Re: [APML] Focusing screens for Nikon F2

[Jerry Lodriguss <jml@astropix.com>]

At 02:26 PM 6/16/2002 -0400, you wrote:
>  I am a beginner in Astrophotography. I bought a Nikon F2 a year ago. It 
> had a focusing screen with a large circle & grid on it & I thought it was 
> a Beattie screen. I used it for the last year, thinking I had the 
> brightest focusing screen - the Beattie. I just removed it & see that it 
> is really the Nikon E focusing screen. (I'm dumb now, but was even dumber 
> last year!)  My question is - is the Beattie screen brighter than the E? 
> Are the Nikon C & D screens brighter than the E?

Hi Lydia,

If the E screen you have is the original E screen made for the F2, then the 
Beattie screen will be brighter.

The new C and D screens for the F 3 are brighter than the old E screen too, 
but don't fit the F2.  Some people have swapped the glass from the new 
screen into the frame of the old screen to make it fit the F2.  I 
personally haven't done it, I would definitely be extra careful to check 
the accuracy of the focus if you do that.

The Nikon D screen is just as bright as the Beattie and much less 
expensive, but as Robert has noted, it works best on long lenses.

More info on screens at:

http://www.astropix.com/HTML/I_ASTROP/SCREENS.HTM


Jerry





Jerry



Astronomical photography: http://www.astropix.com



--  APML Archives at <http://astro.umsystem.edu/apml/>  ---
             Unsubscribe at <majordomo@seds.org>