"Panorama mode" which was the first built -in with a telescopeCOVALENSIs a function that allows you to see the area larger than the field of view of the telescope, and can create a panoramic image of the universe.VesperaandStellinaEven in the case, it is now possible to provide innovative observation modes that can automatically obtain a much larger sky scenery than usual. In other words, you can have windows to a wider space with the same view station, and you will have the opportunity to shoot other unparalleled images.
1 -What are the new possibilities that mosaic shooting will bring?
2 -How is a mosaic shooting?
3 -How to use mosaic mode at your view station?
1 -What are the new possibilities brought about mosaic shooting?
With StellinaVesperaThere is a certain field of view determined by the focal length of each device and the size of the sensor.
In the case of Stellina1°×0.7°、VesperaIn the case of1.6°×0.9°It will be a view of.
Not only the moon and the sun can be observed with the optional solar filter, but the number of deep cosmic objects is small, so you can observe and shoot the whole. However, some of them are large in size, and there are astronomical and astronomical groups where the whole image is invisible. For example, the Andromeda large nebula is about the long side3°(Full moon6Double! )is.
Mosaic mode isStellinaorVesperaYou can expand your field of view and see larger celestial and space areas. It's like another observation station for the large area.
By mosaic shooting
- Andromeda galaxies, rose nebula (Ikukurijushi), curaehehns, Heart Nebula (Cassiopeia seat), small Magellan clouds, and large stars such as Pleiades.The large celestial body of the Deep Sky Outjection can now be more perfect.
- Large star clouds in Orion, horses leader clouds, terrantula -star clouds, areas where there are many star clouds in the center of the Milky Way.You can know the large nebus environment better.
- Lagoon nebula, Sanmata nebula, etc.Star cloudsor,M46orM47You can see the star clusters where several stars such as (Usamiriza) gathered.
- Like Cambular Cascade (Kamakuraza),You can capture asterism and stars with special beauty.
- M81 andM82It was already possible to visualize the galaxy group in the same field, but it can visualize the larger groups, Shiziza Galaxy, Marcarian stars, and Komarian stars.
Andromeda galaxy taken in mosaic mode Vespera (unprocessed image, integral time: 2 hours). The image represents 2.8 ° x 2.1 ° FOV. The white rectangle represents the original view of Vespera, and the blue rectangle represents the original view of Stellina.
Differences in the dimensions and ratio of mosaics due to observation stations
Users have mosaic dimensions and ratioSingularity appYou can choose with the interface of3See the club). The maximum view of the sensor ratio is3.2 ° x 1.8 °and,StellinaThen2 ° x 1.4 °is.
Vespera users are maximum mosaic mode, higher than the resolution of the sensor.820You can shoot with all pixels.
In the case of Stellina, the mosaic maximum resolution is6.4It is mega pixel.
Mosaic framing is defined in connection with the north -south direction of the celestial sphere (equatorial direction).VesperaUsers do not depend on the orientation of astronomical objects in the field of view that changes depending on the observation time.
Innovative process to capture the wide -visual field images developed by Vaonis)2Refer to the part), which uses the effect of the "Dizing" effect (continuously shooting the same part of the sky in a different area of the sensor) to attenuate the effects of sensor -specific defects (noise, hot pixels), and higher quality. It is possible to obtain the final rendering.
Main specifications of mosaics
|Telescope unique field of view||1 ° x 0.7 °||1.6 ° x 0.9|
|Maximum field of field (sensor ratio)||2 ° x 1,4 °||3,2 ° x 1,8|
|Maximum field of field (square)||1,7 ° x 1,7 °||2,4 ° x 2,4 ° * 1|
|Expansion field maximum size (horizontal)||, 8 ° x 1 3||6 ° x 1,6|
|Expansion field maximum size (vertical)||0.7 ° x 4 °||0.9 ° x 6.4|
|Maximum resolution of extended fields||6.4 mpx||8.2 mpx|
2 -What is the mosaic capture mechanism?
