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Date: 17 Sep 2006 23:28:25
From:
Subject: Mounting 1.25" eyepiece filter on camera lens


I need to mount standard 1.25" eyepiece filters onto a camera lens with
a 52mm accessory thread. Any suggestions?

Brian





 
Date: 18 Sep 2006 15:46:51
From:
Subject: Re: Mounting 1.25" eyepiece filter on camera lens



William Hamblen wrote:
> On 17 Sep 2006 23:28:25 -0700, brianc1959@aol.com wrote:
>
> >I need to mount standard 1.25" eyepiece filters onto a camera lens with
> >a 52mm accessory thread. Any suggestions?
>
> You can get filter step rings from camera stores, but I don't think
> they go as small as a 1.25" filter. If you could get them you would
> experience bad vignetting. You can get almost any color filter and
> some nebula filters in the 52 mm size.
>
> Bud
> --
> The night is just the shadow of the Earth.

I'm trying to mount a Baader "Venus" filter to a 105/4.5 UV-Nikkor. As
far as I know this filter is not yet available in 2" size. Vignetting
won't be a problem so long as I can position the filter reasonably
close to the lens. The entrance pupil in the UV-Nikkor is fairly near
the front element, and the chief ray angle is moderate.

There seem to be lots of adapters and accessories for 28mm thread size,
probably due to the CoolPix cameras. Unfortunately, the 1.25" filter
thread is slightly larger than this.

Brian



 
Date: 18 Sep 2006 12:21:32
From: William Hamblen
Subject: Re: Mounting 1.25" eyepiece filter on camera lens


On 17 Sep 2006 23:28:25 -0700, brianc1959@aol.com wrote:

>I need to mount standard 1.25" eyepiece filters onto a camera lens with
>a 52mm accessory thread. Any suggestions?

You can get filter step rings from camera stores, but I don't think
they go as small as a 1.25" filter. If you could get them you would
experience bad vignetting. You can get almost any color filter and
some nebula filters in the 52 mm size.

Bud
--
The night is just the shadow of the Earth.