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  #1  
Old 9th August 2011, 12:15 PM
DaveP DaveP is offline
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Default 37mm Push-On filter adapter - cheap & strong solution?

Hi all

I've got a 203mm kodak ektar that I'm using for 4x5. Its the British made "Mount 370" type that has no filter thread but supposedly takes a 37mm push on filter.

Now the problem I have to overcome is that I need to be able to use this with normal screw-in filters, ideally stepped up to a Lee system ring so its the same as all my other lenses. At the moment I've got a Lee ring on a step up ring down to about 40.5mm if I remember correctly, and this has an interior diameter of about 39mm and is just sat round the front portion of the lens and held in place with blutack. Ugly but it works, except not very confidence inspiring when you're hanging a Lee holder and a 105mm polariser from the front of it, and the blutack is softening in the summer heat....

So to get a better solution, it seems I could try and get hold of any old 37mm push-on filter from ebay, take the glass out and glue it onto a step-up ring. But I'm not sure how strong this would be - some of the push-on filters on ebay do look a bit flimsy.

Similarly I could try one of the more stubstantial 37mm push-on hoods on ebay and just saw off all the hood section. They look like you'd get a stronger connection but they're not cheap.

Another more drastic option is to find an appropriately sized step-up ring or empty filter thread and just glue it onto the front of the lens permanently. My lens isn't cosmetically perfect so I might just go down this route.

So before I reach for the epoxy and dremel, does anyone have any better ideas? Please don't say "just get a Nikkor 200mm M".
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Old 9th August 2011, 12:31 PM
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Jon Butler Jon Butler is offline
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I've in the past used tha universal filter adaptor BluTac, many pro's aways keep some in their bag.
J.
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Old 9th August 2011, 02:31 PM
Alan Clark Alan Clark is offline
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Dave,
You might try getting hold of a piece of good quality plywood about 6mm thick - or M.D.F. Cut it into a disc of appropriate diameter, araldite a stepping ring to it, and cut a 37mm diameter hole in it so it pushes onto your lens. As I have the tools to do this easily and also have a 203mm Kodak Ektar lens to try it on, I could do this for you if you get stuck. But I would need to know the overall diameter of the stepping ring.
I have a Kodak filter holder and lens hood with my Ektar, along with yellow, green and red filters. (No orange unfortunately) These filters are mounted in a metal ring (no thread) of about 42mm dia. You push the filter holder onto the lens, pop a filter in it, and screw the lens hood to the internal thread of the filter holder. The hood holds the filter in place. Very neat!

Alan
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Old 9th August 2011, 02:43 PM
DaveP DaveP is offline
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Thanks for the offer Alan, very kind. I did think of doing soemthing similar myself, but I'd have to make sure the fit was tight enough to keep everything secure.

Your filter holder sounds intriguing - is that one of the fabled Series VI(?) holders?

One thing to bear in mind is I understand the front portion of the US-made Ektars and the British ones are different diameters. Does yours say "MOUNT 370" on the front Alan?
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Old 9th August 2011, 03:10 PM
Neil Smith Neil Smith is offline
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I can support the blu-tac approach I have used this in the past when I didn't have the correct filter size.

Neil
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Old 9th August 2011, 03:23 PM
DaveP DaveP is offline
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Don't get me wrong, I'm all about the blutac usually, but a lee holder with say a couple of grads and a polariser not only weighs a fair bit but if broken would cost a lot of cheddar to replace. Would be good to get a more concrete setup.
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Old 9th August 2011, 04:22 PM
Alan Clark Alan Clark is offline
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Dave, not sure about the "fabled Series V1" but the lens says MOUNT 370 on the front. And the filter holder and hood both say KODAK 370 MADE IN ENGLAND ON THEM.
I got the lens with a Kodak half plate Specialist camera. It's a nice outfit, with original Kodak film holders, carrying case and instruction book. The camera is a pleasure to use, with mostly geared movements. Great for landscape photography; but only if you can arrange for a Pickfords low loader to follow you around!

Alan
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Old 9th August 2011, 04:50 PM
Richard Gould Richard Gould is offline
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Quote:
Originally Posted by Jon Butler View Post
I've in the past used tha universal filter adaptor BluTac, many pro's aways keep some in their bag.
J.
I use blu tac for all of my filters, works a treat and saves the expense of buying different filters for all of my growing collection of classic cameras, the only cameras I do not use blu tac are my 2 rolleis as both my cord and flex take the B1 and I was lucky enough to get some rollei filters and a hood for them.
Richard
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Old 10th August 2011, 06:56 AM
Dave miller Dave miller is offline
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Quote:
Originally Posted by DaveP View Post
Don't get me wrong, I'm all about the blutac usually, but a lee holder with say a couple of grads and a polariser not only weighs a fair bit but if broken would cost a lot of cheddar to replace. Would be good to get a more concrete setup.
Keep them away from concrete.
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  #10  
Old 12th August 2011, 01:26 PM
DaveP DaveP is offline
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Well having failed to think of any better ideas I'm going to give Alan's wood suggestion a try. Might try to lay my hands on a 35 or 36mm flat wood drill bit, a sheet of sandpaper and take it from there.
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