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Starlight Xpress SXVR-H694, Руководство пользователя

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Starlight Xpress SXVR-H694 Скачать руководство пользователя страница 13

Handbook for the SXVR-H694

Issue 1 March 2012

13

Processing a deep-sky image:

The following instructions include the subtraction of a dark frame, but this may be
regarded as optional.

1) Make sure the ‘Auto Contrast Stretch’ is switched off and load your image into
SXV_hmf_usb. Select ‘Merge’ and then ‘Subtract Dark Frame’. Pick the appropriate
dark frame and the software will then remove the dark signal from your image,
leaving it somewhat darker and slightly smoother than before.

Содержание SXVR-H694

Страница 1: ...mal noise Other features include a built in fully programmable USB 2 super fast computer interface an autoguider control port and output and optional integrated dual serial ports for filter wheel and...

Страница 2: ...ind the following items 1 The SXVR H694 camera head 2 A universal AC power supply module 3 A USB camera cable 4 An adaptor for 1 25 drawtubes with a 1 25 filter thread 5 An adaptor for 2 drawtubes and...

Страница 3: ...dows Explorer to open with the list of folders on the ROM Now run the SETUP EXE file that it contains this will initiate the self install software which will guide you through the process of installin...

Страница 4: ...lowing the on screen instructions will allow you to re select the correct inf file from the CD SXVIO_H694_194 inf and driver files SXVIO sys and generic sys which should fix the problem Now connect up...

Страница 5: ...nd you should use a set point of no lower than 5C for stable cooling You can determine the optimum settings for your camera and ambient conditions when you have some experience of using the system but...

Страница 6: ...f the adaptor and pricking its centre with a small pin If you use a normal lens then stop it down to the smallest aperture number possible usually F22 as this will minimise focus problems and keep the...

Страница 7: ...wing points 1 Ensure that the power indicator lamp is on and that the cables are properly home in their sockets 2 If the screen is completely white the camera may be greatly overexposed Try a shorter...

Страница 8: ...pointer positions until the image has a pleasing brightness and crispness At this point you will have a working knowledge of how to take and process an SXVR H694 image It is time to move on to astron...

Страница 9: ...or tri colour imaging If you use a focal reducer using it at maximum reduction may cause the relatively large chip of the SXVR H694 to suffer from considerable vignetting dimming towards the corners a...

Страница 10: ...File menu again and click on Focus frame centre you can now use the mouse pointer to click on the star image and the new focus frame co ordinates will be displayed Now return to the camera interface w...

Страница 11: ...are good examples Use the finder to align on your chosen object and then centre accurately by using the focus frame and a short exposure of between 1 and 5 seconds The 12 16 bit slider in the focus f...

Страница 12: ...enerated during your exposure and it should be saved with your image for use in processing the picture If many such darks are recorded and averaged together the statistical noise will be reduced but t...

Страница 13: ...k frame but this may be regarded as optional 1 Make sure the Auto Contrast Stretch is switched off and load your image into SXV_hmf_usb Select Merge and then Subtract Dark Frame Pick the appropriate d...

Страница 14: ...ion if necessary to correct a mistake 4 The image will now look quite impressive and I hope that you are pleased with your first efforts In many cases a Normal contrast stretch will give a good result...

Страница 15: ...nets are bright and very small needing long focal lengths and short exposures High resolution is critical to achieving good results and I have already shown how a suitable focal length can be calculat...

Страница 16: ...the highlights and cause white patches on the image With the recommended focal length Jupiter and Mars will both need an exposure time of between 0 1 and 1 seconds and Saturn will need between 0 5 an...

Страница 17: ...anetary images together to improve the signal to noise ratio In this case the averaging option should always be used or the result is likely to exceed the dynamic range of the software and saturate th...

Страница 18: ...star if the guider frame is aligned with the RA and Dec axes Now connect the head to the camera using the 18 way connector lead including the port divider box if it is to be used The recommended way o...

Страница 19: ...refractor guide scope in the author s garden the camera shown is the older SXVF version but the connections are the same To use the autoguider please proceed as follows 1 Having started the SXVR H694...

Страница 20: ...t for imaging is properly framed in the main CCD image leave the guider menu and use the main camera control panel as necessary 6 Re open the guider control panel start imaging and try to locate a cle...

Страница 21: ...lar you may need to alter the guiding parameters or investigate the rigidity and drive performance of your mount A lot of information can be deduced by watching the behaviour of the guide star in the...

Страница 22: ...posure Options and select a number of exposures to take You can also select to average the images rather than adding them and there is a Alternative Slew Mode available which uses the correlation of i...

Страница 23: ...The other necessity for recording a good flat field is a source of very even illumination of the telescope field This is surprisingly difficult to achieve and many designs of light source have appeare...

Страница 24: ...SXVR H694 accessory ports The SXVR H694 is provided with two ports for use with accessories The Autoguider output port is a 6 way RJ11 socket which is compatible with the standard autoguider input of...

Страница 25: ...an the CCD you will need a good quality lens cloth no silicone or tissues and some high grade acetone or isopropyl alcohol A very suitable cloth is the Micro Fibre type marketed by PENTAX etc and suit...

Страница 26: ...effective try opening the main barrel and loosening the stand offs to allow a gap to form between the heat sink and the front barrel assembly Now put the camera into a desiccator box as above or leav...

Страница 27: ...4 54uM square Well depth Full res mode 18 000e Binned 2x2 mode approx 22 000e Mean visual QE 70 77 at peak 580nM Useful spectral response 360nM 1100nM Readout noise Approx 4e RMS typical 8e max Back f...

Страница 28: ...l only be used for normal purposes described in the standard operating instructions and within the relevant safety standards of the country where the equipment is used 2 Repairs under guarantee will b...

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