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User Manual for the

Self Levelling Mount

type

SLM8

SLM8-UM-1.0

Delta-T Devices Ltd

Содержание SLM8

Страница 1: ...User Manual for the Self Levelling Mount type SLM8 SLM8 UM 1 0 Delta T Devices Ltd ...

Страница 2: ...language Copyright 2003 2009 Delta T Devices Limited Design Changes Delta T Devices reserves the right to change the designs and specifications of its products at any time without prior notice Author Nick Webb User Manual Version 1 0 Mar 23 2009 Delta T Devices Ltd 130 Low Road Burwell Cambridge CB25 0EJ UK Tel 44 1638 742922 Fax 44 1638 743155 email sales delta t co uk tech support delta t co uk ...

Страница 3: ...OS 50D Camera 8 Taking Hemiphotos 8 Image Size and Compression 8 Camera Settings 9 Exposure 9 Taking the Picture 12 Use of Canon Remote Controls 14 Downloading Images to a PC 14 Trouble Shooting 14 Image Alignment in HemiView 15 Setting the Lens Equation in HemiView 16 Appendix 17 Assembly of HemiView System Parts 17 Warranty and Service 19 Terms and Conditions of Sale 19 Service Repairs and Spare...

Страница 4: ... a Sigma EX DC 4 5mm F2 8 circular fisheye lens For ease of use the mount is equipped with the following features Bubble level and adjustable levelling weights Compass for North South alignment viewable from above or below Markers used to align hemispherical photos in HemiView illuminated by the camera flashgun Optional rugged carrying case Optional monopod or tripod Image capture processing and a...

Страница 5: ...l South marker Compass Sigma EXDC lens Canon EOS 50D Flash adapter Fibre optics light pipe Tripod North marker Balance weights Mounting the camera Locating pins Tighten bolt Levelling adjustments SLM8 User Manual v 1 Overview z 5 ...

Страница 6: ... system on a tripod or monopod 2 Orient it to North using the compass 3 Level it using the bubble level and balance weights 4 Select appropriate camera settings 5 Avoid camera wobble using the self timer or a remote control not supplied or a laptop PC running the Canon EOS image capture software 6 Use the live preview and review options in the camera or on a PC to check the image is OK 7 Replace t...

Страница 7: ...etely note it has two parts Rotate the mount to point North NORTH Level the mount using the balance weights and bubble level indicator Check the flash adapter and fibre optics are in place Balance weights SLM8 User Manual v 1 Setting up the Self Levelling Mount z 7 ...

Страница 8: ...will point you towards the appropriate sections of the camera manual Page numbers refer to current English version of the Canon manual Image Size and Compression There is a trade off between image quality and the number of images you can store on a memory card Keep image size at 4752 x 3168 pixels for maximum spatial resolution At this setting a typical hemiphoto will take 5 MB as a JPEG or 20 MB ...

Страница 9: ...d colour temperature of daylight coming through gaps in the canopy Saving Settings You may fine tune your settings and save the configuration on the camera using the camera controls You can also configure it from your PC using the Canon software See also the Canon 50D User Manual and EOS software manual Exposure Getting the exposure right can have a significant effect on how easy it is to classify...

Страница 10: ...setting Use this exposure setting for all your hemiphotos as long as lighting conditions remain the same The exposure meter will indicate over exposure for open canopy and under exposure in closed canopies 2 Auto Exposure Set the camera to Programmed Auto mode For more open canopies over expose using the exposure compensation setting up to the full 2 0EV for very open canopies 1 For more closed ca...

Страница 11: ...ghtness histogram for the whole image and shooting information are given Note the time stamp and the auto exposure setting changes Incidentally the dark evergreen tree lower left dominates the dark end of these histograms Depending on your objectives you might want to edit it out in Photoshop say before using HemiView SLM8 User Manual v 1 Taking Hemiphotos z 11 ...

Страница 12: ...ill blink and the shot will be taken about 10 seconds later Using PC Image Capture Software The Canon EOS 50D camera comes with a USB serial cable for connecting to a PC and Canon software on CD for acquiring and managing image files from the camera As an alternative to using the timer you may control the Canon 50D remotely via the USB serial cable connected to a notebook PC This has the advantage...

Страница 13: ...ss being controlled from a PC in the field using the Canon Software and then HemiView Using a rugged notebook with the Canon 50D a canopy can be viewed live camera settings adjusted image captured and automatically imported into HemiView SLM8 User Manual v 1 Taking Hemiphotos z 13 ...

Страница 14: ...se a counterbalance Downloading Images to a PC You are strongly recommended to read the Canon EOS 50D User Manual and the Canon EOS Software Windows Instruction Manual for full details There are many ways to transfer images out of the camera Images may be transferred via a USB cable using the Canon software The flash card may be removed and read by a flash card reader connected to your PC USB port...

Страница 15: ...tation and therefore the location of North was previously undefined in Hemiphotos HemiView software needs to be told where North is by dragging the north indicator to the North marker cone on the left To define the horizon correctly drag the white horizon line to intercept the flat top of the rim of each of the North and South markers as shown For full instructions refer to the HemiView manual and...

Страница 16: ...owing settings Settings Lens New Enter the coefficients in the Lens Properties dialog as shown below Field of View deg 180 0 a1 0 706900 a2 0 032900 a3 0 025600 a4 0 021097 When you exit HemiView this lens will be saved in the HemiView lenses csv file When using HemiView specify these lens properties for all hemiphotos taken with the Canon EOS 50D and Sigma 4 5mm EX DC lens 16 z Setting the Lens E...

Страница 17: ...era as described in the camera and lens manuals 3 Charge and install the camera battery as described in the camera manual 4 Fit a memory card as described in the camera manual 5 Set the lens to Manual and focus ring to Infinity as described in the camera and lens manuals 6 Release the Canon 50D built in flash p 110 of the Canon Instruction Manual and slide the SLM8 flash adapter clip over it SLM8 ...

Страница 18: ...t the balance weights so that the bubble indicator is within the central circle of the bubble level Tighten the thumbscrews to lock the weights in position 10 Re check the mount is level whenever you change the balance of the camera e g change the battery or flashcard or reposition the monitor The system is now assembled and ready for use 18 z Appendix SLM8 User Manual v 1 ...

Страница 19: ...arge or by repairing the goods free of charge at Delta T s premises in the UK during the warranty period If Delta T requires that goods under warranty be returned to them from overseas for repair Delta T shall not be liable for the cost of carriage or for customs clearance in respect of such goods However Delta T requires that such returns are discussed with them in advance and may at their discre...

Страница 20: ...delay We normally expect to complete repairs within one or two weeks of receiving the equipment However if the equipment has to be forwarded to our original supplier for specialist repairs or recalibration additional delays of a few weeks may be expected For contact details see below Technical Support Users in countries that have a Delta T distributor or technical representative should contact the...

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