OPERATOR’S MANUAL (Please Read This Manual Before Using the Microscope) 490 Series Compound Microscope
490 Series Microscope Copyright © 2015 United Scope Inc. DBA AmScope. All rights reserved. Copyright Notice This document, which is in draft form and subject to change without notice, is an unpublished work containing confidential, trade secret information that is proprietary to AmScope, and is protected by laws pertaining to such materials.
490 Series Microscope Contents BEFORE USE ..................................................................................................................................................................... 4 Introduction................................................................................................................................................................. 4 Precautions .................................................................................................................
90 Series Microscope Before Use Introduction Congratulations on the purchase of your new AmScope Microscope! This manual is designed for 490 series microscopes. Though the microscope’s body and magnification levels may vary depending on your series model number, the 490 series functions remain the same. Please take a few minutes to familiarize yourself with the features and functions of your new microscope.
490 Series Microscope 1.
490 Series Microscope 2. Operation 2.1 Unpacking 2.1.1 Unpack the Box 1. Very carefully slide the Styrofoam container out of the cardboard carton. 2. Lay the Styrofoam container on its side. Make sure the side labeled up is up. 3. Remove the tape. 4. Carefully open the Styrofoam container, avoid dropping and damaging the optical items. 2.1.
490 Series Microscope 2.2 Assembly 2.2.1 Carefully Remove Microscope from Box Remove the microscope body from the box and remove the plastic protective covering. The body of the microscope is composed of the base, the stage, the arm, and the nosepiece. 2.2.2 Loosen the Head Lock Screw Loosen the metal knob located directly above the nosepiece (the head lock screw) completely. 2.2.3 Install the Microscope Head Carefully take the microscope head out of the plastic bag, making sure not to touch glass.
490 Series Microscope 2.2.4 Install the Trinocular Port and C-Mount (For Trinocular Microscopes Only) Unscrew and remove the photo port cap from the top side of the microscope head. Screw in the Trinocular port If your camera has a c-mount, insert the c-mount adapter onto the Trinocular port. If your camera does not have a c-mount, you can skip this step. 2.2.5 Insert Eyepieces Remove the eyetube caps. Place the desired eyepieces into the empty eye/ocular tubes. Be sure to avoid touching the lenses.
490 Series Microscope 2.2.6 Insert Objective Lenses Unpack the objective lenses. Screw the objectives into the microscope nosepiece. Start with the lowest magnification, and in order of magnification, insert each lens, without touching the glass. 2.2.7 Plug it in, turn it on, and adjust the dimmer if more light is needed. Plug in the microscope and turn it on. If no light emerges from the light source, adjust the dimmer knob on the side of the base.
490 Series Microscope 2.3 Adjusting the View 2.3.1 Choose forward or reverse viewing The microscope head rotates to allow for forward or reverse viewing. There is no difference as far as the optics; it depends on what’s comfortable. In forward position you are looking over the stage, in reverse position you are looking at the stage. Once you’ve chosen your preferred microscope head position, lock the head-lock screw. 2.3.2 Focus the distance between your eyes.
490 Series Microscope 2.4 Specimen Set Up 2.4.1 Prepare the Specimen Place the specimen to be studied on a glass slide (or use a prepared slide, sold separately). 2.4.2 Secure the Slide Place the slide on the stage, holding it snugly in place with the metal slide holders (clips) of the mechanical stage. 2.4.3 Center the Specimen Using the mechanical stage controls, center the slide over the stage opening, lining it up with the light and the objective lens.
490 Series Microscope 2.5 Focusing 2.5.1 Choose an Objective Lens Turn the nosepiece to choose an objective. It is easiest to use the lowest magnification first (4X objective) to locate and focus on the specimen. As you move up in magnification you will need to refocus the image a little each time. 2.5.2 Parfocal Under the diopters on the eyepieces, there are numbered rings. Set these rings to 0 and the image should remain in focus for the entire magnification range.
490 Series Microscope 2.6 Using the Trinocular Port The AmScope T490 models are uniquely designed so that you can view the image through the eyepieces and the Trinocular port simultaneously, as well as fine tune the focus of the camera with a C-mount focus adjustment. You do not need an adapter to attach your AmScope camera to the Trinocular port; however you may need one if you have a non-AmScope camera. Our photo port is a 23mm size. 2.
