Contains:  Solar system body or event
Nine-Day-Old Moon, June 30, 2020 (w/ PSRS), 



    
        

            AlenK

Nine-Day-Old Moon, June 30, 2020 (w/ PSRS)

Technical card

Imaging telescopes or lenses: Meade MTS-SN6

Imaging cameras: Pentax K-3 II


Date: June 30, 2020

Frames: 4

Focal length: 762


Resolution: 2551x2623

Data source: Backyard

Description

A prime-focus image at ISO 200. The exposure time was 1/250th of a second. However, this image was actually created from four exposures automatically taken in quick succession after pressing the shutter by a super-resolution feature called Pixel Shift Resolution System (PSRS).

PSRS uses the camera’s sensor-shift mechanism to move the sensor to four adjacent positions in order to capture complete color information for each pixel, avoiding a resolution loss from demosaicing. It also doubles the SNR. The result is a sharper, cleaner image than is possible with a single exposure, provided that atmospheric turbulence is low. The telescope also needs to be tracking.

All four exposures also use an electronic shutter, which avoids the shutter shock that normally blurs fine details at least as much as atmospheric turbulence. Note that a mirror-up shooting mode was used, so there were no vibrations due to mirror slap.

The Meade MTS-SN6 is a 6-inch f/5 Schmidt-Newtonian telescope from the 1980’s.

Comments

Histogram

Nine-Day-Old Moon, June 30, 2020 (w/ PSRS), 



    
        

            AlenK