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Related Manuals for Irix 11 mm f/4.0
Summary of Contents for Irix 11 mm f/4.0
- Page 1 Extended User Manual Irix 11 mm f/4.0...
- Page 2 Extended User Manual – Irix 11 mm f/4.0 Thank you for choosing an Irix lens. You hold in your hand the fruit of the dedication and experien- ce of the combined forces of engineers and photo- graphers. Using the finest available materials, state-of-the-...
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Page 3: Table Of Contents
Extended User Manual – Irix 11 mm f/4.0 TABLE OF CONTENTS FRONT LENS CAP FOCUS SCALE CALIBRATION FOCUS LOCK RING FOCUS RING DEPTH OF FIELD SCALE HYPERFOCAL SCALE REAR GELATIN FILTER SLOT HOW TO ATTACH THE LENS TO THE CAMERA... -
Page 4: Front Lens Cap
Extended User Manual – Irix 11 mm f/4.0 FRONT LENS CAP The front lens cap protects the front lens element from possible contamination and impact damage. The cap should always be attached when the lens is not in use. To attach or remove the front cap, hold the lens... -
Page 5: Focus Scale Calibration
Extended User Manual – Irix 11 mm f/4.0 FOCUS SCALE CALIBRATION You Irix lens has been engineered to exacting stan- dards. The focus scale is factory calibrated and should be accurate. In some cases, however, you may find that the infinity mark on your lens does not correspond to the optimum focus setting for distant objects. -
Page 6: Focus Lock Ring
Extended User Manual – Irix 11 mm f/4.0 FOCUS LOCK RING The focus lock ring allows you to fix the focusing ring in a selected position. This innovative feature helps prevent accidental movement, resulting in focus shift. You may want to use the focus lock during long exposures, time-lapse imaging, or whenever re- petitive shots are called for. -
Page 7: Focus Ring
Your Irix lens allows you to set the focus at infinity without the need to look at the scale. While rotating the focus ring, infinity is indicated by a click and a definitive stop in the rotation. - Page 8 Extended User Manual – Irix 11 mm f/4.0 DEPTH OF FIELD SCALE The depth of field scale provides a visual reference for the range of maximum sharpness in your pho- tos at a given aperture and focus setting. It allows you to determine the plane of focus, within which objects in your image will be at their sharpest.
- Page 9 Extended User Manual – Irix 11 mm f/4.0 DEPTH OF FIELD SCALE EXAMPLE NO 1 In this example, the lens is focused on the seventh key from the font of the image. The lens aperture is at its maximum setting of 4.0 You can see in the image that only the neighboring keys are in sharp focus at this aperture setting.
- Page 10 Extended User Manual – Irix 11 mm f/4.0 DEPTH OF FIELD SCALE EXAMPLE NO 2 In this image, the focus setting remains the same as the first example, while the aperture setting is changed to f/8. Consulting the DoF scale, we can now use the two numerals “8”...
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Page 11: Depth Of Field Scale
Extended User Manual – Irix 11 mm f/4.0 DEPTH OF FIELD SCALE EXAMPLE NO 3 Next, the aperture setting is decreased to f/16, without changing the focus setting. This smaller aperture will increase the DoF. You can see the increased plane of focus in the image. -
Page 12: Hyperfocal Scale
Extended User Manual – Irix 11 mm f/4.0 HYPERFOCAL SCALE In landscape, travel and similar types of photo- graphy, it’s often beneficial to maximize the depth of field in your images. This is best accomplished by setting your focus at the closest point of sharp focus for the chosen aperture setting. - Page 13 Extended User Manual – Irix 11 mm f/4.0 HYPERFOCAL SCALE Your Irix lens includes an innovative feature that allows you to quickly focus your lens at the hyper- focal distance for apertures of f/4 to f/16. The hy- perfocal scale is located above the distance scale on the lens barrel.
- Page 14 Extended User Manual – Irix 11 mm f/4.0 HYPERFOCAL SCALE The hyperfocal scale consists of four positions: 4, 8, 11 and 16. When working with the hyperfocal scale, the focus ring sets itself in aforementioned position and you should set this aperture number in your camera.
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Page 15: Rear Gelatin Filter Slot
Extended User Manual – Irix 11 mm f/4.0 REAR GELATIN FILTER SLOT Your Irix lens is equipped with a 30mm x 30mm slot behind the rear element to accommodate ge- latin filters. A template for pre-cutting filters is inc- luded on the last page of this document. -
Page 16: How To Attach The Lens To The Camera
Extended User Manual – Irix 11 mm f/4.0 HOW TO ATTACH THE LENS TO THE CAMERA Exact mounting methods vary from camera to camera. Consult the user’s manual for your came- ra for instructions on mounting your Irix lens. The dot on the case bevel closest to the camera indica- tes the alignment mark for mounting. -
Page 17: Rear Lens Cap
It should be attached immediately when the lens is removed. Your Irix lens comes with a spare rear cap, which you can find inside the lens box. Additional lens caps can be purchased from www.irixlens.com if needed. -
Page 18: Aperture Control
Extended User Manual – Irix 11 mm f/4.0 APERTURE CONTROL Your Irix lens is equipped to function with your camera’s electronic aperture controls. It also com- municates the aperture information to the came- ra’s software for display and EXIF data. -
Page 19: Hard Lens Case
Extended User Manual – Irix 11 mm f/4.0 HARD LENS CASE To protect your lens against damage from the environment, always store it in the included hard case (Blackstone version) or soft lens pouch (Firefly version). While the case helps protect your lens, it is NOT waterproof and... -
Page 20: Maintenance
Extended User Manual – Irix 11 mm f/4.0 MAINTENANCE All Irix lens elements are coated with an- ti-reflective compounds, which also crease their resistance contamination. Periodic cleaning should consist of dust removal with a bulb-type air blower or soft brush*, follo-... -
Page 21: Safety Precautions
Extended User Manual – Irix 11 mm f/4.0 SAFETY PRECAUTIONS Your Irix lens is equipped with seals to prevent the infiltration of dust, moisture and water splashes. This sealing does not make your lens completely waterproof. Do not allow your lens to be- come submerged, come into contact with liquids under pressu- re,or be stored in humid locations. -
Page 22: Technical Specification
Extended User Manual – Irix 11 mm f/4.0 TECHNICAL SPECIFICATION Focal Length 11 mm Maximum aperture value f/4.0 Minimum aperture value f/22 Number of aperture blades Image size 36 x 24 mm Angle of view 126° Minimal focusing distance 27,5 cm (0.91 ft) -
Page 23: Template For Cutting Gelatin Filters
Extended User Manual – Irix 11 mm f/4.0 TEMPLATE FOR CUTTING GELATINE FILTERS 29.00 4.00 Irix gelatin filter... - Page 24 VER. 1.1 www.irixlens.com info@irixlens.com...
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