New site at OPTEX
- Thread starter Michael_Bott
- Start date
Gibby
Red Savant
Thanks Michael. It's good to have another site with info on the HD100, not to mention the interesting shots of potential lens setups! I joined their chat group yesterday. Hopefully there will be alot of new information from them in the future. There is a PDF version of a preliminary brochure for the HD100 on the site that has some info on the camera and deck. The pathway to it is: Simon's HD100 Blog, HD100 Brochure Now Available, hd100leaflet (hyperlinked at the end of the sentence)
Gibby
www.cut4.tv
Gibby
www.cut4.tv
Film_is_dead
Member
mm
mm
Anyone knows how a 50mm Nikon lens will change if u put it on the gy-hd100u?
From 50mm how many mm's it'll become?
I have an awsome 10.5 mm lenz for the D100 Nikon n m crazy to find out if can get it on the GY with that adaptor from optex.
zank u all
mm
Anyone knows how a 50mm Nikon lens will change if u put it on the gy-hd100u?
From 50mm how many mm's it'll become?
I have an awsome 10.5 mm lenz for the D100 Nikon n m crazy to find out if can get it on the GY with that adaptor from optex.
zank u all
Barry_Green
Moderator
It'll become 50mm.
Look at the HD100's lens, and zoom it to 50mm. Then pull of the HD100's lens, put the Nikon 50mm on, and you'll see the exact same field of view.
It won't look like it did on the still camera, no. But a 50mm still lens on a 1/3" video camera will look the same as a 50mm video lens on that same 1/3" camera.
Look at the HD100's lens, and zoom it to 50mm. Then pull of the HD100's lens, put the Nikon 50mm on, and you'll see the exact same field of view.
It won't look like it did on the still camera, no. But a 50mm still lens on a 1/3" video camera will look the same as a 50mm video lens on that same 1/3" camera.
Panasonic and JVC are sister companies - both owned by Matsushita.redindian said:pana and JVC are playing a cruel tease with us! i wish they merge like Adobe+Macromedia... and give us a PanaJVC HVX200-HD100 for $7,999
This is probably why the two products are very different. They are covering all the bases - and Matsushita wins either way!
Film_is_dead
Member
Barry_Green said:
Are you sure? I'm new to HD with the GYHD100u I got few days ago, I used an adaptor to put Nikon lens on the XL1s but I was quickly disappointed to find that the 15mm Nikon lens became 37mm (in Nikon 35mm camera conversion comparisson).
So you mean that the 10.5 mm lens from my D100 can actually become a fisheye for the JVC?
zank u, I appreciate very much your info!
Film_is_dead said:
What Barry meant was that your 10.5mm will look something closer to the FOV of a 50mm lens on a 35mm motion picture camera. Alternatively, it will probably look more like a 75mm on a Nikon SLR.
However, if you stick a 50mm lens on, it will have the equivalent 35mm FOV of around a 350mm on a Nikon SLR.
I'm using a "magnification factor" of 7.3x. Of course, there is nothing really being magnified, it is being cropped. I calculated this by dividing 35mm horizontal width for a still photo aperature by 4.8mm width of 1/3" CCD.
If you wanted to compare standard 35mm motion picture aperature, then divide 20.96mm by 4.8mm for a factor of 4.4x.
This is all assuming their adapter compensates for the difference in flange focal distance (31mm for JVC 1/3" and 46.5mm for Nikon) between the lens types.
Barry's suggestion of setting the Fujinon lens to the same focal lengths of the Nikon lenses you own to preview the field-of-view rings true. Focal length is focal length - it is the FOV that changes using different sizes of CCD/aperature.
Film_is_dead
Member
Thank you for the very informative and kind answer.
Do you know how the new 13x lens for the same HD100u they made ( Fujinon) translates to a 35mm Nikon Camera?
I'm new to HD and I will need a wide angle to fisheye hd lens. With fisheye I hope Century Optics will make something nice as they did for the HD Z-Sony. I am learning..
thank u and Barry.
ted
Do you know how the new 13x lens for the same HD100u they made ( Fujinon) translates to a 35mm Nikon Camera?
I'm new to HD and I will need a wide angle to fisheye hd lens. With fisheye I hope Century Optics will make something nice as they did for the HD Z-Sony. I am learning..
thank u and Barry.
ted
where is this menu screen? i can´t see any botton for this screen with big TC.
http://www.prohd.co.uk/page6/page3/files/page3-1020-full.html
http://www.prohd.co.uk/page6/page3/files/page3-1020-full.html
Barry_Green
Moderator
I guess I missed the updates on this thread.
Okay, here's what I meant -- how a still-camera lens looks on a 35mm still camera is completely unrelated to how it will look on a 1/3" video camera. A millimeter is a millimeter. If you take a 50mm lens from a Nikon SLR and mount it to the JVC HD100, it will look exactly the same as if you'd just zoomed the standard JVC Fujinon lens to 50mm.
