walimex 330 5,6 Tele Lens T2 User manual

1
Copy of Instruction Manual
330/5,6 Tele Lens T2
Gewerbering 26
86666 Burgheim
Tel. +49 84 32 / 9489-0
Fax. +49 84 32 / 9489 - 8333
eMail: [email protected]
www.foto-walser.de

2
Content
0. ...........................................................................................................................................Introduction 3
1. ................................................................................................................................Mounting your lens 3
2. ....................................................................................................................................Focusing the lens 3
3. .........................................................................................Using the viewfinder with telephoto lenses 3
4. .........................................................................................................................................Depth of field 4
5. .............................................................................................................Cleaning and meintenance tips 4
6...............................................................................................................................Technical data 4
7...................................................................................................................................... Shipment 4

3
Your new catadioptric lens or Reflex Mirror lens is a highly developed computer designed product, using
the merits of both reflex optics and refraction optics. This gives you very sharp picture quality with less
color aberration, which is considered the most harmful factor in the field of telephoto photography.
Each lens comes with interchangeable rear insert filters. Optional filters are exclusively designed for the
Reflex Mirror lenses. The proper T mount adapter is threaded onto the back of the fens.
1. Mounting your lens
Your Lens utilizes a universal mounting ring (T2) which allows your lens to fit practically
all SLR cameras manufactured since 1960. Simply attach the specific T2 adapter for your
style camera to the actual lens and then mount to your camera body in the same way as
your existing lens, which your camera is equipped. Also remove your lens the same way
as your exiting lens and consult your camera introduction manual for further details.
After mounting your T2 adapter to the lens, you may have to adjust the T-mounts so that
the top of the lens faces upward. If this is necessary, loosen the 3 small screws located
on the T-mounts and turn the lens until it is in the proper usable position. Make sure to
retighten the 3 screws after you make the adjustments.
2. Focusing the lens
Focusing is accomplished while viewing the subject through the view-finder of your camera and
rotating the focusing ring. Since the aperture is preset, you will find under certain light conditions
a shadow appearance on the split-image section of your focusing screen. In this case, simply
focus on the edges of your subject with the outer center of your fresnel prism.
NOTE: In order to compensate focusing when normal focusing position may differ due to extreme
temperature change, the focusing ring has been designed to allow rotation beyond tile fixed
engraved marks of the distance scale, To avoid error, focusing should always be made while
looking through the viewfinder.
NOTE: No adjustment of focusing is necessary when taking infrared photography, as is required
with normal lenses.
3. Using the viewfinder with the telephoto lenses
The effectiveness of different types of focusing screens varies with the focal length and
maximum aperture of the lens. The range finder of microgrid prisms built into the
ground glass do not work as well with longer focal length lenses as they do with the
normal camera iens and most wide-angle lenses, and may blackout partically or fully
"the center focusing spot." When such as a condition exists, focusing is best done on the
ground glass portion of the viewing screen. On some SLR cameras, Iong telephoto lenses
appear to produce a cut-off image in the upper corners or along the entire upper edge of
the view finder. Actually such viewing cut-off is caused by the size of the camera's mirror
which is adequater for the shorter focal length lenses only. The exposed slide or
negative will be unaffecied by this viewing deficiency.

4
4. Depth of field
The area in acceptable sharpness in front of, and behind, the subjest in focus is called tole
Depth of Field. The aperture selected and e distance of the subject, as well as, the focal
length of a lens determines such depth of field.
Because of the longer focal length of your Reflex lens the depth of field is acutely narrow, for
example, with a 500mm f8.0 lens, at a distance of 6 feet, the depth of field is only 1/2 inch
wide. Therefore, it is recommended to first practice focusing with your lens before taking
any serious pictures, especially in close-up photography. lt is suggested that a focus
magnifier be used to help determine the depth of field sharpness under such extreme con-
ditions.
5. Cleaning and maintenance tips
The lens should always be capped when not in use. Like other precision optics, it should never
be simply wiped with tissue since this may abrade the surface with any dust clinging to it or on
the lens.
Any accumulated dust should occasionally be blown off with a syringe or available blower
brush designed for this purpose. To remove fingerprints or smears, shred the edge of a lens
tissue and roll it to make a swab: dampen it with a lens cleaner specially. made for
photographic optics and gently wipe the surface without exercising any pressure. Repeat the
procedure if necessary using a new swab. To clean, start at the center of the lens, using a
circular motion and working to the edge of the lens for best results.
When the lens is not in use, it should be stared in a cool dry place, however, if this is not
possible, a leather case with a silica gel packet will afford the same protection as an aluminum
case with poly foam liner.
6. Technical data
Lens speed
F5.6
Lens group/Lenses
1/2
Image angle
3,8°
Closest focusing distance
10m
Filter diameter
ca. 30,5mm
Front diameter
ca. 67mm
Overall length
ca. 298mm
Weight
ca. 505g
Shipment
1 x lens
1 x lens cap
1 x lens bag