From: "Ellen Mackenzie" 
To: 
Reply-To: "Ellen Mackenzie" 


This is a multi-part message in MIME format.

------=_NextPart_000_003A_01C2F9EC.1B3BB0D0
Content-Type: text/plain;
        charset="iso-8859-1"
Content-Transfer-Encoding: 7bit

In response to Shawn's question about going off axis with a 4 inch F15
mirror, the distortions would be the same as a spherical mirror of about 11
inch aperture with a 60 inch FL or F/5 approximately. You must tilt the 4
inch mirror as if it were a part of a larger mirror with the diagonal
placed on the larger mirror's axis. An interesting note, this was the
design platform for the original Maksutov with the corrector as a sub
diameter portion of the large mirror. Very do-able as long as you mark your
wedge position and have a good mike that reads to 0.0001. The design was
published in either vol.2 or vol.3 of the ATM books.

                                Ellen

------=_NextPart_000_003A_01C2F9EC.1B3BB0D0
Content-Type: text/html;
        charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable








In =
response to=20
Shawn's question about going off axis with a 4 inch F15 mirror, the = distortions=20
would be the same as a spherical mirror of about 11 inch aperture with a = 60 inch=20
FL or F/5 approximately. You must tilt the 4 inch mirror as if it were a = part of=20
a larger mirror with the diagonal placed on the larger mirror's axis. An =

interesting note, this was the design platform for the original Maksutov = with=20
the corrector as a sub diameter portion of the large mirror. Very = do-able as=20
long as you mark your wedge position and have a good mike that reads to = 0.0001.=20
The design was published in either vol.2 or vol.3 of the ATM=20
books.
 
       &nbs=
p;            =
;           =20
Ellen

------=_NextPart_000_003A_01C2F9EC.1B3BB0D0--

--- BBBS/NT v4.00 MP