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Observation by Peter Anderson: Comparison Canon 300D 6MP, 70D 20MP, 90D...

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Peter Anderson

Observer

Peter Anderson

Observed

2021 Jan 15 - 16:05

Uploaded

2021 Feb 17 - 06:05

Objects

The Orion Nebula (M42)
Equipment

Planetarium overlay









Constellation

Orion

Field centre

RA: 05h46m
Dec: -05°24'
Position angle: -179°26'

Field size

8° × 3°

Equipment
  • See text below
Exposure

See text below

Location

Brisbane Australia

Target name

Orion Nebula

Title

Comparison Canon 300D 6MP, 70D 20MP, 90D 32MP

About this image

Recently I decided to perform an experiment comparing the 300D, 70D and 90D and this is the purpose of this article. All three cameras have the same size CMOS sensor. For the experiment I would use the same ISO, F stop, and exposure and take the images consecutively. I would initially use the high resolution (but inexpensive) Canon 50mm F1.8 lens stopped down to F4 for better performance to image the constellation of Orion at 1600 ISO using the three cameras at the same exposure length. Upon commencing this exercise the 300D decided it would only operate at F5.6 on the ‘manual’ setting so I gave it twice the exposure length to compensate. These images were taken on 15th January 2021

When this was completed, I grossly enlarged the small section of each image surrounding the Orion nebula so that direct comparisons could be made.

300D 1600ISO and 30secs at F5.6. 70D and 90D  1600 ISO and 15 secs at F4 (average of images - 10hrs 30min UT.)

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