The still-camera will have a totally different field of view, but that's due to the way the still camera sees the frame. A 50mm lens on a 1/3" camera is going to look like a 50mm lens on a 1/3" camera, whether that lens is a TV Zoom lens or a still-camera lens or a cine camera lens or any other type of lens. 50mm is 50mm.
Now, 50mm on a 1/3" camera implies a *very* different field of view as compared to a 50mm lens on an SLR. So you simply cannot try to equate the two. Just look at it in terms of the stock lens. The stock lens is 5.5mm to 88mm. If you take an 8mm Peleng lens from a still camera (where it acts as a circular fisheye) and mount it to the JVC, it'll look like you zoomed in a little bit on the JVC's stock lens (to 8mm, actually).
If I can figure a way to mount 'em, I'll try it with my still-camera lenses... maybe I can fashion some sort of cheeseball black-wrap flange and at least start the speculation on how good it may or may not look...
Okay, here's what I meant -- how a still-camera lens looks on a 35mm still camera is completely unrelated to how it will look on a 1/3" video camera. A millimeter is a millimeter. If you take a 50mm lens from a Nikon SLR and mount it to the JVC HD100, it will look exactly the same as if you'd just zoomed the standard JVC Fujinon lens to 50mm.
The still-camera will have a totally different field of view, but that's due to the way the still camera sees the frame. A 50mm lens on a 1/3" camera is going to look like a 50mm lens on a 1/3" camera, whether that lens is a TV Zoom lens or a still-camera lens or a cine camera lens or any other type of lens. 50mm is 50mm.
Now, 50mm on a 1/3" camera implies a *very* different field of view as compared to a 50mm lens on an SLR. So you simply cannot try to equate the two. Just look at it in terms of the stock lens. The stock lens is 5.5mm to 88mm. If you take an 8mm Peleng lens from a still camera (where it acts as a circular fisheye) and mount it to the JVC, it'll look like you zoomed in a little bit on the JVC's stock lens (to 8mm, actually).
I wouldn't doubt that someone will create a lens mount adapter that would let you use 35mm SLR lenses on the HD100. As to whether it would be "better", that remains to be seen. I don't know whether we can expect SLR lenses to have the same resolving power (in terms of line-pairs per millimeter) as a lens engineered specifically for a 1/3" HD CCD.
If I can figure a way to mount 'em, I'll try it with my still-camera lenses... maybe I can fashion some sort of cheeseball black-wrap flange and at least start the speculation on how good it may or may not look...
Barry_Green
Moderator
Just as a follow-up -- it's definitely possible to make an adapter for still-camera lenses. I just held my 20mm CZJ M42 lens in front of the camera and got an image off it, there's plenty of room to design a mechanical fitting. Should be fairly inexpensive as well since it's just a mechanical piece.
C-mount is a different issue. JVC's announced that they'll be making a c-mount adapter, but a simple mechanical adapter won't work. The lens gets mounted too far away from the chips. They'll have to incorporate an optical element in order to make a c-mount adapter work.
C-mount is a different issue. JVC's announced that they'll be making a c-mount adapter, but a simple mechanical adapter won't work. The lens gets mounted too far away from the chips. They'll have to incorporate an optical element in order to make a c-mount adapter work.
Mediacre said:
Barry_Green said:
I remember hearing the JVC C-mount rumour a month ago, but I can't find any sort of press release or official JVC info on it.
A C-mount lens back flange distance is 17.5mm, and the JVC 1/3" bayonet is 31mm (in air.) So that means that the C-mount lens needs to sit inside the body of the HD100 about 13.5mm to match the rear flange distance. Unfortunately, there simply isn't enough room to do it and use a C-mount lens the way you would on a bolex.
However, in my limited testing doing the same thing with the XL2, I have found that my 25mm Switar C-mount makes an amazing macro lens when mounted at around 40mm back flange distance.
I am getting to work creating a C-mount adapter that will mount at 31mm (same flange as the stock JVC lens) so I can use this macro ability as a relay lens for a homemade "mini35."
Here's a couple screen grabs from my PAL XL2 using the Switar 25mm. The minimum object distance (MOD) was about 1.5 inches!
These images aren't as sharp as they should be because they were all handheld at 1/50th shutter. I wish I had increased the shutter speed when I did this test.
Barry_Green
Moderator
The c-mount rumor came about because I found it mentioned in a brochure on the JVC Australia website. Then at the WEVA expo I asked Tim Tokita of JVC about it and he confirmed that yes, they are developing a c-mount adapter. I asked about the flange distance situation and he said "oh, yes, there will be an optical element in it to correct for that."