Super wide field Crescent Nebula, 2021

NGC 6888

A super wide field image of Crescent nebula in Cygnus constellation, 4,700 light years away. This is just 25 mins of data I took in a short and bright hot summer night (July 2021). I used a D810A on a FSQ-85ED and its flattener guided with a Lacerta MGEN-II Superguider.

Tech Card

Date / Location

18th July 2021, Warwickshire, GMT+0, United Kingdom, TEMP: 20C, Bortle Class 4 ~SGM: 21.20 mag./arc sec2

Equipment

Camera: Nikon D810A

Imaging Telescope: Takahashi FSQ-85ED

Correcting Lens: Takahashi Flattener 1.01x (composite focal length at 455mm and focal ratio at f/5.4)

Mount: iOptron CEM25EC guided with Lacerta MGEN-II Superguider

Image Quality

14 bit RAW (NEF)

Exposure time per image / number of composities and sensitivity

ISO 1250, 5 x 300" subs

Total Integration Time

25mins

Calibration Frames

16 Darks, 16 Bias, 24 Flats

Software

PixInsight 1.8.8-8

Lightroom

Photoshop

DEEP SKY

Deep Sky photographs

STARSCAPE

Starscape photographs

SOLAR SYSTEM

Solar system photographs