490 Series Microscope 2.8 Setting the Stage’s Stop-Limit 1. Unlock the stop-limit on the stage. 2. Adjust the stage to the desired maximum height. 3. Lock the stop-limit. This allows you to limit the movement of the stage from the bottom of the range up to the point it is set at. 4. To reset it, unlock the stage and reset the stage to the new height. If no limit is desired, simply unlock the stop-limit. 2.9 Adjusting Focus Tension 1.
490 Series Microscope 2.10 Setting the Condenser Lens Adjustment Knob The condenser adjustment knob raises and lowers the condenser’s distance to the base lens, varying light delivery. 2.11 Adjusting the Iris By changing the aperture (hole size) of the iris/diaphragm of the condenser, you can adjust the background brightness. Adjust the aperture of the iris diaphragm using the iris adjustment slider located directly under the stage. 2.12 Changing a Filter 1.
490 Series Microscope 2.13 Changing the Halogen Light Bulbs 1. Turn off and unplug the microscope. 2. Wait until the bulb cools down. 3. Do not touch the bulb directly, the oil from your skin will damage the bulb. Use a cloth or paper to handle. (Microscope Base) 1. Be sure to remove the eyepieces from the unit before turning the microscope over to prevent them from falling and breaking. 2. Carefully turn the microscope on its side, exposing the base. 3.
490 Series Microscope 2.15 Using Oil Immersion When using the 100X objective, a drop of immersion oil should be placed between the cover slip and the objective to minimize distortion caused by air. 1. Place the slide on the stage and center the specimen. 2. Close the condenser’s aperture iris and ensure that the specimen focused and centered as possible. Increase light intensity once the specimen is clearly illuminated. 3. Move the objectives out of the way to enable access to the slide.
490 Series Microscope 6. Adjust the focusing knob, watch for the field of view to come into focus. This is best seen when the iris of the condenser is smaller than the field of the objective. Use the fine focusing knob to make adjustments. 7. Re-engage the stage stop limit. 8. When the specimen is in focus, adjust the iris to open just larger than the condenser’s diameter. 9. After using the oil immersion lens, you will need to clean the lens and specimen before the oil dries.
490 Series Microscope 2.16 Using Darkfield Condenser Lenses (Optional Accessories) Darkfield Illumination is a lighting method for increasing contrast. A darkfield condenser lens produces bright images against a dark background for low contrast specimens. The dry darkfield condenser is for low power magnifications, such as with the 4X, 10X or 40X objective lenses, with numeric apertures of .65 or less.
490 Series Microscope 2.17 Using a Dry Darkfield Condenser Lens (Optional Accessory) 2.17.1 Using the Dry Darkfield Condenser 1. The first step is centering the condenser. Move the 10X objective lens into the light path. 2. Remove an eyepiece and look through the empty eye tube, to see the condenser’s image directly. 3. Use the condenser lens adjustment knob to adjust the height of the condenser until the opaque disc is slightly smaller than the entire image circle, leaving a ring of light. 4.
490 Series Microscope 2.18 Using Oil Darkfield Condenser Lens (Optional Accessory) The condenser works with 100X oil objective and low power objectives (4X, 10X, etc) as well. Immersion oil is needed on top of the condenser lens for darkfield observation. Immersion oil is needed between the 100X oil objective and slide. 2.18.1 Using the Oil Darkfield Condenser 1. The first step is centering the condenser. Move the 40X objective lens into the light path. 2.
490 Series Microscope 2.18.2 Using Oil Immersion 1. Before you install the oil darkfield condenser lens, apply a drop of immersion oil on the top lens of condenser. If you’ve already installed it, remove the condenser to apply the drop of oil to the lens, and re-install it. You might need to re-center the condenser. 2. Place the slide on the stage. 3. Raise the condenser and let the oil drop contact the underside of the slide.
490 Series Microscope 2.18.3 Cleaning the Oil Darkfield Condenser 1. When using oil immersion, once you have finished using the oil darkfield lens, you will need to clean the lens and specimen of the oil before it dries. 2. You can wipe the lens with a soft nonabrasive cloth to remove the oil. If you want to use a cleaner, you can use cigarette lighter fluid to safely remove the oil, as it will break it down.
