Hitech
and Optiflex are both made
from the same dyed-through Optical Resin substrate. The only difference
is their thickness: Hitech is a rigid filter 1.5mm in thickness, while
Optiflex is a flexible filter being only 0.3mm in thickness. Because of
this difference, graduated and special effects filters are not available
in the Optiflex line.
The Twilight Filter fades from a warm magenta blue
into a more pure magenta then clear. The Sunset Filter, one of the most
popular, moves from an orange-red into a yellow and then clear. The Autumn
Filter fades from a chocolate burgundy into a soft yellow and then clear.
A sample chart does not exist at this time, but it is under development.
Watch this site for its debut!!
This depends largely on your chosen format and
focal length. Most 35mm (and some medium-format) shooters prefer the smaller
size of the 85mm Cokin-P compatible filters. Medium and large format work
is best suited for 100mm (4x4) filters. The HT1002 holder has 3-slots
and a front ring and is an excellent holder for general all-around use.
If you use long zoom or wide angle lenses, we suggest looking at the HT1004.
This holder has 2 slots, but no ring. When used in conjunction with a
wide-angle adapter, this holder will bring your filters extremely close
to the front element of your lens, thereby eliminating the possibility
of vignetting. If you are worried about vignetting, but need to use a
front ring, we suggest looking at the HT1005, which has a front ring,
but only one filter slot. It is also possible to use a standard holder
with a wide-angle adapter, and often (depending on the lens and film-format)
this combination is enough to avoid vignetting.
Hitech and Optiflex clean nicely with either a lens
cleaning cloth, or a filter and lens cleaning solution.
Technically, yes, the 4x4 Optiflex filters will
fit into the 100mm Hitech holder, however, because of the difference in
thickness, there is the possibility that the Optiflex filter could slip
out of the holder, or may not be held perfectly flat. That being said,
there are many photographers who will place 4x4 Optiflex into a Hitech
100mm Holder, if they are conducting tests, trying different filtration,
or are just in a bind!
You can request a swatchbook for both the Roscolux
and Cinegel lines, which contain samples of every gel available. Most
large dealers will have swatchbooks. You can also contact
us, and we'll be happy to send you one. The swatchbook measures approximately
3 x 1.5 inches. If you find that you need something bigger, you can request
either a Roscolux Designer Color Selector, which is 3 x 5 inches ($12.95),
or a Roscolux Professional Reference Edition which is 8 x 10 inches, and
costs $75.00.
Calcolor stands for Calibrated Color, and that means
that each sheet is a very exact, very specific density. These gels operate
in the same fashion as CC filters would work on a camera, however, Calcolor
allows you to adjust the color of a specific light within a shot, rather
than adjusting the entire scene. Consider that you have a scene ready
to shot, lit with multiple light sources. You notice that one light needs
about 30cc of Blue, but the rest of the scene is balanced perfectly. In
this scenario, you can use a CalColor sheet of 30 Blue over that light,
and get exactly what you need. This eliminates the guessing and unpredictability
that often accompanies combining multiple sheets of Roscolux. Contact
us for a Calcolor swatch book and information sheet.
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