VAONIS has developed an innovative image capture method that allows you to obtain images in the expansion field at the optimal time, and at the same time to stamp the image that is essential to rendering satisfactory quality with astronomical photos. 。
Mosaic creation is completely automated.
When the observation is started in mosaic mode, the observation stationSingularityGradually scan the field defined in the application while shifting the direction of the telescope in small pieces. At the same time, images for configuring mosaics are also taken. When the image is incorporated, the large overlapping part is used for stacking.
The video below isSingularityThe time lapse of this process that you can see in the application.
In order for an observation station to scan the entire expansion field and output high -quality images of the mosaic, it requires about 60 minutes of viewing time (integrated time displayed in the Singularity app).
If you continue to observe even after the mosaic is completed, you can use the additional time to add a field scan to gradually improve the overall image quality of the final image.
After observation of 120 minutes (SingularityIn the integrated time displayed in the app), the image of the entire field is greatly improved, and you can manually handle images manually to bring out detailed details.
Caption: Andromeda Galaxy M31 was taken for 2 hours with VESPERA and processed in Affinity Photo and StarNet ++ applications (image: Sébastien AUBRY- @adventurerofththerplanet)
VesperaA rose nebula taken with Affinity Photo and StarNet ++ application at 2.5 hours of accumulation time. The frame displayed on the image represents the original view of Stellina (blue) and Vespera (white). (Image: Sébastien AUBRY - @adventurerofthetic)
3 -How to use panoramic mode at an observation station
Singularity is a simple and intuitive interface, so you can select the area of the sky to take a mosaic while taking into account the size and shape of the celestial body you want to put in the image.
With vesperaStellinaAs with all observations, the starting point for gaining an extended vision isSingularityFinding the target on the application's Explorer page. In the beta version, the mosaic mode works with the manual target, but "Plan My Night (Make an observation plan)It is not compatible with the function.
TargetSingularityIf it is not listed in the catalog, you can select another nearby object that can be used in the catalog, navigate or define a manual target.
When the target is identified,SingularityProvides options for starting normal views or starting mosaics.
If you select the latter, a map of the surrounding objects centered on the target will be displayed.
On the map, large nebus shows the overall shape, and the size and direction of the galaxies and starters. The brightest star is also displayed.
While white squares overlap on the map, this is a field that is photographed by the observation station when mosaic is applied.
Pulling the handle in the four corners of this square can change the size and ratio of the area. In the banner at the top of the screen, the dimensions of the field are displayed in units.
Drag the map and enclose the target you want to include in the field.
Singularity interface to define the size and frame of the mosaic: (1) Pull the handle of the frame to change the ratio to (2) Move the map to adjust the composition.
Once the frame is decided, when the view is started, the telescope starts shooting the mosaic and displays the progress in real time while obtaining individual images.
About before the mosaic is completed60I understand. However, if the image at the middle is fine, the processing can be stopped at any time. And you can save or export as it is.
However, please note that you cannot resume the mosaic you have interrupted once. You need to start the shooting from the beginning. Similarly, if you give a reflex in the middle of the mosaic, the capture will be interrupted and will be (automatically) from the beginning.
Example in which the mosaic framework is defined in Singularity for various areas of the sky: (1) Shade -like star clouds
Save and write mosaic images
Like normal observations, you can always save and export mosaics images. The result of the mosaic isJpegIf you want to perform image processing manually or manuallyTiffIt can be obtained in format.
StellinaUSBMemoryVesperaEnabling the function of saving the file in the built -in memory of the mosaic all steps.JpegThe last state of the file and the before the view is interruptedTiffFormatRAWThe file is saved. It was also used for mosaic stacks and synthesisFitsYou can save all the unit images of the format. however,FitsFormalRAWPlease note that in order to use the image, it is necessary to manually synthesize and stack the mosaic using a dedicated application.
TIFF format live image files are synthesized with mosaics (stacking is performed at a desire station) and can be used directly with image processing software.
The area of Orion large star clouds. Vespera taken in 2 hours and 30 minutes and processed in Affinity Photo and StarNet ++ application (image: Sébastien AUBRY- @adventurerofththerPlanet)