490 Series Microscope 2.19 Using a Phase Contrast Kit (Optional Accessory) Brightfield Phase Contrast Some specimens may offer little in the way of color-variance or opacity and can appear essentially invisible when using basic, transmitted light. Phase-contrast is a technique used in microscopy to enhance the contrast of an image, when observing a specimen which offers little contrast in normal bright-field conditions.
490 Series Microscope As waves of light move through space, if their cycles move in a perfect parallel and are at the same point in their cycles, they are inphase. If some of the light waves hit an obstacle and the phases of the waves are altered, so they are no longer in parallel and at the same point in their cycles, they are out-ofphase. When a light wave passes through any medium, the medium can affect the light wave’s length, amplitude, frequency and phase.
490 Series Microscope A phase contrast system incorporates two components to segregate light, so out-ofphase waves can be realigned. The two components are the annulus in the condenser and the phase ring in the objective lens. The condenser’s annulus separates light into surround light and diffracted light. Light passing directly through the annulus creates a hollow cone called surround light. This light passes directly through the optical system and is intercepted by the phase ring in the objective lens.
490 Series Microscope AmScope’s PCS Simple Phase Contrast Kit includes three phase-contrast objective lenses, three phase contrast condenser lenses, and a centering telescope. AmScope’s PCT Turret Phase Contrast Kit includes four phase-contrast objective lenses, a condenser turret, and a centering telescope. The turret has built-in annuli, designed to work with each of the lenses, as well as a brightfield iris.
490 Series Microscope 2.20 Using a Simple Phase Contrast Kit (Optional Accessory) 2.20.1 Unpacking the Simple Phase Contrast Kit 1. Take the aluminum case containing your kit out of the cardboard carton. Remove the tape and open the container carefully so as to avoid dropping and damaging the optical items. You may need to use the key taped onto the box. Check carefully to ensure that all parts and accessories are intact.
490 Series Microscope 2.20.2 Focus the Specimen 1. Once you have installed the phase contrast kit, you will need to calibrate and center the light perfectly for optimal results. You will initially calibrate with the Abbe brightfield condenser. 2. Place a slide on the microscope stage. Make sure the specimen is covered with a cover slip (a good example for a phase contrast specimen is human saliva). Clean any excess material from the slide. 3. Make sure your Abbe brightfield condenser is installed. 4.
490 Series Microscope 4. Change the objective lens to the 10X phase contrast lens. Objective lenses designed for phase contrast will be marked “Ph”, this denotes the objective lens has a built-in phase ring. Note: there are 3 phase contrast objectives: 10X, 40X and 100X, and there are 3 condenser ring plates: 10X, 40X and 100X. The corresponding objective and ring plate must work together. For example, the 10X phase contrast objective must work with the 10X condenser ring plate. 2.20.
490 Series Microscope 4. If the bright ring is still obscure, raise or lower the condenser by adjusting the condenser focusing knob (or the microscope focusing knob if necessary) until the bright ring is in focus and the dark ring is visible. 5. If the two ring images are not positioned so one is inside the other, adjust the centering screws on the condenser ring plate until the two rings center in parallel.
490 Series Microscope 2.20.5 Perform the Phase Contrast Observation After you center the condenser, you can perform the phase contrast observation the same way as a normal brightfield microscope. Note: When changing to another phase contrast objective and corresponding condenser ring plate, the focusing and centering of bright ring and dark ring should be repeated following the procedures above. Tips: 1. Make the illumination as bright as possible. 2. The thinner the specimen, the better the image.
490 Series Microscope 2.21 Using a Turret Phase Contrast Kit (Optional Accessory) 2.19.1 Unpacking the Turret Phase Contrast Kit 1. Take the aluminum case containing your kit out of the cardboard carton. Remove the tape and open the container carefully so as to avoid dropping and damaging the optical items. You may need to use the key taped onto the box. Check carefully to ensure that all parts and accessories are intact.
490 Series Microscope 2.21.2 Installing the Turret Phase Contrast Kit 1. Loosen the lock screw and remove the Abbe brightfield condenser from the holder. 2. Insert the phase contrast condenser turret into the condenser holder and tighten the lock screw with the screw driver. Due to the weight of the turret, it’s best to use the screw driver to securely fasten the turret to the condenser holder. 2.21.3 Focusing the Turret Phase Contrast Kit 1.
