >> Also, is it possible to get an iris control to mount on We tried, but the camera likes it too dark. Is it >> the tripod handles? We have one for zoom and >> focus, and it would be great to have one for iris too. > >Why? They don't typically provide iris controls for the >camera operator (for a number of reasons). The iris is >usually controlled electronically by the camera possible to adjust how light or dark the auto iris function makes it? >(or We're not set up for that. We're projecting whatever>remotely by the camera control unit, etc.) The camera >operator is rarely able to properly judge/adjust the iris >which is why we usually either use the automatic >exposure function of the camera (in single-camera >shooting situations), or a person back in the control >location will adjust the iris (and other parameters) of >all the cameras in a multi-camera production. band we have on stage up onto some big screens, so we can see the result. The lighting isn't even across the stage, so in order to get decent shots we have to be able to control the iris. One guy is sitting on a riser running his camera, and is in an easy position to reach the lens. I'm standing on the floor running the switcher and the other camera which is also on a riser, so I can't reach the lens. I can zoom and focus with the same hand I'm moving the camera with, but in order to adjust the iris I have to get up on the riser which is a real pain in the ass. Getting iris control down on the tripod arm too would make it great. Show quote >Some cameras have a small control panel that you can >plug in which include the iris control and can be mounted >on the tripod arms. > >For example I have a Sony RM-M7G control unit for my >Sony DSR-300 camera. Here is a picture... >http://www.globalmediapro.com/av/attach/192/index-1391.jpg >The iris control is the large black knob in the lower right. <dh@.> wrote ...
> Richard Crowley wrote: I'm pretty certain that is adjustable. If not in the user->>Why? They don't typically provide iris controls for the >>camera operator (for a number of reasons). The iris is >>usually controlled electronically by the camera > > We tried, but the camera likes it too dark. Is it > possible to adjust how light or dark the auto iris > function makes it? accessible menus somewhere, then most likely an adjustment a service technican can make. dh@. wrote:
> My 550s (successor to yours) have a 3-position switch on the side > We tried, but the camera likes it too dark. Is it > possible to adjust how light or dark the auto iris > function makes it? labeled something like Spotlight/Normal/Backlight. The setting of this switch affects auto iris operation. Try the Spotlight mode and see if this helps. Mike  |
|||||||||||||||||||||||
Other interesting topics