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(Entries) DPC #301: "Blue hour"

Printed From: Dyxum.com
Category: Dyxum Photographs
Forum Name: Dyxum Contests
Forum Description: Dyxum photographic contests
URL: https://www.dyxum.com/dforum/forum_posts.asp?TID=141067
Printed Date: 28 May 2022 at 11:28


Topic: (Entries) DPC #301: "Blue hour"
Posted By: svjetlana
Subject: (Entries) DPC #301: "Blue hour"
Date Posted: 13 May 2022 at 13:37
Dear Dyxumers,

The blue hour is the period of twilight (in the morning or evening, around the nautical stage) when the Sun is at a significant depth below the horizon. During this time, the remaining sunlight takes on a mostly blue shade. This shade differs from the colour of the sky on a clear day, which is caused by Rayleigh scattering.

The blue hour occurs when the Sun is far enough below the horizon so that the sunlight's blue wavelengths dominate due to the Chappuis absorption caused by ozone. Since the term is colloquial, it lacks an official definition such as dawn, dusk, or the three stages of twilight. Rather, blue hour refers to the state of natural lighting that usually occurs around the nautical stage of the twilight period (at dawn or dusk).

Many artists value this period for the quality of the soft light. Although the blue hour does not have an official definition, the blue color spectrum is most prominent when the Sun is between 4 and 8 below the horizon. Photographers use blue hour for the tranquil mood it sets. When photographing during blue hour it can be favourable to capture subjects that have artificial light sources, such as buildings, monuments, cityscapes, or bridges.

Example:

@@ "Mesmerized"


A-580, DT 16-50mm F2.8 SSM, f/22, 10, 16mm, ISO100.

Good light,
Svjetlana

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REQUIREMENTS FOR VALID ENTRIES:
Each entry has to be preceded by two 'at' symbols (@@) and a title in plain text (i.e. avoid using any BB-codes) so that the automatic process we use can recognize an entry and pick it up. Exif information should also be included. Please use the following template to make sure you include all of the relevant information in a suitable format:


@@ photo title
[IMG]link to the photo[/IMG]
Camera:
Lens:
F-stop:
Shutter speed:
ISO:
EV:
Focal length:
Flash:
Filters and such:
Film:

Entries which do not follow the above requirement will be discarded. Please remember also to get familiar with the Specific Rules section below.

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This DPC will close on 13/6/2022 (earliest closing time) 21:00 Dyxum Time


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Please let me remind that the winner will be awarded with the Golden Dyxum Patch

       


which will be sent to winner for free. It should be noted that this award was only possible because of Confusedapollo's hard work and commitment.

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General rules and intent
The main purpose of the Dyxum Photo Contest is to share our images in an effort to present ourselves as photographers.

All registered users are invited to participate. Each DPC is opened for approximately one month. After that a new thread is opened presenting all entrants and asking Dyxmers to vote. This voting is also opened for one month, after which all votes are counted and a winner is announced (separate "DPC winner" thread is started).


Specific rules:
  • Only registered members of Dyxum.com can participate,
  • The pics must be taken with A-Mount or E-mount cameras (either film or digital),
  • Photos that have been winners in previous DPCs (or shots that are similar) are not eligible.
  • Only two entries per competition per member are accepted. Entries can be changed freely up to the closing time. If there will be more than two photos from a given Dyxumer the last two will be accepted as his/her entries
  • For each entry following information should be provided:
    • Title (which must be preceded by the "@@" marker),
    • Camera model,
    • lens brand/model,
    • In case of film cameras - type/brand/speed of a film used,
    • EXIF info (not mandatory in case of film cameras): ISO speed, shutter speed, aperture, EV compensation, focal length (for zooms),
    • info about any special filters/converters.
  • Photos should be in an easy viewable size - no more than 1024x900 pixels (if they are bigger they will be automatically downsized by the forum app),
  • No extra textures or objects that were not present during shooting should be added. Generally the stress is on photography not on post-processing, although we accept some slight modifications. If you have any doubts ask the organizer of the contest by PM.
  • Images containing nudity, violence or and any kind of provocative subjects are not allowed.
Photos which flagrantly break the above rules will not be considered when selecting finalists.

Posting images
Unfortunately Dyxum doesn't have sufficient web space to host images for the contest. Because of this each participant needs another hosting site for his/her images and to post them by entering the image URL in the post (surrounded by the appropriate tags). Please note that images bigger than 800 pixels (the longer side) will be resized without any further post-processing.

Copyright
The photos entered remain copyrighted by the original photographer, and by entering you are giving permission for the pic/s to be used on this site only. You will be contacted about any proposed subsequent promotional use on this site of your pic/s.

Should you have any doubts or questions regarding the contest please do not hesitate to contact a member of the admin or moderator groups



Replies:
Posted By: Jozioau
Date Posted: 14 May 2022 at 01:45
@@Blue hour approaches, Bordeaux
https://flic.kr/p/Km6YpN"> https://flic.kr/p/Km6YpN - Blue hour approaches, Bordeaux by https://www.flickr.com/photos/jozioau/ - Joe Lewit , on Flickr
Camera: a99ii
Lens: Carl Zeiss 24-70mm f2.8 Vario-Sonnar
ISO: 5000
Shutter: 1/60
Aperture: f6.3
EV: -
Focal length: 24mm
Filter: UV


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"Your first 10,000 photographs are your worst" - Henri Cartier-Bresson
https://www.flickr.com/photos/jozioau/albums - My FlickrPro site


Posted By: pegelli
Date Posted: 19 May 2022 at 12:11
@@ Golden fountain at the blue hour
https://pegelli.smugmug.com/Other/200808/i-9tM6vL8/A">
A700 + Minolta 24-105D, 55 mm, 1/10 sec, f4.5, iso 800

B.t.w., this fountain can also be seen in Jozioau's submission above, on the left side in front of the smaller building



@@ Blue hour at the Wijnegem locks in the King Albert canal
https://pegelli.smugmug.com/Other/201401/i-bK8SLHK/A">
NEX6 + Sony E10-18/4, 10 mm, 1/60 sec, f4.0, iso 500

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You can see the April Foolishness 2021 exhibition https://www.dyxum.com/dforum/april-foolishness-2021-the-exhibition_topic139732.html - here Another great show of the talent we have on Dyxum


Posted By: Jozioau
Date Posted: 25 May 2022 at 05:22
@@Ballooning over the Yarra Valley at dawn
https://flic.kr/p/acQLah"> https://flic.kr/p/acQLah - Ballooning over the Yarra Valley at dawn by https://www.flickr.com/photos/jozioau/ - Joe Lewit , on Flickr
Camera: a700
Lens: Carl Zeiss Vario-Sonnar T* DT 16-80mm F3.5-4.5 ZA
ISO: 800
Shutter: 1/10
Aperture: f4.5
EV: -
Focal length: 35mm
Filter: UV

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"Your first 10,000 photographs are your worst" - Henri Cartier-Bresson
https://www.flickr.com/photos/jozioau/albums - My FlickrPro site


Posted By: LAbernethy
Date Posted: 26 May 2022 at 01:51
@@ Forget-Me-Not

Camera: Sony SLT-A99V
Lens: Sony 28-75mm F2.8 SAM
F-stop: F/3.2
Shutter speed: 1/6sec.
ISO: 100
EV: +0.70
Focal length: 75mm
Flash: no
Filters and such: no
Film: no



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