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Observer et photographier Vénus

Par Pierre Causeret Dernière modification 12/07/2012 14:36
Contributeurs : Florence Trouillet

Observer Vénus

Vénus à l'oeil nu

Vénus à travers des jumelles

Photograph Venus

With a normal camera lens

It is easy to photograph a landscape with Venus in it in the evening, before it gets totally dark (until the end of May) or in the morning when the day dawns (from late June). Settings can be left on automatic.

1C Venus Moon evening

The Moon (on the right) and Venus (on the left) in the evening
(automatic settings)


1C Venus morning
Venus in the morning (exposure time : 15 s)

 

 

With a telephoto lens

At the end of May, in the evening, or late in June, in the morning, the crescent of Venus will measure nearly 1’ in its greatest dimension (and less than 10" wide).
With a telephoto lens of 300 mm focal length, which gives a 10 to 20 pixels picture, depending on the camera sensor, the crescent will be small but still visible.

With a telescope

Here are three ways to photograph the crescent of Venus. In each case, it is essential to carry out tests.

  • 1. Instrument + ocular + compact digital camera fixed behind the ocular. You can buy a system for attaching the unit behind the ocular or make your own.
1C camera telescope

Compact digital camera mounted behind a refracting telescope without ocular

 

  • 2. Instrument without ocular + webcam without lens (possibly with a Barlow lens). Again, you can buy a system that enables you to attach the webcam to the eyepiece holder.

1C webcam

Webcam with adapter which enables it to be attached to the eyepiece holder.

 

1C webcam telescope

Webcam behind a telescope with a Barlow lens

 

  • 3. Instrument without ocular + digital reflex camera without lens (possibly with a Barlow lens).

1C reflex cassegrain

Reflex camera mounted on a Schmidt-Cassegrain telescope of 200 mm diameter

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Arts and Stars
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  • E-mail : charles-henri.eyraud [arobase] ens-lyon.fr
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