What am I doing wrong?

Matt Champagne · July 16th, 2005, 01:51 PM

I can see from Oscars pictures that I should be able to get a good result, and from his other pictures my wax is WAY to thick. I'll try and remove some wax, and if I get some good results I post a picture of my adaptor for you...make sure to post if that PCX lens changes things.

Riley Stearns · July 18th, 2005, 10:42 AM

Well yesterday I got a hold of a pcx type condensor lens, which is flat on one side and concave(?) on the other, and it completely solve my light distribution problems and even makes it possible to shoot indoors. The only problem is the lens is by itself and doesn't have any threads or means of setting it in to place. Here's the site where my source of the lens bought it at.

http://www.anchoroptics.com/catalog/...d=16&start=426

It's larger than the 55mm lens system I have now, but not by much. If I could get a threaded 55mm version of this lens I would solve my adapter problem.

Riley Stearns · July 18th, 2005, 10:46 AM

Actually I just found which lens is the one I have. It's http://www.anchoroptics.com/catalog/...d=16&iid=21287 and even though it says 54mm dia. or something like that it still is a little too big.

Riley Stearns · August 1st, 2005, 10:00 PM

https://webspace.utexas.edu/rjs539/www/DOFIndoor.mov

Here's a video of my most recent test. I had to shoot it in my apartment since it was raining here a good chunk of the day, so it's not as good as if it was better lit. I got a condensor which evenly spreads the light on my gg. The only problem is over the past several months, my ground glass has aquired an insignificant chip which is anything but insignificant on screen. Crap! I guess this might be a good excuse to try out a manufactured gg instead. It'd definitely have better light distribution than what I have now. I would try the wax, but I've heard it has a tendency to melt in hot climates.
Just a reminder, this is a Canon Optura XI with a Konica F1.4. Hopefully I can inprove on my design as time goes on.

Leo Mandy · August 2nd, 2005, 10:44 AM

Hey Riley,

Looking at your adapter, you have a close up lens right next to the 57mm Konica (same one I have). And you have another one farther down, how come?

Riley Stearns · August 2nd, 2005, 07:00 PM

The one that's closer to the lens is an empty spacer, but the one next to the ground glass acts as a weak condensor and at the same time reduces the length of the adapter slightly.

I took it outside today and didn't see any vingetting in 16x9 mode. I'm really excited and as soon as I can come across a better and more professional ground glass I'll be in business. I don't work tomorrow so I'll post a better video clip and a pic of the setup.

Leo Mandy · August 2nd, 2005, 08:49 PM

Looks good Riley, keep us posted with some pics!

July 18th, 2005, 10:42 AM	#17
Riley Stearns Regular Crew Join Date: Jan 2005 Location: Austin, TX Posts: 94	Well yesterday I got a hold of a pcx type condensor lens, which is flat on one side and concave(?) on the other, and it completely solve my light distribution problems and even makes it possible to shoot indoors. The only problem is the lens is by itself and doesn't have any threads or means of setting it in to place. Here's the site where my source of the lens bought it at. http://www.anchoroptics.com/catalog/...d=16&start=426 It's larger than the 55mm lens system I have now, but not by much. If I could get a threaded 55mm version of this lens I would solve my adapter problem. __________________ i can't yet see Productions

July 18th, 2005, 10:46 AM	#18
Riley Stearns Regular Crew Join Date: Jan 2005 Location: Austin, TX Posts: 94	Actually I just found which lens is the one I have. It's http://www.anchoroptics.com/catalog/...d=16&iid=21287 and even though it says 54mm dia. or something like that it still is a little too big. __________________ i can't yet see Productions

August 1st, 2005, 10:00 PM	#19
Riley Stearns Regular Crew Join Date: Jan 2005 Location: Austin, TX Posts: 94	Success... Sort of. https://webspace.utexas.edu/rjs539/www/DOFIndoor.mov Here's a video of my most recent test. I had to shoot it in my apartment since it was raining here a good chunk of the day, so it's not as good as if it was better lit. I got a condensor which evenly spreads the light on my gg. The only problem is over the past several months, my ground glass has aquired an insignificant chip which is anything but insignificant on screen. Crap! I guess this might be a good excuse to try out a manufactured gg instead. It'd definitely have better light distribution than what I have now. I would try the wax, but I've heard it has a tendency to melt in hot climates. Just a reminder, this is a Canon Optura XI with a Konica F1.4. Hopefully I can inprove on my design as time goes on. __________________ i can't yet see Productions

August 2nd, 2005, 07:00 PM	#21
Riley Stearns Regular Crew Join Date: Jan 2005 Location: Austin, TX Posts: 94	The one that's closer to the lens is an empty spacer, but the one next to the ground glass acts as a weak condensor and at the same time reduces the length of the adapter slightly. I took it outside today and didn't see any vingetting in 16x9 mode. I'm really excited and as soon as I can come across a better and more professional ground glass I'll be in business. I don't work tomorrow so I'll post a better video clip and a pic of the setup. __________________ i can't yet see Productions

July 16th, 2005, 01:51 PM	#16
Matt Champagne Major Player Join Date: Nov 2004 Location: New Iberia, LA Posts: 229	I can see from Oscars pictures that I should be able to get a good result, and from his other pictures my wax is WAY to thick. I'll try and remove some wax, and if I get some good results I post a picture of my adaptor for you...make sure to post if that PCX lens changes things.

August 2nd, 2005, 10:44 AM	#20
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	Hey Riley, Looking at your adapter, you have a close up lens right next to the 57mm Konica (same one I have). And you have another one farther down, how come?

August 2nd, 2005, 08:49 PM	#22
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	Looks good Riley, keep us posted with some pics!