Working DIY adapter

Joel Kreisel · February 11th, 2006, 08:37 PM

How many retaining rings do you need for this? Because the spec sheet of the 2" tube says that one ring comes with it, so then buying two more would actually total 3, which wouldn't be very useful, since you pretty much need them in pairs, right? It was my understanding that inside the tube it would be:

Ring-GG-ring-{16mm space or so}-ring-condenser-ring

Right? So then I would need to order three?

Ben Winter · February 11th, 2006, 09:01 PM

Joel, when I built this adapter, the condenser works absolutely great right up against the ground glass--meaning you only have to buy one extra retaining ring.

On that note, I must add that I have a FL=70mm PCXL (the same used in richard mellor's design) that I got from Optosigma available for sale, in great condition, as well as a retaining ring. If you're interested I'll sell you both a retaining ring and the PCX for $30. Let me know.

Joel Kreisel · February 11th, 2006, 09:17 PM

Thanks for the offer Ben, but I've decided to go with an aspheric PCX for my model and see how that compares to other people's standard PCXs. If you just want to sell the ring, I'd take it off your hands, but I understand if you'd rather sell them together. Email me if you're interested.

Ben Winter · February 11th, 2006, 10:25 PM

Sounds good Joel. By the way, if you really want to, just take apart a 52mm UV filter; you'll find a "retaining ring" in there :)

Jimmy Herdberg · February 12th, 2006, 02:02 PM

You have one ring with the tube and have to buy three extra, two for gg and two for pcx-lens.

February 11th, 2006, 09:01 PM	#62
Ben Winter Trustee Join Date: Jun 2005 Location: Hollywood, CA Posts: 1,675 Images: 1	Joel, when I built this adapter, the condenser works absolutely great right up against the ground glass--meaning you only have to buy one extra retaining ring. On that note, I must add that I have a FL=70mm PCXL (the same used in richard mellor's design) that I got from Optosigma available for sale, in great condition, as well as a retaining ring. If you're interested I'll sell you both a retaining ring and the PCX for $30. Let me know. __________________ BenWinter.com

February 11th, 2006, 10:25 PM	#64
Ben Winter Trustee Join Date: Jun 2005 Location: Hollywood, CA Posts: 1,675 Images: 1	Sounds good Joel. By the way, if you really want to, just take apart a 52mm UV filter; you'll find a "retaining ring" in there :) __________________ BenWinter.com

February 11th, 2006, 08:37 PM	#61
Joel Kreisel Regular Crew Join Date: Jan 2006 Location: Minneapolis, MN, USA Posts: 44	How many retaining rings do you need for this? Because the spec sheet of the 2" tube says that one ring comes with it, so then buying two more would actually total 3, which wouldn't be very useful, since you pretty much need them in pairs, right? It was my understanding that inside the tube it would be: Ring-GG-ring-{16mm space or so}-ring-condenser-ring Right? So then I would need to order three?

February 11th, 2006, 09:17 PM	#63
Joel Kreisel Regular Crew Join Date: Jan 2006 Location: Minneapolis, MN, USA Posts: 44	Thanks for the offer Ben, but I've decided to go with an aspheric PCX for my model and see how that compares to other people's standard PCXs. If you just want to sell the ring, I'd take it off your hands, but I understand if you'd rather sell them together. Email me if you're interested.

February 12th, 2006, 02:02 PM	#65
Jimmy Herdberg New Boot Join Date: Oct 2005 Posts: 22	You have one ring with the tube and have to buy three extra, two for gg and two for pcx-lens.