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October 20th, 2004, 10:53 AM
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#196 |
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Major Player
Join Date: Nov 2003
Location: cambridge ma
Posts: 247
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static adapter
hi everyone this is a still from a clip made with a filter tube version .the plcx is about 3mm away from the ground glass could not get sharp focus . this was made with 1500 grit ground glass
and 60mm fl 50mm plcx the camera is a one chipper. the tube system should correct the focal distance to the ground glass and allow the plcx to fit directly on the ground glass. great bokeh http://www.dvinfo.net/media/mellor/PDVD_540.BMP |
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October 20th, 2004, 02:14 PM
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#197 |
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New Boot
Join Date: Oct 2004
Location: Toronto
Posts: 16
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That looks pretty good to me. Is that from a static or oscillating glass? And is this the 1500 grit disk from Thorlab? I'm going to opt for their lens tubes as well . I just hope the threads actually fit a 50mm ring.
Jon |
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October 20th, 2004, 02:17 PM
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#198 |
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Major Player
Join Date: Oct 2003
Location: Southern Cal-ee-for-Ni-ya
Posts: 608
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This thread is not for static adapters.
While stills may be fun to look at, the only real test is moving footage with out of focus objects and a slow pan, full resolution at a minimum of 5 megabits/sec compressed data rate. That's where almost all of the adapters show the undesirable 'fixed pattern grain' that makes it unacceptable for work other than some kind of artsy fartsy dream sequence. -Les |
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October 20th, 2004, 03:48 PM
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#199 |
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Major Player
Join Date: Nov 2003
Location: cambridge ma
Posts: 247
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ocillating adapter
les I am building a ocillating adapter all of the static parts will be used in the final design this will be the design. camera lens c-mount tube , cage system back to tube . this is what a cage system looks like. the tolerences on this are .000005.
lens tube (2)$56 cage rod (4) $24 cage plates $60 . $140 total. the focal plane on this system would be perfect . We would all be able to build this together . with part numbers and test results .you could start with a static adapter and add on as designs become perfected http://www.thorlabs.com/NewGroupPage...ctGroup_ID=180 http://www.thorlabs.com/ProductDetai...roduct_ID=1480 http://www.thorlabs.com/NewGroupPage...ctGroup_ID=180 |
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October 20th, 2004, 08:56 PM
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#200 |
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Major Player
Join Date: Oct 2003
Location: Southern Cal-ee-for-Ni-ya
Posts: 608
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Richard,
Thor labs has some nice stuff! I have some of their mirror mounts for a laser project I was building. So the missing part is the part that causes the motion of the GG. Whatcha gunna use for that? That is the hardest part, in my experience. The eccentric. I'm glad someone else is trying this, I will be fun to compare notes! -Les |
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October 21st, 2004, 06:40 AM
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#201 |
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Regular Crew
Join Date: Sep 2003
Location: Brazil
Posts: 124
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Les,
is it possible for you to send me the e-mail with the info about the adaptor you are selling? i really want to buy it. thanks ciao |
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October 21st, 2004, 06:44 AM
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#202 |
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Regular Crew
Join Date: Sep 2003
Location: Brazil
Posts: 124
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forgot to tell my email adress.
