|
|
|
|
|
|
|||||||||
 |
|
|
Thread Tools | Search this Thread |
January 5th, 2005, 06:30 PM
|
#1 |
|
Major Player
Join Date: Dec 2004
Posts: 749
|
Just took apart an old 8mm camera - wow, I am confused?!?!
Ok, in my quest to try and understand how the Agus, Aldus and the mini35 work, I have been gathering lenses from all kinds of places to see how this all works.
The keystone XL200 camera, has a built in zoom lens - one that works like a superzoom where you can pull the little knob on the side to zoom in (they call it tele and wide respectively). Now, after taking it apart, I noticed that I cannot see through the lens at all (up close), but when I bring it far enough back, I can see through it (although it is really small). Now, there is also a piece that comes off the lens part that exposes me to the entire lens (japan made). This lens (and the tube part that gives the zoom/tele mode) is just a piece of glass from what I gather (which is strange to me). I thought the lenses were in the tube? Anyways, to make a long story short, I am confused again on how this all works. Help and suggestion from anybody would be great! |
|
|
|
January 6th, 2005, 05:02 PM
|
#2 |
|
New Boot
Join Date: Mar 2004
Location: Springfield, Missouri
Posts: 9
|
|
|
|
|
|
January 6th, 2005, 07:32 PM
|
#3 |
|
Major Player
Join Date: Dec 2004
Posts: 749
|
The website doesn't work?! Thank for the info, but it won't seem to connect.
|
|
|
|
|
January 7th, 2005, 12:05 AM
|
#4 |
|
New Boot
Join Date: Mar 2004
Location: Springfield, Missouri
Posts: 9
|
woa, i guess the site went down tonight. Hmm, well... know i feel stupid. sorry, little too much to drink. Try this one instead.
http://www.mediachance.com/dvdlab/dof/index.htm Hope this one helps, ;-) |
|
|
|
|
January 7th, 2005, 08:50 AM
|
#5 |
|
Wrangler
Join Date: Dec 2002
Location: Mays Landing, NJ
Posts: 11,802
|
Sean, I edited your post to activate the link. You can make your links "hot" this way:
[ url ]http://www.anywebsite.com[ /url ] Just remove the whitespace between the url tags and the brackets. |
|
|
|
|
January 7th, 2005, 03:33 PM
|
#6 |
|
Major Player
Join Date: Dec 2004
Posts: 749
|
Thanks, I already have that book marked but I am still confused. I guess it is going to take getting an actual 35mm camera and playing with it to figure this thing out. Thanks anyways,
|
|
|
|
|
January 7th, 2005, 04:21 PM
|
#7 |
|
Major Player
Join Date: Dec 2004
Posts: 749
|
By the Way, does anyone know who wrote that article on DOF or an email to get a hold of him/her? It is well laid out and very descriptive,
|
|
|
|
|
January 9th, 2005, 06:31 AM
|
#8 |
|
RED Code Chef
Join Date: Oct 2001
Location: Holland
Posts: 12,514
|
The depth-of-field also depends on the target size. 35mm creates
a shallower DoF than a 1/3" CCD size has for example. If you where to mount such a lens directly to a 1/3" CCD you will get a 7.2 times magnification since 35mm is 7.2 times as large. What a mini35 and homemade adapter do is project this 35mm image (at the correct size and distance from the lens) on a surface ([spinning] ground glass). Since this is a 35mm target image you retain the original DoF. All you now need to do is photograph this projected image which you do with a series of macro lenses (since the image is a lot smaller compared to the real world so to speak).... I hope this kinda explained it a bit.
__________________
Rob Lohman, visuar@iname.com DV Info Wrangler & RED Code Chef Join the DV Challenge | Lady X Search DVinfo.net for quick answers | Buy from the best: DVinfo.net sponsors |
|
|
|
|
| ||||||
|
||||||
|
|