490 Series Microscope 2. Place a slide on the microscope stage. Make sure the specimen is covered with a cover slip (a good example for a phase contrast specimen is human saliva). Clean any excess material from the slide. 3. Turn the phase contrast condenser’s turret to the B setting. Focus the specimen. Before aligning the phase contrast lens and condenser, you will need to bring the specimen into focus with the brightfield setting. 4.
490 Series Microscope 3. While looking through the telescope lens, extend the eyepiece by rotating the top counter clockwise. 4. Keep rotating the telescope lens until an image of the objective’s phase ring and the condenser’s annulus are clearly in focus. 5. By slowly moving the annulus on the underside of the turret, now in-line with the condenser’s lens, the annulus’ bright ring of light should overlap the dark grey ring, which is the objective’s phase ring 6.
490 Series Microscope 2.21.5 Perform the Phase Contrast Observation After you center the ring plate, you can perform the phase contrast observation the same way as a normal brightfield microscope. Note: When changing to another phase contrast objective and corresponding condenser ring plate, the focusing and centering of bright ring and dark ring should be repeated following the procedures above. Tips: 1. Make the illumination as bright as possible. 2. The thinner the specimen, the better the image.
490 Series Microscope 2.22 Microscope Maintenance 2.22.1 Handle with Care As the microscope and all accessories are precision instruments, always handle them with care, avoiding impact or abrupt movement during transportation. Do not shake the package. 2.22.2 No Sun/Heat Do not place the microscope and accessories in direct sunlight or in high heat. Keep the microscope and all accessories indoors in a dry and clean place with temperatures between 32°-100° F (0°-40°C), maximum relative humidity: 85%. 2.22.
490 Series Microscope 2.22.8 Do not take apart the microscope. Do not assemble or disassemble the microscope’s electrical components yourself. . 2.23 Darkfield Condenser Kit & Phase Contrast Kit Maintenance 2.23.1 Secure Setting Ensure that the microscope is located on a smooth, level and firm surface. 2.23.2 Do Not Take Apart Do not attempt to disassemble any components. 2.23.3 Keep Kits Clean Keep the kits clean; remove dirt and debris regularly.
490 Series Microscope 3. General Specifications 3.
490 Series Microscope 3.2 Objectives Type DIN Achromatic Objective with Associated N.A. Ratings (195mm) Plan Objective (195mm) Numerical Aperture Model (N.A.) Number Magnification Rating Medium Magnification Marks (Color Ring) A4X A10X A40X A60X A100X PA4X PA10X PA40X PA100X Air Air Air Air Cedar Oil Air Air Air Cedar Oil Red Yellow Light Blue Dark Blue White Red Yellow Light Blue White 4X 10X 40X 60X 100X Plan 4X Plan 10X Plan 40X Plan 100X 0.10 0.25 0.65 0.85 1.25 0.10 0.25 0.65 1.25 3.
490 Series Microscope 3.5 Phase Contrast Kits Specifications Model Phase Contrast Objective Numerical Aperture (N.A.) Rating Turret Ring Plates Centering Telescope Simple Phase Contrast Kit PCS Turret Phase Contrast Kit PCT Achromatic 10X/0.25, 160/0.17 with built-in phase plate Plan phase contrast 10X/0.25, 160/0.17 Plan phase contrast 20X/0.40, 160/0.17 Achromatic 40X/0.65, 160/0.17 with built-in phase plate, spring Plan phase contrast 40X/0.65, 160/0.17 Achromatic 100X/1.25, 160/0.
490 Series Microscope 4. Parameters 4.1 Electrical System There are two options for electrical systems for this series of microscope. The light source is dependent on which model you have, but can either be a 6V/20W halogen, a 6V/30W halogen, or an LED system. 1. 100V-120V power supply: 100V-120V ±10%, 50/60Hz. 2. 220V-240V power supply: 220V-240V ±10%, 50/60Hz. All units come standard as 110V units unless an upgrade to a 220V system is requested. Upgrade fee is dependent on which unit is purchased. 4.
490 Series Microscope 5. Recommended Accessories (Purchase separately. Please visit www.amscope.com and search with SKU #, for more information.) 5.1 Eyepieces 5X Eyepieces 20X Eyepieces 25X Eyepieces SKU: EP5X23 SKU: EP20X23 SKU: EP25X23 10X w/ Pointer 10X w/ Reticle SKU: EP10X23P SKU: EP10X23R 5.