danielaragao at gmail dot com ciao |
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October 21st, 2004, 07:43 AM
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#203 |
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Major Player
Join Date: Nov 2003
Location: cambridge ma
Posts: 247
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cage plates
the system I am working on is to fit ball bearings inside the cage plate. then shaft inside of the ball bearing. pulley system on the shafts. three plates, 12 ball bearings , 4 shafts . 8 pulleys . my plan is to test parts, before I tell people to buy them . the cool part is when the focal plane is made it will be right in front of a 50mm tube .precisely in line to the c-mount and lens. this has to get to the ground glass perfectly and be focused on from the camera perfectly. the tube on the front will most likley be 1 inch it will be tightened down on the cage plate @ the focal length needed for the 50mm lens about 1.4 inches get sharp focus and tighten tube down in the cage plate . don,t try boca bearing they are no way near as good as the kbc bearings I am using. already. got a motor from surplus shed for $4.50 . I promise to give complete parts list, and part numbers when this is finished . need to find out from thor labs about connecting the system to a camera c -mount I see one for the smaller tube , but not for the 2 inch tube yet . http://www.thorlabs.com/ProductDetai...oduct_ID=11138
http://www.thorlabs.com/NewGroupPage...ctGroup_ID=180 |
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October 21st, 2004, 08:35 AM
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#204 |
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Major Player
Join Date: Nov 2003
Location: cambridge ma
Posts: 247
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static to ocillating
I think the transition from static - ocllating parts list may look like this. 2 inch tube , 50mm ground glass ,50mm plcx 2 spacer rings
the plcx may be the only part that can,t be used in the ocillating model. the daily rental for a35mm adapter is$245. I think when we precisly ocillate the 1500 ground glass in this cage system we can make this equal to any device for less than $500. most of the used optical parts seem to retain at least half of there value on the used market . plus we will all be on the same page when building this . |
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October 21st, 2004, 10:19 AM
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#205 |
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Major Player
Join Date: Dec 2003
Location: Brooklyn, NY
Posts: 636
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And to think, this all started with a guy, a glue gun, and some parts around the house...anyone know where Agus is these days?
Those of you ordering from Thor, are these 2" tubes 2" in diameter? I'm wondering if I can use some of these parts to update my adapter, largely based around 2" PVC and coupling parts (slightly larger than 2"). I'm wondering if I could still slip this tube over the 58mm achromat I've got... - jim
__________________
Realism, anyway, is never exactly the same as reality, and in the cinema it is of necessity faked. -- J-L G |
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October 21st, 2004, 10:23 AM
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#206 |
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Major Player
Join Date: Nov 2003
Location: cambridge ma
Posts: 247
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museum
this is the camera development wing of our museum .
http://www.dvinfo.net/media/mellor/rmtopview.jpg http://www.dvinfo.net/media/mellor/rmfullview.jpg http://www.dvinfo.net/media/mellor/aldu-test-44.jpg http://www.dvinfo.net/media/mellor/3...ens%20test.jpg http://www.dvinfo.net/media/mellor/rmcameratop.jpg http://www.dvinfo.net/media/mellor/rmsonywalkman.jpg http://www.dvinfo.net/media/mellor/a...test%20002.jpg |
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October 21st, 2004, 11:39 AM
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#207 |
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Major Player
Join Date: Nov 2003
Location: cambridge ma
Posts: 247
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thorlabs
jim thorlabs is in your neck of the woods over there in N.J ... maybe a road trip?
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October 21st, 2004, 12:12 PM
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#208 |
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Major Player
Join Date: Jul 2004
Location: Phoenix, AZ - USA
Posts: 300
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Re: museum
<<<-- Originally posted by Richard Mellor : this is the camera development wing of our museum . -->>>
Richard, is the mounting system you're using a part that can be purchased or did you make it? |
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October 21st, 2004, 12:43 PM
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#209 |
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Major Player
Join Date: Nov 2003
Location: cambridge ma
Posts: 247
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thorlabs
the basic design is around this system . I have not recived all the parts yet. http://www.thorlabs.com/NewGroupPage...ctGroup_ID=180
http://www.thorlabs.com/ProductDetai...oduct_ID=36117 http://www.thorlabs.com/ProductDetai...roduct_ID=1481 |
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October 21st, 2004, 01:16 PM
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#210 |
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Major Player
Join Date: Nov 2003
Location: cambridge ma
Posts: 247
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these five components may be all you need for a static adapter.
As I said before I plan on using all the parts in the ocillating adapter except the plcx http://www.thorlabs.com/ProductDetai...roduct_ID=1481 http://www.optics-online.com/PXP.asp?PN=PXP157 http://www.thorlabs.com/ProductDetai...oduct_ID=36117 http://www.thorlabs.com/ProductDetai...roduct_ID=1483 http://www.bhphotovideo.com/bnh/cont...arch&Q=&ci=300 |
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