Close up and relay lenses at DVinfo.net

Radek Svoboda · March 27th, 2005, 07:46 AM

Where you buy this lenses for HD cameras? Do you have some inexpensive source? Century Optics lenses are too expensive.

I have Sony FX1E camera. I need high quality CU lens but want to save money.

How far must be adapter from the camera lens? Is there ideal distance?

Radek Svoboda · March 29th, 2005, 11:31 AM

http://www.optosigma.com/miva/merchant.mv?Screen=PROD&Store_Code=OS&Product_Code=pg49-52&Category_Code=Achromatic+Doublets

These achromats appear cheaper than Century Optics. 100-120 USD for 51 mm lens. They say they have larger sizes too. These may good for FX1. Did anyone check the price on 72 mm lens? Is 72 mm needed?

How you determine what diopter they are? There is some formula.

Also could you use these as condenser lens?

Where you get metal frame that goes around it?

Radek Svoboda · March 29th, 2005, 04:24 PM

I found out how figure out diopter of lens. Just devide 1000 by focal length (in mm) of lens.

That means Opto Sigma achromats rated from 1 to 12 diopters.

March 27th, 2005, 07:46 AM	#1
Radek Svoboda Major Player Join Date: Mar 2005 Location: Prague, Czech Republic Posts: 500	Close up and relay lenses Where you buy this lenses for HD cameras? Do you have some inexpensive source? Century Optics lenses are too expensive. I have Sony FX1E camera. I need high quality CU lens but want to save money. How far must be adapter from the camera lens? Is there ideal distance?

March 29th, 2005, 11:31 AM	#2
Radek Svoboda Major Player Join Date: Mar 2005 Location: Prague, Czech Republic Posts: 500	http://www.optosigma.com/miva/merchant.mv?Screen=PROD&Store_Code=OS&Product_Code=pg49-52&Category_Code=Achromatic+Doublets These achromats appear cheaper than Century Optics. 100-120 USD for 51 mm lens. They say they have larger sizes too. These may good for FX1. Did anyone check the price on 72 mm lens? Is 72 mm needed? How you determine what diopter they are? There is some formula. Also could you use these as condenser lens? Where you get metal frame that goes around it?

March 29th, 2005, 04:24 PM	#3
Radek Svoboda Major Player Join Date: Mar 2005 Location: Prague, Czech Republic Posts: 500	I found out how figure out diopter of lens. Just devide 1000 by focal length (in mm) of lens. That means Opto Sigma achromats rated from 1 to 12 diopters.