490 Series Microscope 5.3 Objective Lenses Achromatic 2X SKU: A2X 5X SKU: A5X 20X SKU: A20X 60X SKU: A60X Plan 10X SKU: PA10X Plan 40X SKU: PA40X Plan 100X SKU: PA100X Plan Achromatic Plan 4X SKU: PA4X 5.
490 Series Microscope 5.5 Cameras and Accessories Cameras To capture images, video, or view live display on a computer (PC/Mac OS X). RealTime Live Video Microscope Digital Camera, Reduction Lens, High Sensitivity Sensor and Deluxe Calibration Kit. 350K Pixel SKU: MU035 1.3 Mega Pixel SKU: MU130 3 Mega Pixel SKU: MU300 5 Mega Pixel SKU: MU500 8 Mega Pixel SKU: MU800 9 Mega Pixel SKU: MU900 10 Mega Pixel SKU: MU1000 Calibration Micrometer Calibrate the camera software for on-screen measurements.
490 Series Microscope 5.6 Halogen Light Bulbs and Fuses 6V 20W Halogen Bulb SKU: BH6V20W Fuses For Microscopes SKU: FS-M T1AL 220V 6V 30W Halogen Bulb SKU: BH6V30W 5.7 Cases and Bags Aluminum Case SKU: AC-B400 Hard Wood Case SKU: WC-B400 Vinyl Bag SKU: CB-B490 5.
490 Series Microscope 5.9 Slides Prepared 25 Slides SKU: PS25W 50 Slides SKU: PS50 100 Slides SKU: PS100A 200 Slides SKU: PS200 144 Blank Slides SKU: BS-144P200S-22 300 Blank Slides SKU: BS-300P300S Blank 50 Blank Slides SKU: BS-50P-C 100 Blank Slides SKU: BS-100P100S-22 5.10 Cleaners Sparkle Microscope Optical Lens Cleaner SKU: CLS 3 in 1 Professional Cleaning Kit for Microscopes, Cameras and Laptops SKU: CK-I 3 in 1 Cleaning Kit for Microscopes, Cameras and LCD Screens SKU: CK-II 5.
0 Series Microscope 6. Troubleshooting 6.1 Optical Issues SYMPTOM SYMPTOM One side of the field of view is darker Obstructions are observed in the field of view Unclear Image The color of the image is not accurate CAUSE OPTICAL ISSUES The nosepiece is misaligned. Stains, dust, or dirt has accumulated on the objectives or eyepieces. Stains, dust, or dirt has accumulated on the specimen. Stains, dust, or dirt has accumulated on the objective, eyepieces, or Barlow lens.
490 Series Microscope SYMPTOM CAUSE OPTICAL ISSUES One side of the field of view is dark or the image moves while focusing The field of view is not bright enough REMEDY The specimen slide is not fixed. The nosepiece is not in the right position. Secure the slide to the stage with clips. Turn the nosepiece until it clicks into place. The iris diaphragm is too small. Adjust the iris diaphragm to allow the light to be just larger than the condenser. The condenser is not in the right position.
490 Series Microscope 6.3 Electrical Issues SYMPTOM The bulb/light source flickers. The microscope does not light up. CAUSE ELECTRICAL ISSUES REMEDY The bulb is close to burning out. Replace the bulb. This unit uses our BH6V20W with our 20w unit or our BH6V30W for the 30W unit. The microscope is unplugged. Insert the plug into the wall socket to achieve electrical illumination. The bulb is not inserted correctly.
490 Series Microscope 7. General Microscopy Guide Microscopes come in a wide variety of types with many different features. Each AmScope model is designed for specific uses and specific users. This glossary will help illustrate what the variations mean and why they are useful. Compound and Stereo Microscopes Using a compound or a stereo microscope depends on the specimen being studied. Compound microscopes are best for smaller transparent specimens, like slides and biological subjects.
490 Series Microscope Base Lens Base lenses direct the light source towards the specimen. Binocular Head-Rotating A rotating binocular head is designed for maximum flexibility in viewing options. Binocular microscope heads allow for the easy adjustment of the interpupillary distance (the distance between the eyes), by moving the eyepieces toward or away from each other... The rotating feature allows for either forward or reverse view, depending on whether you’d rather look at the specimen or over it.
