Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

sgl_imaging_challenge_banner_dslr_mirrorlesss_winners.thumb.jpg.9deb4a8db27e7485a7bb99d98667c94e.jpg

ejwwest

Members
  • Content Count

    405
  • Joined

  • Last visited

Posts posted by ejwwest


  1. Taken at the 21st August Solar Eclipse at Menan Buttes, Idaho. A composite of 15 frames. Five were of the first partial phase, taken from just after first contact until just before second contact. A filter made of Baader Solar film was used and exposures were 1/400s. Five are during totality, various exposures to reveal Baily's beads at 2nd Contact, prominences, Inner Corona, Chromosphere, and 3rd Contact Diamond Ring. The second partial phase was taken in the same way and exposure as the first partial phase. The colour cast of the Baader film was corrected by an adjustment layer in Photoshop.

    Eclipse sequence v5 small.jpg

    • Like 5

  2. Just now, Scooot said:

    That's a tremendous set, the widefield's my favourite :) 

    That was very much a "try it and see" whilst I concentrated on the closeups. Just let the 5DMk3 trigger every 5 mins, ensuring I got a bright image during totality, and stacked with StarStax. Pity there is a lack of foreground interest, but very effective.

    • Like 1

  3. 1 minute ago, spaceboy said:

    That is an absolutely amazing capture. I'm guessing it must take a lot of trial and error to capture such an event as the ISS won't be lit as it approaches the moon ??? If the ISS was lit by the sun then again I'm guessing such an image would also be difficult or is the moon soo much brighter that it will always show the ISS outline?? Although saying that I'm sure it is just as difficult to image the ISS during the day as it crosses the sun as you can't see it coming either so the software must be pretty accurate at predicting transits.

    Well done and thanks for sharing.

    Yes. Took years to find the right technique. For the Sun and Moon shots where the ISS isn't visible I use a GPS to get the accurate time and start a burst of shots about 1 second before the predicted transit and stop about 1 sec after the transit. This usually means I have to shoot in JPEG, not RAW, as the camera buffer isn't big enough to hold more than about 7 shots in RAW. 

    • Like 1

  4. On 11/26/2016 at 22:50, johnfosteruk said:

    Splendid, was it planned?

    I regularly check Calsky to see when transits of the Sun and Moon occur and if one is reasonably nearby try to photograph them. I knew this one was occurring on the morning of 18th Nov so got up early, saw the sky was clear, and drove to a site close to the centreline (a car park at the University of Southampton in this case, but Calsky provides the path so you can find a convenient location). General technique is described here: https://ejwwest.wordpress.com/imaging-the-international-space-station/ 

    Had the path been visible from my back garden I'd have set up my telescope (2350mm focal length), but having to drive I used my 100-400mm Canon zoom lens with 2x extender giving me 800mm focal length so not as much detail as this:

    16463730451_143af1c9cb.jpgJust Passing Through! by James West, on Flickr 


  5. Here are some photographs taken during the total lunar eclipse on the morning of 28th September 2015. All photographs were taken from my garden in Chandlers Ford Hampshire.


    This was the so called "Supermoon" eclipse. All photos taken with a Canon 70D  with Canon's 100-400m IS (Mk 1)  Zoom lens and 2x extender (800mm efective focal length at f/11). The Partial phase was mainly at ISO 200 and exposures of 1/200 to 1/50s. The total  phase (and the "red" effect on partial phase) needed exposures of more than 1 second and/or high ISO. I took various shots between 1s and 10s and ISO of 800 to 6400 with the 70D long exposure noise reduction and high ISO noise reduction turned on. The camera was mounted on my Celestron EdgeHD 925 telescope tracking at Lunar rate. Unfortunately vibrations of the mount meant many shots had "judder" and were rejected.


    Whilst the media has focused on this being the last "Supermoon" eclipse before 2033, there will be Lunar Eclipses visible in the UK before then. For details of all future eclipse, the best source is <a href="http://eclipse.gsfc.nasa.gov/eclipse.html">NASA</a>.


    Start of partial phase:post-19575-0-97879600-1443443442_thumb.j


    Partial Phase:post-19575-0-06325200-1443443468_thumb.j

    post-19575-0-87453600-1443443488_thumb.j

    post-19575-0-82112200-1443443550_thumb.j


    Near Totality: post-19575-0-24396400-1443443576_thumb.j


    Totality: post-19575-0-86040500-1443443613_thumb.j


    Mid Eclipse: post-19575-0-28301600-1443443639_thumb.j

    • Like 10

  6. Thanks. From my back garden (or front) there is nothing far enough away that I can focus on.

    Peter

    If you have a camera with LiveView or equivalent, where you can use the LCD panel instead of the viewfinder, then you can centre a bright star in the centre, if necessary at a high ISO, and zoom in on it with digital zoom. Then use the manual focus ring until the star is as small and sharp as you can make it.

    At the moment Vega and Altair should be bright enough to focus on first.

    Sent from my iPad using Tapatalk


  7. Lovely images. Out of interest how did you get accurate focus? I always struggle with this.

    Peter

    The Canon 10-22mm lens has a large depth of field so doesn't need to be accurately focused and can be set on infinity using the focus ring and hoping for the best! In this case, I could focus on the arch whilst still light and then put on manual focus.

    Sent from my iPad using Tapatalk


  8. Fantastic images mate great foreground location aswell.

    What 10mm lens is it?

    Sorry if you have the lense in your sig but I can't see it on mobile

    It's the Canon 10-22mm EF-S lens.

    I tried using my flashgun to brighten the arch but with limited effect due to its distance. I used Lightroom's Magic brush to lighten it instead, but need to be careful of overuse.

    This photo (the unenhanced version) was shown on ITV Meridian Weather last night.

    Sent from my iPad using Tapatalk


  9. Another Solar transit (they're more frequent than you might imagine) but due to the weather didn't want to leave my scope outside. The clouds cleared enough in time to set  up my 400mm lens with 2x extender and the Thousand Oaks filter. Getting it focused is the biggest challenge but so is the exposure. I had to process quite a bit in Lightroom and then PSE12 to align and stack. 

    17483565940_3ccc1608c5_z.jpgISS Transiting the Sum by James West, on Flickr

    • Like 1
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.