Filter holder

[bdoss2006]

I have an omega c-700 enlarger that I bought on eBay. It came with a set of ilford multigrade filters and a filter holder, but I don’t see a way to attach the filter holder to it. Here are some pictures of the filters and the holder and the bottom of the enlarger. It also came with a red filter to go on it. What exactly does it do?

 

[gordrob]

An explanation of your problem is found here. Hope this helps

Under-lens Filter Holder for Omega C760 Enlargers

store.khbphotografix.com

 

[bdoss2006]

An explanation of your problem is found here. Hope this helps

Under-lens Filter Holder for Omega C760 Enlargers

store.khbphotografix.com

That’s sorta what I was thinking, that I needed a different one. Wonder why it came with the one it did?

 

[Bill Burk]

The Kodak holder would look like this if you had the three screws. Shouldn’t be hard to replace with similar screws from any hardware store.

 

[bdoss2006]

The Kodak holder would look like this if you had the three screws. Shouldn’t be hard to replace with similar screws from any hardware store.

I’ve got the three screws. I just don’t know what to do with them.

 

[bdoss2006]

The Kodak holder would look like this if you had the three screws. Shouldn’t be hard to replace with similar screws from any hardware store.

I know you put them in that but the. Where does it mount?

 

[BMbikerider]

The three screws, if they are in the same Ilford holder as I have, they actually clamp the holder onto the bottom ring of the enlarging lens. This makes the operation of the aperture ring of the lens a little awkward, so I bought 2 x 2nd hand 40.5mm filters which were damaged and removed the glass. I mounted them in tandem and screwed them into the threaded front of the enlarging lens. (Rodagon Apo 50mm F2.8) this made access easier and the filters work perfectly.

There was another type of filter holder that was shaped like a cage and this was designed to fit onto the base of the lens around the mounting thread. This sometimes made the mounting of the lens quite difficult because the thread portion was not deep enough to fit the lens securely.

 

[Ian C]

Depending on the design of the holder, the three screws are held to their mounting posts with a nut. On my current version or the Ilford MG filter holder the nut is first placed into the slot of the posts and then the screw is fed through from the outside. I think the holder shown has these these three screw & nut holding posts.

The dimensions of the post lugs prevent the nut from turning. Once the screw engages the nut, the nut is held captive between the posts. Then, rubber contact pads are installed onto the ends of the screws. These rubber contact pads serve two purposes:

1. They prevent marring of the outside of the lens barrel.

2. The rubber has significant friction with the lens barrel, giving a good grip with a moderate amount of pressure.

Since the holder and filter have so little weight, it doesn’t take much tightening of the three setscrews to obtain sufficient grip. The screws are snugged with the grip of your thumb and fingers only—don’t use a wrench.

I received a second used set with holder that was missing the rubber pads. I was able to find suitable replacement at my local hardware store. It’s flexible small diameter black rubber tubing sold as replacement automobile windshield washer tubing that carries washer solution from the reservoir to the spray nozzles. It’s also used to conduct water from the solenoid valve to the evaporator pad on my furnace humidifier. It’s a common product and readily available. It comes on a spool and is sold by the foot.

Cut three pieces with a razor or sharp knife. A scissors might work as well. Then you have to work the short rubber tubes onto the ends of the screws for a safe, non-marring grip on your lens.

 

[Hilo]

An explanation of your problem is found here. Hope this helps

Under-lens Filter Holder for Omega C760 Enlargers

store.khbphotografix.com

This Omega under the lens filter holder is excellent. Even more when your enlarger accepts it. It is 'open' at the front which makes installing and removing filters very easy. Just search for them on the big E site, save the search and soon you will find one at less than $ 30 . . .

I buy them to use on Leitz Focomat Ic and Valoy II enlargers, as it easy to modify them. Right now I don't need more of these holders . . .

 

[DREW WILEY]

Use nylon screws if you don't want to mar the lens barrel. A friction fit using some rubber weatherstripping could also be done. But if your enlarging lens has filter threads, then simply use the necessary step ring adapter and epoxy it to the gel holder. A flip-away holder, like Hilo just linked, is more convenient, however.