[M]: RE: RE: (focussing screens)
| Subject: | [M]: RE: RE: (focussing screens) |
| From: | Heapy Chris CG |
| Date: | Tue Mar 23 00:53:06 1999 |
This is not really a great idea - unless you also include a reference grid
for your eye to focus on. A clear screen means you have to rely on viewing
the virtual image and your eye will compensate if its a bit out-of-focus,
achieving accurate focus is therefore made difficult. You can make a
standard screen much brighter by rubbing a tiny amount of
grease/oil/wax-polish/WD40 or whatever on the matt side, at least this is
reversible! Also, there is little difference between a clear screen and no
screen - just temporarily remove it if you want to try the clear option.
At one time I had made a clear screen for my OM1 from a piece of microscope
slide with fine lines etched on it, this was very bright indeed but
singularly useless for focussing (difficult even with the reference lines).
Chris Heapy
> ----------
> From: Heath, Andrew[SMTP:ah40096@glaxowellcome.co.uk]
> Sent: 23 March 1999 07:53
> To: mapug@shore.net
> Subject: [M]: RE:
> Importance: High
>
> Clive,
>
> I have a Nikon FA and recently posted the focusing screen up to a chap in
> Cumbria who polished the matt part of it down until it was clear, he also
> polished down the rangefinder segment in the middle until it was clear
> too!!
> If you require further details let me know, by the way it only cost me
for your eye to focus on. A clear screen means you have to rely on viewing
the virtual image and your eye will compensate if its a bit out-of-focus,
achieving accurate focus is therefore made difficult. You can make a
standard screen much brighter by rubbing a tiny amount of
grease/oil/wax-polish/WD40 or whatever on the matt side, at least this is
reversible! Also, there is little difference between a clear screen and no
screen - just temporarily remove it if you want to try the clear option.
At one time I had made a clear screen for my OM1 from a piece of microscope
slide with fine lines etched on it, this was very bright indeed but
singularly useless for focussing (difficult even with the reference lines).
Chris Heapy
> ----------
> From: Heath, Andrew[SMTP:ah40096@glaxowellcome.co.uk]
> Sent: 23 March 1999 07:53
> To: mapug@shore.net
> Subject: [M]: RE:
> Importance: High
>
> Clive,
>
> I have a Nikon FA and recently posted the focusing screen up to a chap in
> Cumbria who polished the matt part of it down until it was clear, he also
> polished down the rangefinder segment in the middle until it was clear
> too!!
> If you require further details let me know, by the way it only cost me
