Post-stack processing with these images was minimal; I used the Brightness Scaling Tool with Sigmoid scaling, and touched up the final contrast before exporting the images you see here. I make sure that I’ve got the right filename set up, check the dark-subtract box, verify that it’s set to save all images, reset the long exposure time to 30 seconds, and then leave everything alone for 10 to 20 minutes while 20 to 40 images accumulate. Then, when you take an image, Envisage looks for the dark frame with the closest temperature match and subtracts it automatically to get rid of the noise — a really nice touch. I use Meade’s Envision software to capture the image sequences. Then I lock the focus, close down Magnifier, increase the exposure to 2 seconds, move to my target, and center it. This review appeared in the January issue of Sky at Night Magazine.
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Meade DSI Pro II Review | BBC Sky at Night Magazine
The Ring Nebula picture was taken in the fall of from my half-completed observatory. The sensitivity of the camera was terrible. A detailed s exposure of M27, but without a software fix the raw image suffers from too much noise.
Return to Richard Berry’s Home Page. Stargazing breaks in the UK.
This improves image resolution, increases the image dimensions and acts as a field de-rotator, di long as your telescope is controlled by AutoStar. Maybe I was a little jealous, or maybe just plain curious, but I had to see what Meade had accomplished. On a cool night you can expose for several minutes.
Meade Deep Sky Imager Fan – for all Meade DSI models
However, long exposures showed that the noise was evenly distributed across the image with no unwanted gradients. This proved to be true: Jim tried it first. A sensor inside the camera takes the temperature of the chip and displays the data on your computer screen. I then use MicroSoft’s Magnifier program to blow up the image really big on the screen. Focusing is easy because my Newtonian’s diffraction spikes split into two parallel lines when the image is slightly out of focus.
Cookies perform functions like recognising you each time you visit and delivering advertising messages that are relevant to you. AutoStar Suite has everything you need to plan, capture and process your images. I make sure that I’ve got the right filename set up, check the dark-subtract box, verify that it’s set to save all images, reset the long exposure time to 30 seconds, and then leave everything alone for 10 to 20 minutes while 20 to 40 images accumulate.
Deep Sky Imager IV (DSI-IV)
Envisage is a clever program geared towards getting you the best image possible. He got it to work but gave up on it as a serious CCD camera. In summer, Meade’s software does a good job dark-subtracting second exposures and less well with second exposures. The field of view was microscopic.
This data is also recorded against dark frames whenever they are generated. The aluminum housing is crudely cast ds minimally machined. Then I lock the focus, close down Magnifier, increase the exposure to 2 seconds, move to my target, and center it. Find out where to buy your equipment with our Retailer Guide. The color rendition in the images was terrible. So what got me interested?
I use Meade’s Envision software to capture the image sequences. Then, when you take an image, Envisage looks for the dark frame with the closest temperature match and dxi it automatically to get rid of the noise — a really nice touch. Watch the latest episode on BBC iPlayer.
Deep Sky Imager (DSI) IV / Telescopes, Solar Telescopes, Binoculars, Spotting Scopes
Testing showed that Meade’s dark-subtraction did a pretty good job, and mead I set it so that the capture program would save every image in the FITS format, I could stack the images using AIP4Win to get what I consider better results than Meade’s software delivers.
He mentioned that the venerable Cookbook camera dzi been an inspiration for the DSI series. To view this digimag, Adobe Flash player is required. However, for monochrome imaging the DSI-Pro does well enough to be fun to mess around with.
Although this works well and the DSI exhibits fairly low heat-induced noise, it still produces noisy raw pre-processed images. And mdade companies like Meade know their customers: