Mehmet Ergün

Photographer: Mehmet Ergün
Title: M42 Orion Nebula
Image Data:

Camera: CentralDS Astro D850
Takahashi Epsilon 130
Hutech IDAS D1
Skywatcher EQ6R

EXIF:
30 x 4min
30 x 15sec.
30 x 3sec.

Date: 10.01.2019
Location: La Palma / Canary Islands

Software:
PI, PS, LR

Steve Siedentop

Photographer:Steve Siedentop
Title:  IC443, The Jellyfish Nebula

Image Data:

Date: January 5, 2019
Site: Jon Wood Astronomy Field Mansfield, Georgia USA
30 Lights, 15 Darks
ISO 1600, 300 Seconds
Central DS CDS-600D
Explore Scientific ED127CF FCD100 & .7 Reducer
Skywatcher NEQ6 Pro Mount
Processed with PixInsight

Luca Quondam

Photographer:Luca Quondam
Title:Cygnus Mosaic

Image Data:
Camera : CentralDS cooled 5D mark II
Telescope : Borg 71
ISO : 1600
13 panels mosaico (5min x20)
Site: Polino Appennino centrale Italy
process w Maxim DL , PS6

Luca Quondam

 

Photographer:Luca Quondam

Title:Orion Mosaic

Image Data:

Camera : CentralDS cooled 5D mark II
Telescope/Lens : canon 200 f2,8 af4,5
ISO : 1600
mosaico 12 x100 min (5min x20)
no guida con astro physics macth
Site: Polino Appennino centrale Italy
process w Maxim DL , PS6

Vincent Cheng

 

 

Photographer: Vincent Cheng
Title:Comet 46P/Wirtanen、Pleiades、Taurus Molecular Cloud
Image Data:

Camera : CentralDS Astro A7s (cooled at -6C)
Telescope/Lens : f/4 @ Canon 300mm f/4L non IS
ISO : 3200
Filter : Optolong UV-IR cut 2″
Tracking Mount : Star Adventurer
Autoguide : none

Date: 2018.12.17
Site: Heyuan, Guangdong, China
Total Exposure Time : 60s X 82frames
w Dark Frames, Bias Frames
process w PI, PS CC

Alessandro Cipolat Bares

Photographer: Alessandro Cipolat Bares
Title: Orion Nebula (M42) and the Horsehead Nebula (B33)

Image Data:

Camera : CentralDS Astro 60D Cooled.
70/200 Canon lens, open at 135mm, 35×5 300 seconds
Site: Aosta Valley, Italy

Mehmet Ergün

Photographer: Mehmet Ergün
Title: M31 Andromeda Galaxy

Image Data:

Equipment:
Nikon D850 (CentralDS)
ASA Astrograph 12″
Hutech IDAS D1
Baader 7NM H-Alpha
ALT 7 Mount

EXIF:
20 x 3min RGB
6 x 5min H-Alpha

Software:
PI, PS, LR

Alessandro Cipolat Bares

Photographer: Alessandro Cipolat Bares
Title: M31 Andromeda Galaxy

Image Data:

Camera : CentralDS Astro 60D Cooled.
Telescope: FSQ85
Site: Aosta Valley, Italy

Enrico Enzmann

Monochrome A7s CMOS Sensitivity Test

Debayered A7s CMOS

Gold wirings on 4 sides of sensor ares was covered by epoxy to protect from chemical solution. CMOS sensor is  having several defected points in debayering process. And these made Horizontal rows and vertical columns in image.

 

Test condition:

Astro A7s camera 1 set.

Low pass filter was removed, Hoya clear filter window on airtight chamber + Hoya UV IR cut filter in Drop-In filter holder.

Indoor table , 50mm F1.4 lens +white cover plate.

ISO100, 1/20sec electric shutter (Silent mode) exposure. sony RAW image format(ARW) was taken.

Original JPG images

1.Taken from color CMOS

2.Taken from mono CMOS

ARW file was processed to 16bit B/W image in RawDigger.

1. Image from Original Color CMOS

2.Image from Debayered A7s CMOS sensor( This sensor is the one extracted from another A7s camera and debayered by chemical solution.)

Level stretched image comparison.(255 ->30)

 

Center Area cropped, 16pixels x 15pixels area

 

Luminance Level Comparison (Black=0, White=100)

We can see the difference of pixel brightness  in Color CMOS :G1,G2 is more bright than Blue or Red pixels. It caused by the color filter character. In mono CMOS the bright level of pixels are very stable. I expected to see the level of mono CMOS pixels exceed to green pixels’s luminance value, but it’s  20% lower .  it’s most equal to Red value and 25% over  level of Blue pixels.

Average Luminance Level is Color CMOS =41, Mono Debayered CMOS= 39,  Monochrome sensor is slightly lower. But in resolution aspect, Monochrome sensor is 2 times higher compared to Color sensor.