14
Manual: Cool-Ceramic Safety Herschel Prism Mark II
Attaching a camera
Cameras with a long flange focal length, such as digital
SLR cameras with a 55 mm flange focal length, do
not usually come into focus, as most refractors are
designed to use these cameras without an additional
star diagonal. In this case, you have to remove the 2"
ClickLock
®
and replace it with the Diamond Steeltrack
®
T-2 adapter
# 2957202
with an optical length of 2 mm.
To do this, proceed as described in the chapter "Shor-
tening the overall length".
Astronomical cameras with a 1¼" or 2" nose piece
can usually be used behind the Herschel prism without any problems.
Cameras with a T-2 thread can be used directly on the Herschel prism with the
Baader 2" / T-2 (M48) nosepiece with Safety Kerfs
# 2458130
. Alternatively, as when
using a DSLR, you can remove the 2" ClickLock
®
and screw the camera directly to
the Herschel prism via the Diamond Steeltrack
®
T-2 adapter
# 2957202
, optical length
2 mm, or via an optional T-2 quick release.
The FFC Fluorite Projection Lens System on the CCS Herschel Prism Mark II.
Attention: Use FFC only with great care!
There is a risk of damage to the FFC and loss of warranty.
Probably the world's best projection lens for planetary projection photography is our
Fluorite Flatfield Corrector (FFC), which allows a focal
length extension of 3x to 8x.
Together with the Cool-Ceramic Herschel prism,
this enables amazingly high-resolution images of the
solar surface.
However, utmost care is required to avoid overhe-
ating the sensitive FFC lenses made of real fluorite
crystal (no ED glass!). A crack in a fluorite lens due to
excessive heat exposure can be detected by expert
examination and a warranty claim is excluded. Repair
or replacement of fluorite lenses is very expensive.
Firstly, in order to reliably prevent overheating,
at least an ND 3.0 filter or (with a greatly reduced
exposure time) an attenuating glass 1.8 or 0.9 must
always be mounted in the housing of the Herschel
prism (in front of the FFC).
For all types of solar projection photography, it is
tempting to simply remove all the ND filters from the
CCS Herschel prism in order to literally "freeze" the
turbulence in the Earth's atmosphere with the help of
the resulting extremely short exposure times around
3 ms.
Possible configuration for the FFC
Camera with T-
2-thread
Optional:TQC/TCR Heavy
duty T-2 Quick Changing
System
# 2456322
Optional:TQC/TCR Heavy
duty T-2 Quick Changing
System
# 2456322
3x T-2 Extension 40mm
# 1508153
FFC
# 2458200
