DCX lens

Leo Mandy · February 3rd, 2005, 03:46 PM

I was just at this url
http://www.paddlefilms.com/agus35.htm

and noticed that he/she refers to the DCX lens. Is this the macro lens?
Also, I did a search and found that I can get around 50 for 3-4 buck! But I wonder if it needs to be high grade? Maybe the $3-4 are just cheap plastic? Not really sure. I have tried emailing the creator of the site, but haven't heard anything - I always try to do my DD first!

Anyone else have luck something like a DCX lens?

Thanks

Rob Lohman · February 4th, 2005, 04:20 AM

It looks like a lens to even out a hotspot in the image, or it could
be used as a ground glass I think...

Aaron Shaw · February 4th, 2005, 11:34 AM

A DCX, or double convex lens (or concave) can be used for many applications. It converges all light parallel to it's principle axis (meaning the lens is symetrical about it's horizontal axis). It could be used as a condenser or could be integrated as an actual imaging lens.

Leo Mandy · February 4th, 2005, 03:52 PM

What does the condenser lens actually do?

Aaron Shaw · February 4th, 2005, 04:38 PM

Condenses the image size which yields a brighter image per square area. It helps eleminate hot spots and pull in extra light that would otherwise end up in useless places.

Leo Mandy · February 4th, 2005, 07:03 PM

Ok, so a macro is still need, it just deals with the hotspot and other problems. Thanks!

Aaron Shaw · February 4th, 2005, 07:17 PM

It is feasible that the DCX is being used as a macro. It certainly could be. All a macro does is shorten the focal length of the lens to allow closer focusing. These are normally some form of meniscus lens but you could possibly have one made as a DCX. In any case, you will need something that acts as a macro. Macro lens, custom lens etc.

February 3rd, 2005, 03:46 PM	#1
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	DCX lens - what does it do? I was just at this url http://www.paddlefilms.com/agus35.htm and noticed that he/she refers to the DCX lens. Is this the macro lens? Also, I did a search and found that I can get around 50 for 3-4 buck! But I wonder if it needs to be high grade? Maybe the $3-4 are just cheap plastic? Not really sure. I have tried emailing the creator of the site, but haven't heard anything - I always try to do my DD first! Anyone else have luck something like a DCX lens? Thanks

February 4th, 2005, 04:20 AM	#2
Rob Lohman RED Code Chef Join Date: Oct 2001 Location: Holland Posts: 12,514	It looks like a lens to even out a hotspot in the image, or it could be used as a ground glass I think... __________________ 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

February 4th, 2005, 11:34 AM	#3
Aaron Shaw Major Player Join Date: Jul 2004 Posts: 587	A DCX, or double convex lens (or concave) can be used for many applications. It converges all light parallel to it's principle axis (meaning the lens is symetrical about it's horizontal axis). It could be used as a condenser or could be integrated as an actual imaging lens.

February 4th, 2005, 03:52 PM	#4
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	What does the condenser lens actually do?

February 4th, 2005, 04:38 PM	#5
Aaron Shaw Major Player Join Date: Jul 2004 Posts: 587	Condenses the image size which yields a brighter image per square area. It helps eleminate hot spots and pull in extra light that would otherwise end up in useless places.

February 4th, 2005, 07:03 PM	#6
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	Ok, so a macro is still need, it just deals with the hotspot and other problems. Thanks!

February 4th, 2005, 07:17 PM	#7
Aaron Shaw Major Player Join Date: Jul 2004 Posts: 587	It is feasible that the DCX is being used as a macro. It certainly could be. All a macro does is shorten the focal length of the lens to allow closer focusing. These are normally some form of meniscus lens but you could possibly have one made as a DCX. In any case, you will need something that acts as a macro. Macro lens, custom lens etc.