Night photography tip: turn light sources into stars

Thursday 20 January 2022, 15:15 by Nando Harmsen | 4,823 views | 4 comments

This article was translated from Dutch with the help of AI. Read the original.

When you are taking photos in the dark, it can look great when the light sources in your image have a nice star shape. You used to need a special star filter for this, but with a well-chosen aperture, it is also very easy to do without filters. I will explain how to do it.

Not everyone likes it, but if you do, it is possible to turn light sources in your photo into a nice star shape. The only thing you need to do is choose a small aperture. For example, aperture f/8, f/11 or even f/16.

This photo was taken at f/5.6. Apart from the one street lamp, there is hardly a recognisable star shape.
All you need is a small aperture, so it is really that simple. What the star shape looks like depends on your lens. Some lenses produce five points, others six or seven, or even more.

There are also lenses that show almost no star shape. So try it out to see how your lens performs in this regard.

This photo was taken at f/8. The lens used produces a very nice star shape in the street lamps.
The light source also affects whether a star shape appears. A bright light source is more likely to show a star shape than a weak light source. The size of the light source also has an effect.

And then there is the exposure. If the exposure is set for the light source itself, with the surroundings very dark, the star shape will no longer be visible because it is too faint to see.

Less bright light sources show little or no star shape, while the brighter street lamps do. The photo was taken at f/11.
In general, you can assume that a star shape appears in street lamps or similar light sources from aperture f/8 with a good exposure. The further you stop down the aperture, the more noticeable the star shape will be.

Bear in mind that a smaller aperture will result in a longer shutter speed, or require a higher ISO. In other words, make sure you have a good exposure.

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About the author

Nando Harmsen has been photographing for more than 40 years. He specialises in wedding photography and landscape photography. Nando also gives talks, workshops, masterclasses and photo trips, and regularly reviews new and interesting equipment.

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4 comments

Matt wrote on Thursday 20 January 2022 at 17:29 | reply
De stervorm wordt bepaald door het diafragma in de lens: hoeveel diafragmabladen en of de diafragmabladen afgerond of recht zijn. Rechte diafragmabladen resulteren in mooiere stervormen.
This comment was written in another language and has not been translated yet.

Mac wrote on Friday 21 January 2022 at 18:51 | reply
Nog een aanvulling op Matt.
Oudere lenzen zijn meestal het beste voor sterren.
De moderne lenzen worden tegenwoordig ook vaak gemaakt met mooie "bokeh" in het achterhoofd. Dus ronde diafragma bladen
This comment was written in another language and has not been translated yet.

Arie wrote on Tuesday 25 January 2022 at 13:52 | reply
Kan ik deze 'sterren' ook in Photoshop maken?
This comment was written in another language and has not been translated yet.

Nando wrote on Tuesday 25 January 2022 at 15:25 | reply
@Arie:
Je kunt sterren toevoegen in Photoshop. Een brush met een stervorm is al voldoende om dat te doen. Er zijn meer manieren, maar het blijft achteraf toevoegen. Het zal nooit exact hetzelfde zijn. Mijn advies is om dit zoveel mogelijk ter plekke met je diafragma te creëren.
This comment was written in another language and has not been translated yet.

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