490 Series Microscope Condenser Lens Adjustment Knob The Condenser Lens Adjustment Knob changes the distance between the light condenser and the base lens. This allows you to control the concentration of the light hitting your slide. Darkfield Condenser Lens A darkfield condenser lens produces bright images against a dark background for low contrast biological specimens. With brightfield lenses, a solid beam of light illuminates the objective lens.
490 Series Microscope Diopters Small rings on the eyetubes, used to focus ocular lenses (eyepieces). Eye Guards Eye Guards fit over the eyepieces, they are for comfort and to protect the glass in the eyepiece. Eyepieces Eyepieces are also called ocular lenses. Eyepieces come in many magnifications and you replace them by swapping them out of the eyetubes. The eyepieces magnify the specimen further from the first magnification through the objective lens. Each eyepiece is marked with 2 numbers.
490 Series Microscope Field of View and Working Distance Field of view is how much of the specimen you can see through the eyepiece. The linear field of view of the eyepiece is divided by the magnification of the objective. The higher the magnification, the smaller the field of view. Working distance is the distance between the bottom of objective lens and the stage. You change the working distance when you use the coarse focusing knob.
490 Series Microscope Focusing Knobs Coarse Focus: This is the large knob on the side of the microscope that moves the objective lens up and down. It is used in conjunction with the fine focus. Do not use this knob with the 100X objective lens. Fine Focus: The outer knob, used to fine-tune the focus of a specimen in conjunction with the coarse focus. Head Lock Screw The head lock screw secures the microscope head to the microscope. Loosen the head to rotate between forward and reverse mounting.
490 Series Microscope Head Types Monocular Monocular microscope heads have one eyepiece. Binocular Binocular microscope heads have two eyepieces. Trinocular Trinocular microscope heads have two eyepieces and a photo port for a camera. This allows you to look at a specimen with a camera without removing an eyepiece. Multi-head Multi head microscopes are specially designed for three-person observation. Ideal for teaching and/or training purposes. It has a binocular head and two monocular heads.
490 Series Microscope Immersion Oil A special oil used with the 100X objective to concentrate the light and increase the resolution of the image. At high magnifications the field of view is so small that very little light passes. The light refracts, scatters and produces a dark image. A drop of oil is placed on the slide’s cover slip and the objective is lowered until it touches the oil.
490 Series Microscope Light Bulbs-Caution 1. Turn off the microscope when not in use to preserve the life of the bulb. 2. Never touch a light bulb directly, especially when it’s turned on. a. The light bulbs can get hot enough to burn skin. Wait until the bulb has cooled completely before handling it. b. The oil from your skin will create a hot spot on the bulb which will damage the glass, dramatically shortening the life of the bulb. c.
490 Series Microscope Limit Stop Knob The limit stop is designed to prevent impact between objective and slide. You may loosen the limit-stop knob in order to give yourself the full range of motion for fine tuning the focus when using the 40X and 100X objective lenses. When the limit stop is off you will be able to damage the microscope or the glass slide. For safety, engage the limit stop once you have it close or in contact with the objective (if using oil contact is required).
490 Series Microscope Numerical Aperture (N.A.) N.A. is a rating for the resolution of the objective lens. The N.A. rating ranks the objective lens’ ability to capture light and show fine detail. Lens with larger numerical apertures capture finer details than lenses with smaller numerical apertures. Generally, lenses with larger numerical apertures create a brighter image, but the depth of field will be shallower. N.A. Rating Average Objective Numerical Lens Aperture 4X 0.1 10X 0.25 40X 0.65 100X 1.
490 Series Microscope Phase Contrast Condenser Lenses A specific condenser with a ring printed on it, used for phase contrast. The magnification of the objective must match the magnification of the condenser. Condensers are used to concentrate the light from a transmitted light on a sample for illumination and viewing. Phase Contrast Condenser Assembly For phase contrast kits without a turret, the condenser assembly is the mount for the condenser lenses.
490 Series Microscope Telescope Lens-Centering A lens that telescopes in one way or another, used in an eyepiece slot to assist in centering the light in phase contrast microscopy. Tension Knob The large, innermost ring on the focusing knob. Adjusts the tension of the focusing knobs. Trinocular Port A trinocular microscope has three viewing ports. There are two eyepieces and a third port for photography and video. The trinocular port is a 23mm adjustable photo port and uses a C-Mount adapter.
